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45 results about "Ionic selectivity" patented technology
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The ionic selectivity is defined to judge the abilities of the nanopore to control the ion flux[119,120]. Some experiments have shown that the internal wall of the pore could cause those rectification phenomena. ...
A composite ion-exchange membrane and a preparation method thereof, and a redox flow battery
ActiveCN103236553AHigh ion selectivityLow costCell electrodesRegenerative fuel cellsPolymer scienceSulfonated polymer
The present invention discloses a composite ion-exchange membrane and a preparation method thereof, and a redox flow battery. The composite ion-exchange membrane is prepared by using a sulfonated polymer as a matrix, incorporating inorganic materials into the matrix, and mixing the sulfonated polymer and the inorganic materials uniformly. The ion-exchange capacity of the sulfonated polymer is 0.1-5mmol / g, the mass percentage of the sulfonated polymer is 80-99.99wt%, the mass percentage of the inorganic materials is 0.01-20wt%, and the mass percentagesof the sulphonated polymer and the inorganic materials sum to 100wt%. According to the present invention, by introducing a certain amount of inorganic materials into a certain amount of the sulfonated polymer matrix for modification, the composite ion-exchange membrane is allowed to both have a high ionic selectivity and a high stability. By applying the prepared composite ion-exchange membrane in the redox flow cell, higher battery efficiency and more stable battery performance can be achieved. The preparation method of the composite ion-exchange membrane is simple and is conducive to promoting the industrial development of redox flow batteries.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Composite film for flow energy storage battery and application thereof
InactiveCN102867928AHigh ion selectivityImprove hydrophilicitySynthetic resin layered productsCell component detailsComposite filmOrganic polymer
The invention discloses a composite film for a flow energy storage battery and an application of the composite film in the flow energy storage battery. The composite film disclosed herein is characterized by using one or more than two of organic polymer resin or sulfonated polymer resin as raw material to prepare a porous film as a matrix, and successively alternately self-assembling cationic polymer resin and anion polymer resin layer by layer on the surface of the matrix by static electricity to form the composite film. The composite film disclosed herein has the advantages of simple preparation method, environmentally friendly process, controllable number of assembling layers, and adjustable ionic selectivity. Compared with original porous films, the composite film disclosed herein has good hydrophilicity and vanadium ion blocking ability, and an all vanadium flow energy storage battery assembled by using the composite film has higher efficiency and longer self-discharge time.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
Fluorescence-enhanced Hg<2+> detection chip based on oligonucleotide chains and method thereof
InactiveCN102912011ASimple manufacturing methodHigh sensitivityMicrobiological testing/measurementFluorescence/phosphorescenceThymineChemical modification
The invention relates to a fluorescence-enhanced Hg<2+> detection chip based on oligonucleotide chains and a method thereof. The invention is characterized in that Hg<2+> can specifically realize the covalent binding with T basic groups on two adjacent full thymine (T) oligonucleotide chains to form a stable intermolecular T-Hg<2+>-T structure, thus inducing the release of complementary chains hybridized with the full T oligonucleotide chains. The preparation method comprises the following steps: fixing a detection probe onto a chemically modified glass slide, and then respectively hybridizing with the fluorescence-labeled and quencher-labeled complementary chains. When the chip is in use, only a sample to be detected needs to be added onto the chip and kept for a time period, the chip is rinsed and then scanned by a fluorescence chip signal analysis system, and the change of a fluorescence signal is analyzed to realize Hg<2+> detection. The higher the Hg<2+> concentration in a sample is, the more the fluorescence signal is enhanced. The concentration range of the detected Hg<2+> is 10 nM-100 muM. The invention has favorable ionic selectivity.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Molecular sieve composite porous membrane used for redox flow battery, and preparation method and application of molecular sieve composite porous membrane
InactiveCN106876638AHigh ion selectivityImprove single cell performanceCell component detailsEnvironmental resistanceMolecular sieve
The invention discloses a preparation method of an inorganic molecular sieve composite porous membrane used for a redox flow battery, and an application of the inorganic molecular sieve composite porous membrane in the redox flow battery. The porous membrane, which is prepared by taking one or more than two kinds of organic macromolecule resins as the raw material, is used as a base body; and the surface of the base body is compounded with an inorganic molecular sieve to form the composite porous membrane. The composite porous membrane has simple preparation method, environment-protection process, controllable inorganic molecular sieve types and bore diameters, and adjustable ionic selectivity; compared with an original porous diaphragm, the molecular sieve composite porous membrane has relatively high ionic conductivity and ion blocking capability, so that the ionic selectivity is greatly improved; and in addition, by virtue of the composite membrane, mobility of an electrolyte solution can be effectively suppressed and the problem of capacity fading can be solved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Nitrate radical ionic selectivity micro-electrode and preparing method thereof
InactiveCN101441193AReduce volumeFine tipMaterial analysis by electric/magnetic meansEpoxyLower limit
The invention discloses a nitrate ion selective microelectrode and the making method thereof. The nitrate ion selective microelectrode comprises a conical glass sleeve, and is characterized in that the cavity of the conical glass sleeve is filled with post-film electrolyte, the tip portion of the conical glass sleeve is filled with nitrate ion selective liquid film, Ag / AgCl filament is arranged in the conical glass sleeve, and at the mouth of the conical glass sleeve, epoxy resin is used to fixing the Ag / AgCl filament and sealing the conical glass sleeve. The size of the tip portion of the nitrate ion selective microelectrode is 1-10mum, the linear response ranges from 10<-1> to 10<-5>M, the gradient is 57.647mV / -log[NO3-], and the detection lower limit is 1*10<-5>M. The response time of the electrode is short and generally less than 5s, moreover, the nitrate ion selective microelectrode is small in size and simple to manufacture at a low cost.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Liquid flow cell composite membrane and application thereof
InactiveCN104716355AImprove hydrophilicityImprove performanceRegenerative fuel cellsCoatingsMembrane configurationOrganic polymer
The invention relates to a liquid flow cell composite membrane and application thereof in liquid flow cells, a pore membrane prepared from raw materials of one or two or more kinds of organic polymer resin is used as a matrix, one side surface of the matrix is composited with a dense membrane prepared from cation exchange resin, and the composite membrane is simple in preparation method and environmental friendly in process. Compared with the original pore membrane, the composite membrane has higher hydrophily and ionic selectivity, and can effectively inhibit the electrolyte solution migration problem, and the type and use scope of the liquid flow cell pore membrane material can be expanded.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Solvent processing method for polymer porous ion conducting membrane for flow battery
The invention relates to a solvent processing method for a polymer porous ion conducting membrane for a flow battery; a polymer porous ion conducting membrane is placed in a processing solvent and soaked for 20 min or more, and then the film is placed at the temperature of 10-50 DEG C to make the solvent volatilized for 10 h or more; the polymer porous ion conducting membrane is prepared by one or two or more of organic polymer resins containing no ion exchange groups and used as raw materials. The porous ion conducting membrane after solvent processing has smaller pore size and also has high hole connectivity before processing, therefore, the porous ion conducting membrane has high ionic selectivity and proton conductivity as well as excellent oxidation stability. An all-vanadium flow battery assembled by the polymer porous ion conducting membrane has good cycle life and good battery efficiency.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Application of porous membrane in neutral system zinc-iron flow battery
InactiveCN105742548AAchieve selective pass-throughAperture adjustableCell electrodesRegenerative fuel cellsPhysical chemistryPorous membrane
The invention relates to an application of a porous membrane in a neutral system zinc-iron flow battery. The porous membrane is a porous conductive membrane which is prepared from more than one or two organic polymer resins as a raw material through a phase inversion method, wherein the membrane aperture size of the porous conductive membrane is 0.1-100nm; and the porosity is 5%-70%. Compared with original other ion exchange membranes, the porous conductive membrane has relatively high ionic selectivity, can effectively inhibit the migration problem of an electrolyte solution; the cycle lifetime of the battery is prolonged; the battery performance is improved; and meanwhile, the production cost of a membrane material for the system flow battery is greatly reduced.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Solar photo-thermal driven seawater desalination and iontophoresis power generation system and method
ActiveCN112551624ARealize diffusion power generationEasy to operateMembranesGeneral water supply conservationPhoto irradiationEngineering
Owner:XI AN JIAOTONG UNIV
Method for preparing calcium ion selective molecular sieve and application of molecular sieve in descaling
ActiveCN103936023AIncrease exchange rateQuick removalOther chemical processesSeawater treatmentMolecular sieveCrystallite
The invention provides a method for preparing a calcium ion selective molecular sieve and an application of the molecular sieve in descaling. The molecular sieve is prepared by a two-step continuous hydrothermal crystallization method, which comprises the steps of firstly reacting a silicon source and an aluminum source under the action of sodium hydroxide solution to form an aluminosilicate sol, carrying out hydrothermal crystallization for 0.5-1 hour under a sealed condition at 60-90 DEG C, then adding fatty alkyl amines as a structure-directing agent, adjusting the pH value of the solution to 8-13, then carrying out hydrothermal crystallization at 130-150 DEG C for 24-72 hours, filtering, washing and roasting at high temperature to obtain the molecular sieve. The molecular sieve prepared by the method contains cubic crystal particles as well as a plurality of flaky and needle-like crystals and has a higher calcium ion adsorption capacity and adsorption rate which is 2.86 times of the adsorption rate of the traditional 4A molecular sieve. The molecular sieves prepared by the method provided by the invention is used for the field of the descaling of geothermal water, can effectively prevent heat transfer equipment from scaling and can be used as an effective measures to geothermal water pretreatment descaling in a geothermal water descaling system.
Owner:TIANJIN UNIV
Device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts
ActiveCN102502927AStable manufacturingImprove resource utilizationSeawater treatmentDispersed particle separationAlkaline waterSoil science
The invention discloses a device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts. The device is composed of an anode chamber, a first fresh water tank, a concentrated water tank, a second fresh water tank and a cathode chamber, wherein the compartments are isolated by ion selective permeation walls, a voltage is applied at two ends of the device, and inflow water passes through the first fresh water tank and then passes through the second fresh water tank so as to finally obtain purified outflow water. Under the electromigration action, anions and cations migrate toward anion and cation selective permeation walls, are adsorbed and permeate to enter the concentrated water tank, and the concentrated solution in the concentrated water tank can be subjected to ion recovery. The device can be used for desalinizing seawater and alkaline water, concentrating mineral salts from seawater, extracting mineral salts from alkaline water, softening boiler water, extracting mineral matters from underground mine water and preparing pure water, and can also be used for industrial wastewater treatment to recover useful ions from the wastewater.
Owner:ZHEJIANG UNIV
1,3-position symmetric squarylium cyanine probe based on carboxamidoquinoline as well as preparation method and application of probe
ActiveCN107522658AHigh sensitivityGood choiceOrganic chemistryMaterial analysis by observing effect on chemical indicatorN-Butyl AlcoholChloroacetyl chloride
The invention belongs to the field of chemical analysis and testing and particularly relates to a preparation method and an application of a 1,3-position symmetric squarylium cyanine probe based on carboxamidoquinoline. Firstly, a mixture of 8-aminoquinoline and 2-chloroacetyl chloride is subjected to ice-bath stirring in a dichloromethane solvent, a product and p-phenylenediamine are subjected to reflux in a methanol solvent, then 3,4-diethoxy-3-cyclobutene-1,2-dione and a product are subjected to reflux reaction in toluene and n-butyl alcohol, and a final product is obtained through separation and purification. The obtained squarylium cyanine compound has excellent ionic selectivity and facilitates silver ion detection.
Owner:CHANGZHOU UNIV
Preparation method of nickel-manganese spinel high-voltage positive material of lithium secondary battery
InactiveCN104466166AEasy to operateImprove electrochemical performanceCell electrodesManganeseSolvent
The invention discloses an organic coprecipitation preparation method of a nickel-manganese spinel high-voltage positive material LiNi0.5Mn1.5O4 of a lithium secondary battery. The organic coprecipitation preparation method is characterized by comprising the following steps: weighing a lithium source, a nickel source and a manganese source according to a stoichiometric ratio, dissolving the sources into deionized water to obtain a solution A, dissolving an organic precipitating agent to obtain a solution B, and mixing the solution A and the solution B to generate a precipitation; and then directly evaporating to remove a solvent without carrying out filtering and precipitation washing to obtain a precursor, and then carrying out heat treatment to obtain the target product LiNi0.5Mn1.5O4. According to the organic coprecipitation preparation method, Ni<2+> and Mn<2+> ions are compounded with the organic precipitating agent through coordination bonds in the forming process of the precipitation, so that the very high ionic selectivity is achieved; in addition, the precipitating agent can be removed by being decomposed in a sintering process, so that the precipitation is unnecessary to wash, not only is a preparation process simplified, but also the stoichiometric ratio of a product can be well controlled, and the process control and the product purity and property have the very good repeatability.
Owner:UNIV OF JINAN
Techniques, system and apparatus for selective deposition of a layer using angled ions
ActiveUS10879055B2Avoid complex solutionsElectric discharge tubesVacuum evaporation coatingSelective depositionThree dimensional shape
A method is provided. The method may include providing a substrate, the substrate comprising a substrate surface, the substrate surface having a three-dimensional shape. The method may further include directing a depositing species from a deposition source to the substrate surface, wherein a layer is deposited on a deposition region of the substrate surface. The method may include performing a substrate scan during the directing or after the directing to transport the substrate from a first position to a second position. The method may also include directing angled ions to the substrate surface, in a presence of the layer, wherein the layer is sputter-etched from a first portion of the deposition region, and wherein the layer remains in a second portion of the deposition region.
Owner:VARIAN SEMICON EQUIP ASSOC INC
Preparation method of indium oxide and precursor thereof
ActiveCN110644013AAvoid it happening againSolve pollutionMaterial nanotechnologyElectrolysis componentsElectrolytic agentIndium
The invention provides a preparation method of indium oxide and a precursor thereof, belonging to the technical field of inorganic materials. According to the method, metal indium is used as a positive electrode, an inert electrode is used as a negative electrode, an aqueous ammonium salt solution is used as an electrolyte for electrolysis, and hydrogen peroxide is added during electrolysis to obtain indium hydroxide, so nitrate is prevented from being reduced to generate nitrite or nitric oxide, and the preparation process is environmentally friendlier; an anolyte circularly flows between a positive chamber and an anolyte storage tank, a catholyte flows through a negative chamber from a catholyte storage tank and then flows to the anolyte storage tank, and NH<4+> is diffused from the positive chamber to the negative chamber through a cation selective permeation membrane, so the stability of the anolyte and the catholyte is ensured, subsequent stable acquisition of nanometer indium oxide powder with uniform granularity is well guaranteed, and zero emission of waste gas and waste water is easy to achieve; meanwhile, the anolyte can still guarantee normal operation of a system underthe condition of a high solid content, so process efficiency is improved, productivity is increased, and production cost is reduced.
Owner:昆明先导新材料科技有限责任公司
Proton-conducting membrane for flow batteries and preparation method thereof
ActiveCN106188543AHigh ion selectivityImprove conductivityFinal product manufactureRegenerative fuel cellsHeat stabilityEngineering plastic
Owner:BEIHANG UNIV
Membrane-less electrodeionization-based water softening device and water softening method therefor
ActiveCN102491461AStable manufacturingImprove resource utilizationGeneral water supply conservationDispersed particle separationWater desalinationWater use
The invention discloses a membrane-less electrodeionization-based water softening device and a water softening method therefor. The membrane-less electrodeionization-based water softening device comprises anode chambers, first water desalination tanks, concentrated water tanks, second water desalination tanks and cathode chambers. Each adjacent two of the anode chambers, the first water desalination tanks, the concentrated water tanks, the second water desalination tanks and the cathode chambers are separated by an anion selective-exchange wall or a cation selective-exchange wall. The water softening method for the membrane-less electrodeionization-based water softening device comprises the following steps that voltage is applied to two ends of the membrane-less electrodeionization-based water softening device; and water needed to be softened passes through the first water desalination tank and then passes through the second water desalination tank to form purified product water. Through electromigration action, anions or cations respectively move to the anion selective-exchange wall or the cation selective-exchange wall, are adsorbed and permeate into the concentrated water tank,wherein a concentrated solution in the concentrated water tank can recover the cations and the anions. The membrane-less electrodeionization-based water softening device can realize softening of boiler feed water, preparation of purified water, desalination of sea water and extraction of mineral substances of underground mineral water, and can be utilized for treatment on industrial sewage and recovery of useful ions of the industrial sewage.
Owner:ZHEJIANG UNIV
System and method for solar-driven photothermal seawater desalination and ion electroosmosis power generation
PendingUS20220119285A1Stable and simple to operateLow costMembranesGeneral water supply conservationEngineeringVisor
The present disclosure discloses a system and a method for solar-driven photothermal seawater desalination and ion electroosmosis power generation. In the system, a first reservoir is provided with a first electrode immersed in seawater; a second reservoir is connected to the first reservoir via a cation selective nanofilm; a third reservoir is provided with a second electrode immersed in seawater, and the third reservoir is connected to the second reservoir via an anion selective nanofilm; and an adjustable sun-visor shields the cation selective nanofilm to form a first preset part of solar illumination and shields the anion selective nanofilm to form a second preset part of the solar illumination. Therefore, the cation selective nanofilm and the anion selective nanofilm are each under an asymmetric illumination to generate a temperature gradient.
Owner:XI AN JIAOTONG UNIV
Seawater desalination system and desalination method based on solar energy
ActiveCN110921781AAvoid it happening againWatered down realizationMembranesGeneral water supply conservationProcess engineeringEnvironmental engineering
The invention discloses a seawater desalination system and desalination method based on solar energy. In the desalination system, a second reaction tank is connected with a first reaction tank througha positive ion selective nano-film, an outer pipeline is provided with a first valve for controlling liquid flow, the volumes and concentrations of seawater in the first reaction tank and the secondreaction tank are the same, a first electrode and a second electrode are connected through a first external circuit, a pump is communicated with the second reaction tank and a third reaction tank so as to pump a seawater solution without the positive ion salt from the second reaction tank into the third reaction tank, a fourth reaction tank is connected with the third reaction tank through a negative ion selective nano-film, the third reaction tank is connected with the fourth reaction tank through a second outer pipeline, the second outer pipeline is provided with a third valve for controlling liquid flow, the third reaction tank and the fourth reaction tank have the same seawater solution volume and concentration, the third electrode and the fourth electrode are connected through a second outer circuit, and the fourth reaction tank is provided with a liquid output pipeline.
Owner:XI AN JIAOTONG UNIV
Heavy metal ion adsorption material and preparation method and application thereof
PendingCN111992187AHigh selectivityWide applicabilityOther chemical processesWater contaminantsSio2 nanoparticleNanoparti cles
The invention discloses a heavy metal ion adsorption material and a preparation method and application thereof. The material is a magnetic sodium alginate composite material composed of sodium alginate and Fe3O4-coated SiO2 nanoparticles, wherein the sodium alginate serves as a framework and is of a porous structure, and pores of the sodium alginate are filled with the magnetic Fe3O4-coated SiO2 nanoparticles. The magnetic sodium alginate composite material provided by the invention has high adsorption capacity on lead, nickel, cadmium, cobalt, copper, magnesium, zinc and other heavy metals inwastewater, especially has good selectivity on lead ions, the maximum adsorption capacity reaches 137mg / g, and the adsorption rate reaches 83%. The material has good reusability and convenient magnetic separability, still keeps 85% of adsorption effect after being repeatedly used for ten times, and has wide application prospects in the aspect of removing heavy metal ions in sewage.
Owner:XUZHOU UNIV OF TECH
Method for preparing pH-responsive nanofluidic diode based on nanopores modified by polyarginine and polyglutamic acid layer by layer
The invention relates to a method for preparing a pH-responsive nanofluidic diode based on nanopores modified by polyarginine and polyglutamic acid layer by layer. The inner surfaces of the nanoporesare modified by adopting a layer-by-layer polyelectrolyte electrostatic adsorption method. The method comprises the following steps of firstly, carrying out chemical etching on a PET film to obtain asingle conical polyarginine modified nanopore, and enabling the nanopore modified by the polyarginine molecule to be subjected to pH action to obtain the nanofluidic diode with anion selectivity. Polyglutamic acid molecules have a large number of carboxyl groups, polyarginine and polyglutamic acid can be modified on a polyarginine molecular layer through an electrostatic adsorption method, and nanopores modified by polyarginine and polyglutamic acid layer by layer are obtained. The nanopores modified by polyarginine and polyglutamic acid layer by layer are subjected to pH action to obtain thenanofluidic diode with cation selectivity.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for preparing nanofluid diode responsive to pH and temperature based on gelatin-modified solid nanopores
PendingCN112179954AGrooming AvoidThermometers using electric/magnetic elementsUsing electrical meansEtchingGelatin
The invention relates to a method for preparing a nanofluid diode responsive to pH and temperature based on gelatin-modified solid nanopores. The inner surfaces of the nanopores are modified by adopting an electrostatic adsorption method. Firstly, chemical etching is carried out on a PET film to obtain a single conical nanopore, at the moment, the inner surface of the nanopore has a plurality of carboxyl groups, and gelatin molecules have a large amount of amino groups, so that gelatin can be modified to the inner surface of the nanopore through an electrostatic adsorption method to obtain thegelatin-modified nanopore. Under the action of pH, the gelatin molecule modified nanopore is used for obtaining a nanofluid diode with cation selectivity, and the on / off state of the nanopore is adjusted through temperature. A covalent modification method is prevented from being used for modification, so that the problem that a nanofluid diode with pH and temperature response on a solid nanoporecannot be obtained due to insufficient modification density of gelatin molecules on the solid nanopore is avoided.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Magnetic solid-phase extraction agent as well as preparation method, application and application method thereof
PendingCN113274986ALarge adsorption capacityHigh selectivityOther chemical processesWater contaminantsPhosphateMagnetite Nanoparticles
The invention provides a magnetic solid-phase extraction agent as well as a preparation method, application and an application method thereof. The magnetic solid-phase extraction agent comprises magnetic nanoparticles, and the magnetic nanoparticles comprise magnetic spheres and phosphate radical groups. The magnetic ball comprises a magnetic core and a shell surrounding the magnetic core. According to the magnetic solid-phase extraction agent, the selectivity of a magnetic nanoparticle material to molybdenum ions is improved through a phosphate group, so that the recovery rate of the molybdenum ions is improved, the loss of the molybdenum ions is reduced, and the recovery rate of the molybdenum ions is improved.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Probe based on 1-and-3-symmetric squarine recognizing silver ions as well as preparation method and application thereof
ActiveCN109336797AHigh sensitivityGood choiceSulfonic acid esters preparationColor/spectral properties measurementsFiltrationHydrazine compound
The invention belongs to the field of chemical analysis tests, and more particularly relates to a probe based on 1-and-3-symmetric squarine recognizing silver ions as well as a preparation method andapplication thereof. The preparation method comprises the steps detailed as below: firstly, N-(4-nitrophenyl)iminobisetnanol and paratoluensulfonyl chloride are taken as monomers for preparing a compound 2; secondly, the compound 2 and methyl thioglycolate are used for preparing a compound 3; thirdly, the compound 3 is reduced by hydrazine hydrate for preparing a compound 4 with sulfur ether and ester groups; fourthly, the compound 4 and a compound 5 are stirred in the mixed solution of methylbenzene and n-butyl alcohol at 110 DEG C for reflux reaction, and the final product is obtained by filtration and separation. The squarine compound obtained by the invention has excellent optical performance and ionic selectivity, thereby facilitating the detection of silver ions.
Owner:CHANGZHOU UNIV
Device for preparing silver cyanide (AgCN) by recovering hydrogen cyanide (HCN) through electrodynamic migration and method for device
ActiveCN102895854APurification process is stableAchieve emissionsDispersed particle separationMetal cyanidesCarbon fibersAllyl cyanide
The invention discloses a device for preparing silver cyanide (AgCN) by recovering hydrogen cyanide (HCN) through electrodynamic migration. The device consists of an electric waste gas treatment device, a cathode electro-Fenton device and an HCN gas absorption device, wherein the electric waste gas treatment device consists of an anode chamber and a cathode chamber; the anode chamber and a cathode chamber is partitioned by an ion permselective membrane; voltages are respectively applied to both ends of the device; a waste gas is converted into a CN<-> form after entering the cathode chamber, and transmits an ion exchange membrane under the action of electromigration to enter the anode chamber; a high-concentration HCN gas is obtained in the anode chamber; the high-concentration HCN gas is collected in an HCN recovery storage tank; absorption liquid in an absorption liquid tank contains Ag<+>; and the Ag<+> reacts with HCN in an absorption tower. The device disclosed by the invention can be used for recovering HCN in various cyanogen-contained waste gases, such as a carbon fiber tail gas, an allyl cyanide gas, a calcium carbide furnace gas, a coke-oven gas, a yellow phosphorus tail gas and the like, and the HCN can be produced into an AgCN product.
Owner:ZHEJIANG UNIV
Membrane-less electrodeionization-based water softening device and water softening method therefor
ActiveCN102491461BStable manufacturingImprove resource utilizationGeneral water supply conservationDispersed particle separationWater desalinationWater use
The invention discloses a membrane-less electrodeionization-based water softening device and a water softening method therefor. The membrane-less electrodeionization-based water softening device comprises anode chambers, first water desalination tanks, concentrated water tanks, second water desalination tanks and cathode chambers. Each adjacent two of the anode chambers, the first water desalination tanks, the concentrated water tanks, the second water desalination tanks and the cathode chambers are separated by an anion selective-exchange wall or a cation selective-exchange wall. The water softening method for the membrane-less electrodeionization-based water softening device comprises the following steps that voltage is applied to two ends of the membrane-less electrodeionization-based water softening device; and water needed to be softened passes through the first water desalination tank and then passes through the second water desalination tank to form purified product water. Through electromigration action, anions or cations respectively move to the anion selective-exchange wall or the cation selective-exchange wall, are adsorbed and permeate into the concentrated water tank,wherein a concentrated solution in the concentrated water tank can recover the cations and the anions. The membrane-less electrodeionization-based water softening device can realize softening of boiler feed water, preparation of purified water, desalination of sea water and extraction of mineral substances of underground mineral water, and can be utilized for treatment on industrial sewage and recovery of useful ions of the industrial sewage.
Owner:ZHEJIANG UNIV
Device and method for removing chloride ions in solid material
InactiveCN111453815AEfficient use ofHelp electrolysisSolid waste disposalWater contaminantsElectrolysisChloride
The invention relates to the technical field of removal of chloride ion impurities in a solid raw material, in particular to a device and a method for removing chloride ions in the solid raw material,and aims to solve the problem that the solid raw material is difficult to effectively utilize because the chloride ion impurities in the solid raw material cannot be more effectively and thoroughly removed in the prior art. The device comprises a container body; a cation selective permeable membrane and an anion selective permeable membrane are arranged in the container body, a sealed cavity formed by the cation selective permeable membrane is a cathode area, and a cathode is arranged in the cathode area; an anode area is formed between the anion selective permeable membrane and the containerbody, an anode is arranged in the anode area, a washing area is formed between the cation selective permeable membrane and the anion selective permeable membrane, and a stirring device is further arranged in the washing area. Chlorine ion impurities in a turbid liquid can be removed through electrolysis of the above device, so that solid raw materials can be utilized more effectively.
Owner:BAIYIN YUANDIAN TECHNOLOGY CO LTD
Anti-scaling electrodialysis system based on pH control and treatment process
PendingCN112408558AAchieve fouling-free operationImprove processing efficiencyWater/sewage treatment by electrochemical methodsDispersed particle separationPh controlAcid uptake
The invention relates to an anti-scaling electrodialysis system based on pH control. The anti-scaling electrodialysis system comprises an electrodialysis reactor, a fresh water tank, a concentrated water tank, a pH control system and an acid absorption system, wherein the electrodialysis reactor is formed by assembling an anode plate, a membrane stack and a cathode plate in sequence; the membranestack is composed of cation selective exchange membranes and anion selective exchange membranes which are arranged at intervals to form fresh water channels and concentrated water channels which are arranged at intervals, and polar water channels are arranged on the two sides close to the polar plates respectively; the pH control system is mainly composed of an acid storage tank, an acid adding pump, a pipeline mixer and an online pH meter, a polar water outlet of the polar water tank is connected to an inlet of the pipeline mixer, and the online pH meter is installed at the inlet end of the pipeline mixer. The anti-scaling electrodialysis system based on pH control has the beneficial effects that polar plate scaling in the system operation process can be avoided, scaling-free operation ofthe electrodialysis system is achieved, the operation working condition is optimized, and the water treatment efficiency is improved.
Owner:ZHEJIANG ZHENENG TECHN RES INST
Ammonium ion permselective nanofiltration membrane, preparation method, application of ammonium ion permselective nanofiltration membrane in sewage ammonium removal and selective ammonium removal device
InactiveCN110813093APromote resource utilizationSolve the technical problems of selective separationMembranesGeneral water supply conservationBenzeneDesalination
The invention provides an ammonium ion permselective nanofiltration membrane, a preparation method, application of the ammonium ion permselective nanofiltration membrane in sewage ammonium removal anda selective ammonium removal device, and belongs to the technical field of nanofiltration membranes. The ammonium ion permselective nanofiltration membrane comprises a desalination layer, a base membrane layer and a support layer which are sequentially arranged, and the base membrane layer contains an ammonium ion selective recognition receptor; and the ammonium ion selective recognition receptoris tripyrazole substituted benzene. Beneficial minerals such as potassium, calcium, sodium and magnesium in a water body can be intercepted, ammonium ions selectively permeate, and selective permeation, concentration and recovery of the ammonium ions are achieved; and low-pressure driving is adopted, so that the selective separation efficiency is improved, the cost is saved, and the energy consumption is reduced. The technical problem that ammonium ions cannot be selectively separated from potassium, calcium, sodium and magnesium ions through aperture screening of a traditional nanofiltrationmembrane is solved, the problems that a forward osmosis membrane method is low in ammonium removal efficiency, and osmotic balance limitation exists are solved, and the technical problems that a reverse osmosis method is high in cost and large in energy consumption, and beneficial ions such as potassium, calcium, sodium and magnesium ions cannot be reserved are solved.
Owner:BEIJING ORIGINWATER TECH CO LTD
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