229results about How to "Reduce ion concentration" patented technology

A highly reliable semiconductor display device is provided. The semiconductor display device has a channel forming region, an LDD region, and a source region and a drain region in a semiconductor layer, and the LDD region overlaps with a first gate electrode, sandwiching a gate insulating film.

A high reliability semiconductor display device is provided. A semiconductor layer in the semiconductor display device has a channel forming region, an LDD region, a source region, and a drain region, and the LDD region overlaps a first gate electrode, sandwiching a gate insulating film.

The present invention is directed to a biocidal water treatment composition, water treatment apparatus, and method of treating water to reduce levels of pathogens. The composition contains sources of copper, zinc, and silver metal ions within a crosslinked polymer matrix. Examples of these ion sources include copper sulfate, zinc sulfate, and silver nitrate. An example of the crosslinked polymer matrix is crosslinked chitosan, which also serves to clarify the water and release the metal ions over time. The product is easy to manufacture, and allows the use of decreased halogen sanitizer, as well as decreased copper ion, thereby decreasing the likelihood of staining. The product simultaneously provides good bactericidal and algaecidal properties, despite low levels of copper ion and low chlorine levels.

The invention discloses a method for preparing a hydroxyapatite / nano silver antibacterial composite coating through pulse electrochemical deposition, which comprises: using a calcium salt, phosphate, silver nitrate and a proper amount of coordination agent to prepare electrolyte with certain concentration and pH value, and performing electrodeposition in a electrolytic cell provided with a three-electrode system; taking a saturated calomel electrode as a reference electrode, a platinum sheet as a counter electrode and biological medical metal to be coated as a working electrode, wherein the pulse high electric potential is 0 volt, the pulse low electric potential is -2.0 volts, the pulse width is 100 seconds, and the deposition time is 2 hours; and depositing compositions in the coating on a base material in a mode of ions, uniformly dispersing nano silver generated during deposition in the composite coating, and finally preparing the hydroxyapatite / nano silver antibacterial compositecoating.

The disclosed process for rejuvenation treatment of a photoresist development waste mainly containing a photoresist and tetraalkylammonium (TAA) ions comprises at least a simple membrane separation step of treating the photoresist development waste or a treated solution derived from the photoresist development waste with a nanofiltration membrane (NF membrane) to obtain a concentrate (NF concentrate) mainly containing impurities such as the photoresist and a higher-purity permeate (NF permeate) mainly containing TAA ions. The NF concentrate and / or the NF permeate, preferably the NF permeate, is desirably subjected to a step of concentration and refining by electrodialysis or electrolysis and / or a step of refining by ion exchange treatment, for example, with an anion exchange resin and / or a cation exchange resin in one of the H form and the TAA form. The NF permeate may advantageously be passed through the concentrating cells of an electrodialysis unit while passing the NF concentrate through the desalting cells of the electrodialysis unit to further recover TAA ions remaining in the NF concentrate, whereby the amount of wastewater discharged as the desalted waste can be decreased. The NF membrane separation step is preferably effected in multiple stages.

Production of inorganic polymer coagulating agent is carried out by controlling Fe2+ concentration between 75-90g / L in hydrochloric acid pickling effluent, taking it as ferric source, taking calcium aluminate powder as aluminum source with Al2O3 content 47-56 wt%, putting two kinds of raw material into reactor in proportion of calcium aluminate powder: hydrochloric acid pickling effluent=0.05-0.10, reacting while agitating at 50-80 degree for 1-3 hrs, adding into minor chlorate oxidant and phosphate stabilizer, heating, reacting while agitating, and cooling to room temperature to obtain final product. It's simple and can be used for domestic sewage and industrial effluent treatment.

Chlorine dioxide is produced at high conversion rates from aqueous sodium chlorite solution by electrochemical oxidation in an undivided electrochemical cell. The cell utilizes an anode of high surface area through which the aqueous sodium chlorite solution flows into an interelectrode gap between the anode and a cathode. Water or acidified water is fed into the interelectrode gap to function as catholyte and also to dilute the electrolyzed sodium chlorite solution to provide an aqueous solution of chlorine dioxide exiting from the electrochemical cell.

The invention provides a hexagonal boron-nitride material, a preparation method and application of hexagonal boron-nitride material. The hexagonal boron-nitride material is of an assembling structure consisting of porous boron-nitride whiskers and porous boron-nitride piece layers, or a porous boron-nitride whisker structure distributed with mesopores and macropores and with the specific surface area reaching 420m<2> / g. The preparation method comprises the following steps: (1) adding boric acid, melamine and optional surface active agent into water, mixing, heating, adjusting pH value of solution to be 3-11, crystallizing, and separating solid and liquid to obtain precursor; and (2) carrying out two-section type calcining reduction on the precursor in the step (1) under the atmosphere of ammonia gas or the mixed atmosphere containing the ammonia gas to obtain the hexagonal boron-nitride material. The hexagonal boron-nitride material can be used as an absorbing agent for absorbing metal ions and / or organic matters. The invention also provides a cyclic regeneration method of the hexagonal boron-nitride material. The hexagonal boron-nitride material is an excellent absorbing agent, is excellent in absorbing performance and cyclic regeneration performance, and has good application prospect in the field of water treatment.

This static electricity and dust removing apparatus has a base box (11) provided with an airflow inlet port (16), and a processing head (23) attached to the base box (11) through a support column (21), wherein a processing space (24) is formed between the airflow inlet port (16) and the processing head (23). Air curtains for isolating the processing space (24) from the outside due to air from a spout of an air spout pipe (33) are formed at a front opening portion (29) and right and left side opening portions (28) of the apparatus. Ionized air generated by an ion generator (42) is spouted into the processing space (24), so that the ionized air is sprayed on matters to be processed which are disposed in the processing space (24) and dust is removed from the matters to be processed. Thereby, a static electricity and dust removing operation to the dust adhering to the matters to be processed can be efficiently performed within a short time, and work environment can be prevented from being contaminated due to a leakage of the removed dust.

The invention relates to the field of medical wastewater treatment, particularly a medical wastewater three-stage treatment technique which comprises the following steps: a primary macroscopic impurity removal technique is performed, wherein the primary macroscopic impurity removal technique comprises sedimentation tank treatment, precipitation tank treatment and regulating tank treatment, and is used for macroscopic impurity removal; medical wastewater after the primary macroscopic impurity removal technique enters a secondary microscopic impurity removal technique, wherein the secondary microscopic impurity removal technique comprises water softener tank treatment, hydrolysis-acidification tank treatment, aeration biological tank treatment, electrolysis cell treatment and MBR (membrane bioreactor) tank treatment, and is used for microscopic impurity removal; and medical wastewater after the secondary microscopic impurity removal technique enters a tertiary disinfection discharge technique, wherein the tertiary disinfection discharge technique comprises secondary sedimentation tank treatment, disinfection tank treatment and discharge, and is mainly used for sterilizing and disinfecting the wastewater. The technique can remove different pollutants in the medical wastewater by using different treatment processes, and can implement efficient purification on the medical wastewater.

Disclosed is a vinyl polymer powder which is superior to dispersibility to curable resin compositions, which immediately gives a gel state for curable resin compositions by short-time heating with predetermined temperature, which is with high ion concentration, and which is useful as a pre-gel agent suitable for fields of electronic materials, to provide a curable resin composition comprising the vinyl polymer powder, and to provide a cured substance of the curable resin composition. The vinyl polymer powder of the present invention has an acetone-soluble component of 30% by mass or more, mass average molecular weight of the acetone-soluble component of 100,000 or more, a content of an alkali metal ion of 10 ppm or less, and a volume average primary particle size (Dv) of 200 nm or more.

The invention discloses a method for synthesizing super absorbent resin containing phosphorus and nitrogen by the graft copolymerization reaction of potato starch organic phosphate, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; respectively mixing potato starch organic phosphate and acrylamide with de-ionized water to obtain a potato starch organic phosphate solution and an acrylamide solution; mixing the prepared acrylicacid and the sodium salt solution with the potato starch organic phosphate solution and the acrylamide solution; adding an evocating agent persulfate; stirring the mixture for 0.5-1.0 hour to ensure that the mixture is uniformly mixed; heating the mixture by water bath and stirring under the protection of nitrogen; stopping stirring when reaching certain temperature; keeping the temperature for 1-2 hours in boiling water bath; stopping supplying nitrogen, taking the product out, and cutting the product into small pieces; drying the small pieces in a baking oven to keep constant weight, and crashing to obtain the super absorbent resin containing phosphorus and nitrogen. Compared with the similar products, the water absorption of the super absorbent resin is greatly enhanced; the super absorbent resin contains the nutrition elements of nitrogen and phosphorus, does not need pasting in comparison with the process of directly using starch and greatly improves the preparation process. The super absorbent resin has favorable development prospect in agriculture management, such as desert greening, water conservation, soil improvement, seedling transplantation and the like.

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method and a device for treating phosphorus wastewater by adopting a multi-electrode baffling electric flocculation process. The PH value of wastewater is regulated with alkaline liquor to 7.0-8.0; the regulated wastewater is pumped into an electric flocculation tank through a peristaltic pump, is subjected to electrolytic flocculation treatment through the baffling of a multi-electrode under the condition of aeration, and then is discharged through an overflow launder, the discharged water is collected and left to stand for 30 minutes, a liquid supernatant is discharged, a floc is recycled; a power supply of the electric flocculation tank is a direct current power supply, the current density is 1.27-5.08mA / cm<2>, and the electrolysis time is 2 minutes to 48 hours. The technical characteristics are as follows: the wastewater baffles along the multi-electrode, then the short stream of the wastewater is avoided, the chance of enabling a pollutant in the wastewater to be in contact with a high-concentration flocculating agent in an electrolysis plate is increased, the flocculent precipitation is promoted, so that the pollutant treatment effect is improved. The multi-electrode baffling electric flocculation process is suitable for treating inorganic phosphorus wastewater at medium and low concentrations, needed equipment is simple, easy in operation and low in cost, and runs stably, so that the process is an electrochemistry phosphorous removal process having a high potential.

The invention discloses a method for comprehensively recovering acid and valuable metals from waste water of oxalic acid, comprising the steps: neutral phosphorus type extracting agent is used for extracting the oxalic acid, and then de-ionized water is used for back extracting the oxalic acid from the washed organic phase; the obtained diluted oxalic acid solution is concentrated and crystallized to obtain oxalic acid crystal; after the oxalic acid is extracted, acid solution is adjusted by chloride or chlorine hydride solution to ensure the concentration of chloridion to be not less than 3.0mol / L; valuable metallic ions are extracted out of the acid solution with the adjusted concentration of chloridion by polymer amine extracting agent, and the valuable metals is back extracted out from the washed organic phase by using dilute hydrochloric acid or dilute sulphuric acid solution. The method leads the recovery rate of the oxalic acid in the waste water of oxalic acid to be more than 95%, the recovery rate of valuable metals be more than 95%, the oxalic acid content of the recovered oxalic acid crystal to be more than 99.5%, the oxalic acid content of the inorganic acid to be less than 0.2g / L and the concentration of the valuable metallic ion to be less than 0.05g / L. The method can realize the comprehensive recycling of various valuable materials in the waste water and zero emission of waste water.

The invention belongs to the technical field of polymer materials, and especially relates to a polyaryl ether nitrile resin and an industrialized synthetic method thereof. The structural unit of the polyaryl ether nitrile resin is one of units shown in the specification, and the crystallinity degree of the polyaryl ether nitrile resin is 28-38%. The polyaryl ether nitrile resin prepared by the invention is high in purity and high in crystallinity degree (28-38%); the glass transition temperature is 150-180 DEG C, the melting point is 310-355 DEG C, and the initial decomposition temperature is more than 450 DEG C; the resin has higher mechanical strength, the tensile strength is 100-120Mpa, the tensile modulus is 2.4-3.6GPa, and the bending strength is 100-140Mpa; and therefore, the polyaryl ether nitrile resin prepared by using the method disclosed by the invention can be applied to the fields such as aerospace, electronics, machinery, medical treatment, chemical engineering and the like.

The invention discloses a method for ecologically producing alcohol by taking a tuberous crop as a raw material. The method comprises the following steps of: grinding the tuberous crop raw material; adding biogas slurry into the ground tuberous crop raw material according to a specific material-to-liquid mass ratio and mixing; adding liquefying enzyme, heating, boiling and liquefying; cooling, adding saccharifying enzyme and inoculating yeast for direct fermentation; and after fermentation is finished, distilling so as to obtain the alcohol. Processes such as two-stage marsh gas fermentation, solid and liquid separation, degassing and the like are performed on distilling waste liquor so as to obtain byproducts such as distilled grains, marsh gas, sludge and the like and the biogas slurry is recycled in a mixing process. In the method, a microorganism ecological food chain comprising alcohol yeast, marsh gas bacteria and the like is constructed, so that the dual-fermentation coupling of the alcohol and the marsh gas is realized, aeration treatment with large floor area and high operating cost is eliminated and the problem of pollution caused by high-concentration waste water produced by the conventional fermentation alcohol production is solved.

The invention relates to the field of concrete engineering, in particular to a microbial microcapsule anti-sulfate erosion system of structural concrete. The invention provides the microbial microcapsule anti-sulfate erosion system of underground structural concrete, which comprises a concrete matrix and microbial microcapsules inside the concrete matrix, wherein sulfate reducing bacteria and culture media suitable for the growth of the sulfate reducing bacteria are coated inside the microbial microcapsules. Compared with the prior anti-sulfate erosion method, the microbial microcapsule anti-sulfate erosion system provided by the invention has the following advantages that the intelligent control of the sulfate concentration can be realized, and the sulfate erosion degree is reduced; sulfur precipitants can be generated simultaneously with the reduction of the concentration of sulfate ions to block sulfate erosion passageways; the microcapsules can protect the internal microorganisms and culture media from the effects of the external environment, so the anti-sulfate erosion capability of the microorganisms and the culture media is effective for a long time; and large-range restoring can be realized.

Means for reducing an arsenic ion concentration in the solution to the degree of ultra trace amount are provided. Ammonium molybdate is supported by a nanostructure material by mixing the nanostructure material, which is obtained after the nanostructure material such as an alumina reacts with a surfactant, in the solution containing the ammonium molybdate. The nanostructure material supporting an arsenic ion adsorption compound such as ammonium molybdate can selectively adsorb and remove trace of arsenic ion in the solution by a room temperature treatment without a water conditioning such as pH control. In our removal system of arsenic, extra posttreatments are not needed because special pretreatments are not carried out, and special heating equipments are not used. Accordingly, our removal system of arsenic can be constructed at low cost. Furthermore, it can supply an arsenic-free solution by be constructed at multi stages.

The invention relates to a method and equipment for dewatering municipal sludge with high dryness. The method comprises the following steps: putting to-be-treated sludge in a sludge treatment machine, and mixing and stirring with ferric sulfate or polymerized ferric sulfate; adding quick lime, and keeping on mixing and stirring to obtain treated sludge having neutral pH; and starting a feed pump of a filter press, pumping the treated sludge in the high-pressure diaphragm frame filter press, squeezing to obtain dewatered sludge cake, opening a filter plate, and delivering the dewatered sludge cake on a belt conveyer to the outside. The equipment comprises the sludge treatment machine, a sludge inlet pipe, the feed pump of the filter press, the high-pressure diaphragm frame filter press, a squeezing water pump, a squeezing water tank and the belt conveyor. According to the method, the dewatered sludge cake has a water content of less than 60 percent, has good ventilation after being ground, is suitable for growth and reproduction of microorganisms, can be directly subjected to aerobic fermentation, can be used for directly realizing reduction, harmlessness and resource of sludge, and is beneficial to sustained development.

The invention relates to a method for treating heavy metal-containing pollutant wastewater. The method comprises the steps of bacteriorhodopsin culture, culture of heavy metal ion resistant bacteria, heavy metal ion-containing wastewater treatment and the like. The method provided by the invention is advanced, short in process flow, simple in operation and low in cost; compared with the prior art, the cost is reduced by 20-30%; the method is capable of effectively reducing the concentration of heavy metal ions in the wastewater and greatly reducing the quantity of heavy metals in outlet water and also capable of realizing industrial treatment; and therefore, the method is a quite ideal heavy metal-containing wastewater treating method.

An ultralow-hydrogen iron powder coated welding electrode for the high-strength low-alloy steel is composed of welding wire H08A or H08E and the coated layer prepared portionally from Fe powder, CaCO3, CaF2, Ti-Fe, feldspar, Mn powder, Ni powder, Cr-Fe, NaCO3 and sodium-water glass as adhesive.

The invention belongs to the technical field of water treatment, and in particular relates to a treatment process and device of industrial wastewater containing heavy metal ions. The treatment process and device comprise two parts namely an enhanced pre-treatment process and device and an adsorption treatment process and device, wherein the enhanced pre-treatment device comprises a raw water bucket, a reaction sedimentation tank and a filter tower which are connected with one another in sequence; the adsorption treatment device comprises a middle water tank, an adsorption tower and a clean water tank which are connected with one another in sequence. A filter material in the filter tower consists of quartz sand, anthracite, cobblestone, activated carbon, or zeolite; and a filling material in the adsorption tower is a hydrogel adsorption material. The treatment process and device disclosed by the invention have the advantages that a polymer hydrogel adsorbent and a fixed bed technology are adopted for effectively reducing the concentration of the heavy metal ions in a water body; and the adsorbed hydrogel is desorbed by using acid liquor to recycle the adsorption materials and reduce the wastewater treatment cost. The device disclosed by the invention is simple in structure and occupies a small space; the equipment is compact and simple and easy to operate so as to ensure high water quality and stability of effluent.

A cheaper composite inorganic-organic flocculant for treating sewage or fresh water is prepared from inorganic salt (Al salt or Fe salt), starch and alkali through proportioning, pretreating starch and inorganic salt, and synthesizing reacting. Its advantages are low cost, high effect and no secondary pollution.

The invention discloses polyacrylate latex subjected to suspension graft copolymerization with vinyl chloride. The polyacrylate latex has a core-shell structure, and comprises the following components in parts by weight: 10 to 90 parts of core monomer, 10 to 90 parts of shell monomer, 0.5 to 1.5 parts of crosslinker, 0.2 to 1.0 part of azobis(nitrile) initiator or inorganic peroxide initiator and 3 to 8 parts of complex-type emulsifier. The combined emulsifier and initiator formula is used to synthesize the polyacrylate latex with the core-shell structure, the ion concentration is low, and the polyacrylate latex can be directly subjected to the suspension graft copolymerization with the vinyl chloride without separating and drying to produce a high-impact PVC (polyvinyl chloride) special compound.

The invention discloses a method for recycling nickel, buffer salt and water from chemical nickel-plating ageing solution. The method comprises the following steps: 1) filtering the ageing solution by virtue of a filter; 2) carrying out electrolysis treatment on the chemical nickel-plating ageing solution; 3) heating the ageing solution by utilizing a heat exchanger, enabling the ageing solution to enter a low temperature vacuum evaporation concentrator to be evaporated and concentrated, so that phosphate and sulfate are crystallized; 4) enabling condensation water to sequentially pass through a reverse osmosis membrane, an ion exchange filter and a porous medium adsorption filter to be filtered and recycled as production water supply; and 5) enabling mixed liquor after crystallization to enter a crystallization fluidized bed to be separated, so that mixed crystals of sulfate and phosphate are obtained, removing crystal salt particles in effluent by virtue of a security filter, then recycling to an electrolytic tank, and carrying out secondary recycling on residual nickel. The method disclosed by the invention can realize complete recycling of metal nickel, dissolved salt and water in the chemical nickel-plating ageing solution, and pollution of electroplating ageing solution to the environment is reduced to the greatest extent.

The invention provides a liquid crystal composition with the high reliability and application thereof. The liquid crystal composition is prepared from, by weight, 5-40 parts of a compound represented by the general formula I (the formula is shown in the description), 20-70 parts of a compound represented by the general formula II (the formula is shown in the description), 1-40 parts of a compound represented by the general formula III (the formula is shown in the description) and 0-30 parts of a compound represented by the general formula IV (the formula is shown in the description). The liquid crystal composition has the high voltage holding ratio, the low ion concentration, the excellent light stability, the appropriate optical anisotropy, the good low-temperature intersolubility, the high elastic constant and the good thermal stability and can effectively solve the reliability problem of a liquid crystal display, effectively solve the residual image problem of the liquid crystal display, improve the display quality of the liquid crystal display and prolong the service life of the liquid crystal display. Therefore, the liquid crystal composition is suitable for high-reliability TN, IPS and FFS type TFT liquid crystal display devices and especially suitable for IPS and FFS type liquid crystal display devices.

The invention provides a preparation method of an ultra-pure and ultrafine silver nanowire. The preparation method comprises the following steps: step 1, an ethylene glycol solution with sodium bromide, an ethylene glycol solution with sodium chloride, an ethylene glycol solution with PVP and an ethylene glycol solution with silver nitrate are prepared, and in the preparation process, moisture inethylene glycol is removed through heating; and step 2, the ethylene glycol is taken, heating is conducted to remove the moisture, the ethylene glycol solution with sodium bromide, the ethylene glycolsolution with sodium chloride, the ethylene glycol solution with PVP and the ethylene glycol solution with silver nitrate which are prepared in the step 1 are added, the temperature is increased to form a nucleus, temperature increasing is reduced, and the ultra-pure and ultrafine silver nanowire is prepared. According to the preparation method, the adsorbed moisture in the ethylene glycol is removed through heating, thus the concentration of hydroxyl plasma in a reaction solution is effectively decreased, seed crystal damage caused by ion etching is reduced, the dynamic process of nucleus forming is adjusted and controlled, the probability that the crystal nucleus grows into the nanowire is increased significantly, and the ultra-pure and ultrafine silver nanowire can be obtained withoutthe need of the subsequent purification process.