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Water purification active carbon prepared from vegetal castoff and preparation method thereof
ActiveCN101121514ASuitable for removalStrong decolorization abilityOther chemical processesWater/sewage treatment by sorptionAdditive ingredientChemistry
A purified water activated carbon produced from the plant castoff includes the material ingredients of following weight percentage: The percentage of highly processed plant waste residue is between 80 percent and 84 percent. The percentage of non highly processed plant waste residue or a soft coal is between 15 percent and 19 percent. The percentage of a chemical additive is between 1 percent and 5 percent. The present invention makes the best of a lignin, a fibrin and a rudimental sugar in the plant waste residue and takes the ingredients as a backbone. A little chemical substance is used to adjust the hole distribution and the surface functional groups. The produced purified water activated carbon has the following advantages. (1). Strong decoloration capability. The present invention is applicable to the color substance with giant molecule group. (2). Strong deodorization capability. The present invention is especially applicable to the alga and alga poison. (3). Strong capability of removing the harmful and organic residuum (MCA / DCA / THC / MTBE and others). The present invention has also a low cost and a good effect.
Owner:邹炎
Preparation method and application of multi-site activated and modified reed-lutarioriparius biochar
ActiveCN110327882AImprove stabilityHigh pHOther chemical processesWater contaminantsMulti siteSoil heavy metals
The invention relates to the field of treatment to heavy metal pollution in water and soil, in particular to a preparation method of multi-site activated and modified reed-lutarioriparius biochar andapplication thereof to removal of heavy metals zinc and cadmium. The preparation method comprises the following steps: firstly washing, drying and crushing reed-lutarioriparius biomass, ultrasonicallystirring in an aqueous manganese ore powder solution thoroughly, then performing low-temperature hydrothermal carbonization to produce unactivated and unmodified biochar, then soaking the biochar ina calcium chloride-hydrogen peroxide mixed solution, activating a biochar-calcium chloride-hydrogen peroxide mixed solution by using microwave, and then modifying the dried biochar through ultravioletradiation to obtain activated and modified biochar, wherein the obtained biochar is applied to the removal of the heavy metals zinc and cadmium in the water and the soil. An application method comprises the following steps: adding the activated and modified biochar into heavy metal zinc and cadmium wastewater for an adsorption reaction; or directly adding into heavy metal zinc and cadmium contaminated soil, thoroughly mixing uniformly, and aging for a period of time to complete bioremediation of heavy metal zinc and cadmium pollution in the soil.
Owner:JIANGXI ACADEMY OF SCI
Acid flue gas washing wastewater treatment method and use thereof
ActiveCN108002580AEfficient removalInhibition of dissolutionTreatment involving filtrationWaste water treatment from gaseous effluentsFlocculationMulti pollutant
An acid flue gas washing wastewater treatment method includes the following steps: 1) solid-liquid separation: filtering acid flue gas washing wastewater, to obtain a suspended matter sediment and a wastewater solution; 2) oxidation: introducing the wastewater solution into an oxidation device, and carrying out an oxidative degradation reaction on organic matters in the wastewater solution, to remove the organic matters in the wastewater; 3) weak alkaline flocculation: adding a mixed alkali into the wastewater solution after oxidative degradation, adjusting the pH of the wastewater to weak alkaline, and making metal ions form precipitates; and filtering, to obtain a filter residue containing metal ion precipitates and a filtrate ; 4) ammonia removal: transferring the filtrate into a tubular mixer, adding an alkali liquid, and adjusting the pH of the filtrate in the tubular mixer to strong alkaline; and introducing the strong alkaline filtrate into a membrane absorption system, and carrying out ammonia removal. According to the method and the use thereof, the method has the advantages of clean treatment, multi-pollutant control, low treatment cost and high treatment efficiency.
Owner:ZHONGYE-CHANGTIAN INT ENG CO LTD
Method for preparing needle-shaped Fe-Mn-S ternary nano-material supported porous charcoal compound material
ActiveCN109225134AHighly uniform dispersionGood dispersionOther chemical processesWater contaminantsManganateCarbonization
The invention provides a method for preparing a needle-shaped Fe-Mn-S ternary nano-material supported porous charcoal compound material, relates to a method for preparing porous charcoal compound materials to solve the problems that an existing Fe-Mn binary nano-material is easily agglomerated and has low adsorption capacity to heavy metals. The method comprises the following steps: 1, performingpyrolytic carbonization on a biomass material; 2, performing hydrophilic treatment on the pyrolytically carbonized porous charcoal material; 3, stirring the hydrophilic porous charcoal material in a ferric salt aqueous solution, dropwise adding a manganate solution and sulfide solution for stirring, adding a weak alkaline solution for stirring, performing hydrothermal reaction, and drying to obtain the ternary nano-material supported porous charcoal compound material. According to the method, the interaction among molecules of a ternary nano-material is reduced by supporting the Fe-Mn-S ternary nano-material to the surface of the charcoal material, nano-particle agglomeration is reduced, and the dispersibility of ternary nano-particles is improved. The method is applied to the field of charcoal compound materials.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
Preparation method and application of magnetic compound arsenic adsorption agent
ActiveCN102941057AMild preparation conditionsLow raw material costOther chemical processesAlkali metal oxides/hydroxidesOxideSorbent
The invention relates to a preparation method and an application of magnetic compound arsenic adsorption agent. The method comprises the following steps of preparing magnetic nano particles; cladding the surfaces of the magnetic nano particles with iron and manganese hydroxide precipitates through a heterogeneous nucleation process; oxidizing the clad manganese; and dehydrating and drying to obtain the magnetic compound arsenic adsorption agent which is coated with the amorphous iron manganese compound oxide. Details of the preparation method are shown in a specification. The method and the application have the advantages that the method for wrapping the amorphous iron manganese compound oxide on the surface of the magnetic nano materials is disclosed at first time, the preparation condition is moderate, raw material cost is low, the arsenic can be rapidly and effectively removed and thoroughly processed, convenience in application is realized, the magnetic solid-liquid separation process is fast, the compound adsorption agent is safe and stable, iron or manganese is not released to the solution after the compound adsorption agent is reacted with low-concentration trivalent arsenic, and the effectiveness and recyclability of the compound arsenic adsorption agent can be realized. The application of the magnetic compound arsenic adsorption agent is characterized in that the magnetic compound arsenic adsorption agent is mainly used for eliminating inorganic trivalent arsenic with large toxicity in underground water or drinking water.
Owner:PEKING UNIV
Preparation method of ammonia removal material
ActiveCN103055833AGentle preparation processGood repeatabilityOther chemical processesAluminium silicatesMolecular sieveSewage
The invention discloses a preparation method of an ammonia removal material. The preparation method comprises the steps of: uniformly mixing NaY molecular sieves, ammonia removal effective constituents and a lubricating agent, then adding a binder and deionized water for kneading, carrying out extrusion forming, and drying to obtain the ammonia removal material, wherein the weight ratio of the NaY molecular sieves, the ammonia removal effective constituents and the lubricating agent is 1:0.2-0.7:0.02-0.15:0.1-0.7. The ammonia removal material has the advantages of being mild in a preparation technology, efficient and economic, having high repeatability and high strength, resisting high temperature and being suitable for removal of ammonia gas in industrial exhaust gas, sewage treatment plants and interior of rooms. The ammonia removal material provided by the invention is safe, non-toxic and low in cost. The invention provides an effective solution for ammonia pollution problem.
Owner:SUZHOU IND PARK ANZEWEN ENVIRONMENTAL PROTECTION TECH
Electrostatic dust catcher
InactiveCN101945609ASimple and economical to operateSimple and economical productionCarpet cleanersFloor cleanersVoltage sourceElectrode
The invention relates to electrostatic dust catcher comprising a first (1) and a second electrode (2) and a voltage source (3) for applying an electrical voltage between the two electrodes (1, 2), characterized in that the first electrode (1) is designed as a dust catching device and the second electrode (2) is grounded.
Owner:CARL FREUDENBERG KG
New method for removing rare earth element in spent fuel
The invention provides an ionic-liquid-containing dual-organic-phase flotation separation system and a method for removing rare earth elements in spent fuel. The system comprises a first organic phase (also called as an upper layer phase or phase 1) which comprises a basic solvent phase consisting of one or a plurality of the following substances: multi-chain organic alkane solvent, organic ester solvent, oleic acid fatty acid solvent and naphthenic acid solvent; a second organic phase (also called as a lower layer phase or phase 2) which is a composite phase of first type ionic liquid and second type ionic liquid, wherein the first type ionic liquid is imidazole ionic liquid and the second type ionic liquid is selected from pyridine, pyrrole, tertiary ammonium or other functionalized ionic liquid. Through a multistage tandem differential flotation process, the direct all-solid separation of rare earth elements from spent fuel can be effectively realized.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI +1
System for dry cleaning and separating-recovering waste plastics
InactiveCN101274462ASuitable for removalSuitable for classificationDrying solid materials with heatPlastic recyclingCycloneWastewater
The invention pertains to the technical field of recycling of renewable resources and relates to a waste plastics purification and separation recycling system by a dry process. The system comprises a charging port, an outside cyclone collector, an outside bag-typed collector, an inside cyclone collector, an inside bag-typed collector, a drying and separation section and a separator, wherein, the drying and separation section comprises an inner pipe on which eyeholes are evenly distributed and an outer pipe which is sheathed outside the inner pipe and the charging port is connected with an inlet of the inner pipe; the separator comprises an inlet, an elbow and a V-shaped outlet; in addition, the system also comprises two outlets, namely an external air duct pipe and an internal air duct pipe the angle between which is in the range of 10 to 120 degrees and the angle of deviation of a central line of the external air duct pipe against the horizontal line is in the range of -30 to 60 degrees; the outlet of the inner pipe is connected with the elbow by the inlet of the separator; the external air duct pipe is connected with the outside cyclone collector which is connected with the outside bag-typed collector by a pipe and the internal air duct pipe is connected with the inside cyclone collector which is connected with the inside bag-typed collector by a pipe. The system of the invention can ensure no secondary pollution due to generation of waste gas and water as well as no blockage in the system.
Owner:TONGJI UNIV
Method for removing optical resist after all-wet etching process
InactiveCN101968610ASuitable for removalEfficient removalPhotosensitive material processingSemiconductor devicesResistEtching
The invention discloses a method for removing optical resist after an all-wet etching process, belongs to a method for removing optical resist after a GaN etching process in LED processing technique and comprises liquid formulation and using method. The method comprises the following steps of: adding a proper amount of hydrogen peroxide into alkaline solution, soaking wafer in the alkaline solution for a period, taking the wafer out, flushing the wafer and shaking the wafer to dry, and then the optical resist on the surface of the wafer is removed completely. The method is suitable for removing any optical resist on an underlay that does not react with alkaline solution, the optical resist in liquid can be removed effectively by using the strong oxidizing property of hydrogen peroxide; besides, the method makes operation simple and convenient and the flow very simple and therefore is suitable for removing optical resist in large-scale production; and the cost of the method is low.
Owner:HC SEMITEK CORP
Mist generation device
InactiveCN102307669AHomogeneous and evenly distributedSuitable for removalLiquid spraying apparatusChemicalsEngineeringSecondary vein
The invention relates to a fractioning injector in particular for a Venturi-type mist generation device, comprising a main vein successively comprising an axial convergent vein (3) for receiving a pressurised gas flow, a cylindrical vein (5) and an axial divergent vein (7), said injector further comprising a substantially transverse secondary vein (9) for a liquid flow inlet and opening downstream from the convergent vein (3), characterised in that the axis (zz') of the cylindrical vein (5) is angularly offset relative to the longitudinal axis (xx') of the convergent (3) and divergent (5) veins. The invention also relates to injection devices and to mist generation apparatuses using such an injector.
Owner:格罗斯特欧洲公司
Magnetic cyclodextrin-based chelated decolorization adsorption material and preparation method thereof
ActiveCN110115982AImprove adsorption capacityGood decolorization effectOther chemical processesWater contaminantsAutomatic controlSorbent
The invention discloses a magnetic cyclodextrin-based chelated decolorization adsorption material and a preparation method thereof. According to the material, cyclodextrin, epichlorohydrin and polyethylene polyamine are used as raw materials, dialdehyde is used as a crosslinking agent, core-shell type polymer microspheres which are coated with active polymer layers with abundant hydroxyl groups, amino groups and imino groups are synthesized online in the presence of ferroferric oxide microspheres through a reversed-phase microemulsion method, and then the core-shell type polymer microspheres react with carbon disulfide in the presence of an alkali to modify the surfaces of the polymer microspheres with dithioformyl-CSS-. The obtained adsorption material has an excellent capability of removing heavy metal ions and organic pollutants, a great decolorizing capability and good magnetic separation performance and overcomes the defects that traditional adsorbents are poor in heavy metal-organic matter composite pollutant disposal effect, low in efficiency and high in cost, disposal water is colored, it is difficult to separate materials after adsorption, and the operation is tedious. Heavy metal and organic pollutants in wastewater can be efficiently removed synchronously, and automatic control over a decolorizing and adsorption process and operation continuity are realized.
Owner:HUNAN UNIV OF SCI & TECH
Image-processing device and method
ActiveCN103563374ASuitable for removalImage codingDigital video signal modificationFilter tuningImaging processing
Owner:SONY GRP CORP
Highly visible cartridge having improved retainer
InactiveCN1833615ASuitable for removalImprove visibilityDiagnosticsWound clampsEngineeringSurgical Clips
Owner:泰里福来克斯医学公司
Rust removal activating agent solution as well as preparation and use methods thereof
The invention provides a rust removal activating agent solution which is characterized by comprising the following components in percentage by weight: 15-40% of sulfuric acid, 2-20% of hydrochloric acid, 5-25% of potassium monopersulfate, 0.1-1% of fatty alcohol polyoxyethylene ether and the balance of water. The rust removal activating agent solution has the advantages of little hazard, wider applicability and high rust removal activating speed.
Owner:JIANGSU XIYAN SEMICON TECH
Seven-degree-of-freedom water jet cutter
PendingCN107214630ASuitable for processingSuitable for removalAbrasive machine appurtenancesAbrasive blasting machinesEngineeringWater jet cutter
The invention provides a seven-degree-of-freedom water jet cutter. The seven-degree-of-freedom water jet cutter comprises a shell, wherein a base is arranged at the bottom of the shell, and a rotary workbench and a support are arranged on the base; a protection device is arranged on the inner wall of the shell, and a small sand tank is arranged at one end of the outer side of the shell; a robot is arranged on the support; and the shell is externally connected with a cold water machine, a high-pressure pipeline device, a large sand tank, an electric part control cabinet and an operation table. According to the seven-degree-of-freedom execution mechanism, parts with complex curved surfaces can be machined; the rotary workbench is arranged, so the water jet cutter is particularly suitable for machining blade-disc parts; water jet flow and abrasive materials are mixed for cutting, so the water jet cutter is suitable for the large allowance removal of materials such as titanium alloy and high-temperature alloy which are difficult to machine; and the cutting media are the water and the abrasive sand, so that no regeneration stress and notch sintering are generated, and the machining of subsequent processes is facilitated.
Owner:贵州航谷动力科技有限公司
Preparation and application for straw cellulose/graphene oxide composite material
InactiveCN110339819AReduce manufacturing costReduce preparation energy consumptionOther chemical processesWater contaminantsCelluloseDissociative adsorption
The invention relates to a preparation method and an application for a straw cellulose / graphene oxide composite material. The preparation method is to compound straw cellulose / graphene oxide. The application refers to the application in wastewater treatment. The method for the application comprises the following steps: adjusting a pH value of wastewater to 2 to 8, adding the straw cellulose / graphene oxide composite material, carrying out shaking at a room temperature for 30 to 120 min, and centrifuging an obtained solution so as to obtain purified wastewater. The adsorption material provided by the invention has simple preparation method, mild experimental conditions, low cost and energy consumption, good adsorption effect on heavy metal ions, and high wastewater treatment efficiency; andthe composite material has high reutilization efficiency and is free secondary pollution after dissociative adsorption.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for preparing photocatalytic composite modified molecular sieve
InactiveCN107899604AHigh solid contentImprove catalytic performanceMolecular sieve catalystsAnhydrous ethanolMolecular sieve
The invention discloses a method for preparing a photocatalytic composite modified molecular sieve. The photocatalytic composite modified molecular sieve is prepared from tetrabutyl titanate, anhydrous ethanol, an alkaline solution, sodium metaaluminate, water glass and silver nitrate. Suction filtration is carried out to prepare semi-dry gel, and the semi-dry gel is used to produce the molecularsieve, so the solid content of a reaction kettle is improved, and the energy consumption in the production of per unit mass of the molecular sieve is reduced; the molecular sieve is modified with alkali, and the abundant meso-porous structures are introduced to the molecular sieve mainly based on micro-pores, so the load capacity of titanium dioxide is greatly improved; and a rich adsorption surface is used to increase the contact area of the titanium dioxide and pollutants, so the photocatalysis effect is efficiently completed, and the photocatalytic degradation of the pollutants is realized.
Owner:MAANSHAN TUORUI METAL SURFACE TECH
Carbonate eater high-molecular polymer two-stage indirect drying system and drying process
ActiveCN107685404AEasy disposalSmall amount of gasGranular material dryingDrying gas arrangementsExhaust fumesExhaust gas emissions
The invention relates to a carbonate eater high-molecular polymer two-stage indirect drying system. The system comprises a paddle dryer, a steam pipe dryer and an alkali washing tower. The paddle dryer is provided with a feed port, a tail gas exhaust port, a second-grade dried tail gas input pipe, saturated steam input pipes I and II, steam condensed liquid discharge pipes I and II, and a dried material discharge port; the tail gas exhaust port is connected with a cloth bag dust remover I; the alkali washing tower is connected with a water sealing tank, and is provided with a spraying pipe, awaste gas exhaust pipe I and a waste water discharge pipe; the dried material discharge port is connected with a cloth bag dust remover II; one end of the steam pipe dryer is connected with a feedingcyclone, and a saturated steam input pipe III, a steam condensed liquid discharge pipe III, a product discharge pipe and a steam inlet are arranged at the other end; the steam inlet is connected witha steam heater and the second-grade dried tail gas input pipe; and the steam heater is provided with the saturated steam input pipe III and a steam condensed liquid discharge pipe IV, and one side isconnected with a fine filter and a rough-effect filter. The invention further discloses a drying process of the system. The system is excellent in drying effect and free of pollution.
Owner:TIANHUA INST OF CHEM MACHINERY & AUTOMATION
Forming process for low-temperature NOx rapid alternate adsorption-regeneration catalyst
PendingCN112121872AImprove permeabilityAvoid cloggingOrganic-compounds/hydrides/coordination-complexes catalystsDispersed particle separationFiberPtru catalyst
The invention relates to a catalyst forming technology for removing nitric oxide in flue gas, and particularly discloses a forming process for a low-temperature NOx rapid alternate adsorption-regeneration catalyst. The forming process comprises the following steps: dissolving soluble copper salt or / and cobalt salt, soluble cerium salt, other metal salt, citric acid or / and propylene glycol and a pore-forming agent in water, fully stirring, drying, carrying out extrusion forming, crushing to obtain raw catalyst particles, and roasting to prepare a composite metal oxide catalyst; extruding the fiber paper into a wave shape, coating the fiber paper with alumina sol or silica gel, and drying; dispersing the catalyst into the aluminum sol, and brushing the catalyst onto the surface of the fiberpaper; and stacking the fiber paper at intervals to form multiple layers of corrugations, and drying to obtain the product. According to the forming process, the good permeability of the porous catalyst is utilized to prevent flue gas from blocking catalyst pore channels when the flue gas flows through the catalyst, the catalyst can be effectively promoted to adsorb NOx in the flue gas, and the NOx adsorption efficiency of the catalyst is improved.
Owner:QILU UNIV OF TECH +1
Preparation method and application of magnetic composite arsenic adsorbent
ActiveCN102941057BMild preparation conditionsLow costOther chemical processesAlkali metal oxides/hydroxidesSorbentMagnetite Nanoparticles
Owner:PEKING UNIV
Ballast water treatment system
InactiveCN108686419ASuitable for removalAuxillariesSelf-bailing equipments/scuppersForeign matterWater discharge
Provided is a ballast water treatment apparatus capable of properly clearing away foreign matter settling at the bottom of a filter. The ballast water treatment apparatus is equipped with a filter formed to be cylindrical, a water discharge pipe part configured at the position aligned at a central shaft of the filter and internally equipped with a space for water circulation, a nozzle part and a bottom nozzle part. The base end side of the nozzle part is connected to the water discharge pipe part and the front-end side is configured at the position closing to or abutting against the inner peripheral surface of the filter and opened. Water can circulate from the front end to the base end side. The bottom nozzle part is arranged at the lower part of the filter. The front-end side of the bottom nozzle part is opened towards the bottom of the filter. Water can circulate from the front-end side to the water discharge pipe part.
Owner:MIURA COMPANY LIMITED
Method for cleaning treatment of high-ammonia-nitrogen wastewater containing metal ions
ActiveCN108002581AImprove processing efficiencyTo achieve the purpose of removing metal ionsWater contaminantsTreatment involving filtrationIonChemistry
A method for cleaning treatment of high-ammonia-nitrogen wastewater containing metal ions includes the following steps: 1) adding a mixed alkali into the wastewater, adjusting the pH of the wastewaterto be weak alkaline, and making metal ions form a precipitate; 2) adding a flocculant into the wastewater of the step 1), making the precipitate settled, and filtering, to obtain a filtrate and a filter residue; 3) transferring the filtrate into a tubular mixer, adding an alkaline solution, adjusting the pH of the filtrate in the tubular mixer to be strong alkaline; and 4) allowing the strong alkaline filtrate to pass through a fine filter system, and then transferring into a membrane absorption system, and removing ammonia. The invention provides the method for cleaning treatment of the high-ammonia-nitrogen wastewater containing the metal ions. The method has the advantages of clean treatment, simple operation and high treatment efficiency.
Owner:ZHONGYE-CHANGTIAN INT ENG CO LTD
A kind of preparation method and application of magnetic graphene oxide composite material
ActiveCN105381784BEasy to makeEasy to operateOther chemical processesWater contaminantsCross-linkFiltration
Owner:SUZHOU UNIV OF SCI & TECH
A New Method for Removing Rare Earth Elements from Spent Fuel
ActiveCN105195328BSuitable for removalReduce the risk of proliferationFlotationRare-earth elementAlkane
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI +1
Standing-free dynamic membrane formation method and device
InactiveCN106517542AEasy to operateReduce restrictionsTreatment with aerobic and anaerobic processesSustainable biological treatmentFlocculationWater flow
The invention provides a standing-free dynamic membrane formation method and device. The method comprises the steps that a flocculating agent and a coagulant aid are added into sewage, precipitated pollutants form big flocculations by combining the hydraulic condition, and a standing-free dynamic filter membrane is formed in the device. The device comprises a water distributor, a taper hopper and a straight cylinder which are connected in sequence from bottom to top, a water inlet pipe is arranged on the water distributor, a big opening of the taper copper faces upwards, the straight cylinder is provided with a collecting pipe and a water outlet pipe, and the height of the water outlet pipe is higher than that of the collecting pipe; to-be-treated sewage is fully mixed with medicament to enter the water distributor through a water inlet pipe, and the medicament comprises the flocculating agent and the coagulant aid. According to the standing-free dynamic membrane formation method and device, limitation of environment or inflow water quality or inflow water flow velocity on the dynamic membrane is reduced to the minimum, and meanwhile preparation operation of the dynamic membrane is greatly simplified, and the investment cost is lowered.
Owner:天津东风节能环保科技有限公司
Method for preparing biological activated carbon from tomato and eggplant straw mixture
InactiveCN110683539AImprove adsorption capacityLarge specific surface areaCarbon compoundsBiotechnologyBiological activated carbon
The invention belongs to the technical field of biological activated carbon preparation, and provides a method for preparing a biological activated carbon from a tomato and eggplant straw mixture. Themethod comprises the following steps: cleaning, pulverizing and mixing eggplant straw and tomato straw, soaking and activating with pyrophosphoric acid, carbonizing in a tubular furnace, recovering pyrophosphoric acid, rinsing, dehydrating, drying and pulverizing to obtain the biological activated carbon. The preparation process is simple, the production cost is low, the efficiency is high, and the prepared biological activated carbon is high in adsorption capacity and suitable for removing macromolecular harmful pollutants.
Owner:WEIFANG UNIV OF SCI & TECH
Preparation method of high-purity garlic trithiodipropylene
ActiveCN106631940AReduce contentEasy to separateOrganic chemistryOrganic compound preparationAlcohol freeDistillation
The invention provides a preparation method of high-purity garlic trithiodipropylene. The method comprises the following steps that garlic is peeled and crushed, and is put into the air for 10 to 15 minutes; the garlic volatile oil is extracted by a wet distillation technology; the garlic volatile oil is added into a C18 or C8 chromatographic column, and is eluted by a methyl alcohol-water solution to obtain a methyl alcohol-water solution of the garlic trithiodipropylene; the methyl alcohol-water solution of the garlic trithiodipropylene with the purity being greater than 90 percent is collected; the collected methyl alcohol-water solution of the garlic trithiodipropylene is extracted in three times by injection soybean oil or corn oil; garlic trithiodipropylene oil solution is obtained; the garlic trithiodipropylene oil solution is extracted by water; the extraction is performed for three times; the methyl-alcohol-free garlic trithiodipropylene oil solution is obtained. The method has the advantages that the natural garlic oil with high purity can be provided for oil injection or other preparations. The method provided by the invention is also suitable for the removal of the chloropropene removal from the garlic trithiodipropylene, and the high-purity trithiodipropylene prepared by the method is suitable for medical use.
Owner:HENAN UNIVERSITY
Waste ring-pull can surface paint remover and preparation method and application thereof
ActiveCN106752293AAvoid secondary damageSuitable for removalChemical paints/ink removersPhytic acidPhosphoric acid
The invention relates to a waste ring-pull can surface paint remover and a preparation method and application thereof, and belongs to the technical field of paint removing. The paint remover is formed by taking sulfuric acid as a base solution and then compounding with other inorganic acids, a surfactant and an additive, wherein other inorganic acids include phytic acid and phosphoric acid; the surfactant is one of fluorocarbon, fatty alcohol-polyoxyethylene ether and nonylphenol polyoxyethylene ether; and the additive is one of lauryl sodium sulfate, sodium n-alkyl benzene sulfonate and triethanolamine. Compared with other organic waste pull-ring can paint removers, the paint remover disclosed by the invention has the advantages of being low in toxicity, low in volatilization, little in environment influence, and safe in use.
Owner:CHANGZHOU XIAOGUO INFORMATION SERVICES
Hydrophobic efficient VOC molecular sieve adsorbent and preparation method thereof
PendingCN114405460AImprove adsorptionImprove regeneration efficiencyGas treatmentOther chemical processesVolatile organic compoundChemistry
The invention relates to the technical field of adsorbents and preparation thereof, in particular to a hydrophobic efficient VOC (volatile organic compound) molecular sieve adsorbent and a preparation method thereof, and provides the following scheme aiming at the problems that an existing adsorbent and a preparation technology thereof still have low regeneration efficiency and the adsorption capacity is obviously reduced after the adsorbent is repeatedly used for multiple times. The preparation method of the hydrophobic high-efficiency VOC molecular sieve adsorbent comprises the following steps: S1, raw material preparation, S2, mixing and stirring, and S3, roasting and desorption, and aims to prepare the hydrophobic high-efficiency VOC molecular sieve adsorbent by taking a ZSM-5 molecular sieve as a base material, adopting a physical mixing mode, adding molecular sieves of other models, regulating the silica-alumina ratio of the molecular sieves and the like. The high-efficiency VOC adsorbent is obtained, the adsorbability to benzene series is improved, the adsorbability to water is reduced, the adsorbent is very suitable for removing industrial organic waste gas, meanwhile, low-temperature desorption is adopted, the regeneration efficiency of the adsorbent is high, and the adsorption is not obviously reduced after the adsorbent is repeatedly used for multiple times.
Owner:JIANGXI BAOAN NEW MATERIAL TECH
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