184results about "Anion exchangers" patented technology

The invention discloses a human albumin binding peptide 1E3 and application of the human albumin binding peptide 1E3 in promoting purification of human albumin, and belongs to the technical field of polypeptides. The human albumin binding peptide comprises an amino acid sequence as shown in SEQ ID NO. 1; and / or an amino acid sequence of a fusion protein with the same function, which is obtained by connecting tag protein to the N terminal and / or C terminal of the amino acid sequence as shown in SEQ ID NO.1. The human albumin binding peptide has extremely high affinity with human albumin and can be used for separating and purifying a human albumin solution, and the purity of the purified human albumin far exceeds the pharmacopoeia standard and can reach 99.99% or above. The method is good in safety and stable in process, and has a wide application prospect in the aspect of separation and purification of the human albumin.

The invention relates to the technical field of anion exchange membranes, in particular to a dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production and a preparation method of the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production, and the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production is prepared by blending and crosslinking quaternized polyether-ether-ketone and carboxylated polyether sulfone, the carboxylated polyethersulfone provides a cation channel to form a double-ion synergistic conduction structure; the preparation process of the anion exchange membrane comprises the steps of quaternized polyether-ether-ketone synthesis, carboxylated polyether sulfone synthesis, membrane casting solution preparation, tape casting drying, crosslinking treatment and alkali liquor ion exchange. By constructing a double-ion channel structure, the synergistic conduction of anions and cations is realized, and the total ion conduction efficiency of the membrane is remarkably improved. The two polymer components form a continuously interlaced channel network, so that the defect that the conduction path of the traditional single ion channel membrane is isolated is avoided.

The present invention relates to the field of cationic polymers, and in particular, to highly alkali-stable poly(arylene alkylene piperidinium) cationic polymers and preparation methods and applications. The preparation method for the highly alkali-stable poly(arylene alkylene piperidinium) cationic polymers includes the following steps: performing catalytic polycondensation on 1-R6-piperidine-3-carboxaldehyde or a salt or hydrate thereof and an aromatic compound to obtain a polymer having a piperidine moiety; and then further subjecting the polymer to a quaternization reaction to obtain the poly(arylene alkylene piperidinium) cationic polymer. The anion exchange membranes prepared from the piperidinium-based cationic polymers have ultra-high alkaline stability and excellent mechanical properties and ionic conductivities, and can be applied to the fields of electrochemical energy conversion such as fuel cells, hydrogen production by water electrolysis, electrochemical reduction of carbon dioxide, flow batteries, and fields of separation such as electrodialysis and water treatment.

Methods, systems, and devices for PFAS destruction including providing water containing PFAS to a reactor vessel, irradiating the water with UV light under conditions to destroy at least a portion of the PFAS, passing the treated water through a selective membrane to form permeate and membrane reject comprising PFAS, providing the membrane reject back to the reactor vessel, providing additional water containing PFAS to the reactor vessel within the reactor vessel or before being provided to the reactor vessel, and irradiating the membrane reject and the additional water containing PFAS within the reactor vessel with UV light. The steps may be repeated a plurality of times such that PFAS that is not destroyed is recycled through the reactor vessel. Sensitizers may be added and may also be recycled in the membrane reject with the PFAS.

This invention provides an ion exchange apparatus that can achieve excellent utilization efficiency of ion exchange resins in the purification of organic compound salt solutions using ion exchange resins. [Solution] An ion exchange apparatus for purifying an organic compound salt solution, comprising a plurality of ion exchange resin layers arranged along the flow direction of the organic compound salt solution, wherein each of the plurality of ion exchange resin layers is formed of either a cation exchange resin or an anion exchange resin, the plurality of ion exchange resin layers are separated from each other by spaces not filled with ion exchange resin, 1 to 11 such spaces are provided, and the total height of the ion exchange resin layers / the flow channel area of ​​the ion exchange resin layers is 0.2 to 2.5 cm². -1 A device that is.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.

An azulene-based branched poly aryl-piperidine anion exchange membrane and a preparation method thereof are provided. The exchange membrane includes an azulene-based branched poly aryl-piperidine polymer with a following structure:The preparation method includes: preparing an azulene-based branched poly aryl-piperidine precursor; preparing a cationic azulene-based branched poly aryl-piperidine; preparing the azulene-based branched poly aryl-piperidine anion exchange membrane.

A method of making a material for capturing carbon dioxide from the earth's atmosphere, comprises producing an acid and a base with an electrochemical acid-base generator; dissolving a mineral in the acid to produce a mineral rich solution, separating silica from the mineral rich solution to form a silica depleted solution; adding a first portion of the base to the silica depleted solution to remove impurities by precipitation, adding a second portion of the base until ferrous hydroxide (Fe(OH)2) precipitates, then pausing base addition and removing the ferrous hydroxide precipitate from the solution. Then adding a third portion of the base to the iron-depleted solution to precipitate magnesium hydroxide (Mg(OH)2) and / or calcium hydroxide (Ca(OH)2). Then recovering a salt solution and directing the recovered salt solution to the electrochemical acid-base generator to produce a new acid and a new base. The magnesium hydroxide and / or calcium hydroxide may be used to capture and sequester carbon dioxide from a CO2-containing gas (e.g., air) by forming a carbonate or from the ocean by forming bicarbonate.

The invention relates to an anion exchange membrane containing a composite film of an ionomer and zirconium oxide particles of formula ZrO2, the ionomer being a block polymer of formula (AB)nA, the symbol A representing a polyvinylaromatic block bearing quaternary amine groups, the symbol B representing a hydrogenated block of a poly(1,3-diene) or a copolymer comprising monomer units of a 1,3-diene and a vinylaromatic monomer, n being an integer equal to or greater than 1, the zirconium oxide particle content of the composite film being greater than 40% by mass of the composite film mass, the zirconium oxide particles having a median volume size, D50, greater than 100 nm and less than 1 µm. The membrane exhibits good plasticity.

The present application relates to membrane electrodes, in particular electrolytic cell devices, including novel materials and membrane electrode design and fabrication methods.

Sorbent cartridges having a flow control insert to improve the functional capacity of a sorbent cartridge is provided. Flow control inserts can include a plurality of flow channels filled with sorbent material through which fluid to be regenerated can travel in the sorbent cartridge.

The application discloses a kind of photopolymerization anion exchange membrane and preparation method thereof, belong to ion exchange membrane technical field.Clopropylmethyl styrene, tripropylene glycol dipropyl acrylate and photo initiator are mixed and stirred to obtain casting solution, then the casting solution is coated on glass plate, and the base film is prepared by using ultraviolet irradiation to initiate photopolymerization, then the base film is modified to obtain the required anion exchange membrane.The anion exchange membrane provided by the application can completely avoid the use of organic solvent during preparation, and has significant environmental and economic benefits.Meanwhile, the photopolymerization technology used has the advantages of simple operation, low energy consumption, fast polymerization rate, etc.The prepared anion exchange membrane has excellent desalination performance, and has a large-scale application prospect in the field of electrodialysis seawater desalination.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.

Provided are a composition for forming an anion exchange polymer, the composition including a first monomer represented by Formula A and a crosslinking agent represented by Formula B, an anion exchange membrane including a crosslinked product thereof, and a method of producing an anion exchange membrane. Detailed descriptions of Formulae A and B are provided in the present specification.

To provide a monovalent selective cation exchange membrane, a monovalent selective cation exchange membrane support, a method for producing a monovalent selective cation exchange membrane, a water treatment system using an ion exchange membrane, and a method of facilitating water treatment using an electrochemical separation device.SOLUTION: A monovalent selective ion exchange membrane includes a polymeric microporous substrate, a cross-linked ion-transferring polymeric layer on a surface of the substrate, and a charged functionalizing layer covalently bound to the ion-transferring layer. A method of producing a monovalent selective cation exchange membrane includes: chemically adsorbing a styrene intermediate layer to the cross-linked ion-transferring polymeric layer on a surface of the polymeric microporous substrate; chlorosulfonating the styrene intermediate layer to attach a chlorosulfonyl group layer; aminating the sulfonyl group layer to attach an amine group layer; and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane.SELECTED DRAWING: Figure 2

The present invention aims to provide a polymer having excellent alkali resistance and anion conductivity, a method of producing the polymer, an electrolyte material containing the polymer, and an anion exchange membrane containing the polymer. The present invention relates to a phosphazene bond-containing polymer containing a phosphorus atom constituting a phosphazene bond, the phosphorus atom including a phosphorus atom to which a nitrogen-containing group is bonded, and a nitrogen atom constituting the phosphazene bond, the nitrogen atom including a nitrogen atom to which a hydrocarbon group is bonded.

The purpose of the present invention is to provide a production method for producing an ion-conducting membrane with reduced impurities in a short time. A further purpose is to provide a more compact ion-conducting membrane production device which can reduce the amount of treatment solution used. In order to achieve this purpose, this production method has the following configuration. This method, for producing an ion-conducting membrane that contains a polymer having an ionic group, involves multiple liquid treatment steps in which a precursor membrane is brought into contact with an acid treatment solution or an alkali treatment solution, said precursor membrane containing a polymer in a state in which the aforementioned ionic group forms a salt with an impurity ion, wherein the liquid treatment time in the second and subsequent liquid treatment steps of the multiple liquid treatment steps is shorter than the liquid treatment time in the initial liquid treatment step.

This invention provides a method for preparing a green photopolymerizable anion exchange membrane. The method first dissolves a brominated microporous polymer PIM-Br and a photoinitiator in chloromethylstyrene (VBC) to obtain a yellowish-brown solution. The solution is then cast onto a glass plate and photocured under a nitrogen atmosphere using ultraviolet light. After curing, the membrane is directly immersed in a bis-tertiary amine reagent. The green photopolymerizable anion exchange membrane is obtained through nucleophilic substitution reactions between the bromomethyl group in PIM-Br and the chloromethyl group in VBC and the bis-tertiary amine group. Compared with other methods, the anion exchange membrane preparation method provided by this invention utilizes a free radical polymerization reaction initiated by ultraviolet light irradiation, which has advantages such as short curing time, fast polymerization speed, and no reaction temperature limitation. Furthermore, the use of organic solvents is completely avoided during the preparation process. The prepared anion exchange membrane exhibits excellent electrodialysis desalination performance, resulting in significant economic and environmental benefits.

A low cost, sandwich-structured thin film composite (TFC) anion exchange membrane for redox flow batteries, fuel cells, electrolysis, and other electrochemical reaction applications is described. The sandwich-structured TFC anion exchange membrane comprises a microporous substrate membrane, a first hydrophilic ionomeric polymer coating layer on the surface of the microporous substrate layer, a cross-linked protonated polyamine anion exchange polymer coating layer on top of the first hydrophilic ionomeric polymer coating layer, and a second hydrophilic ionomeric polymer protective layer on top of the cross-linked protonated polyamine anion exchange polymer coating layer. Methods of making the TFC anion exchange membrane comprises a microporous substrate membrane and redox flow battery system incorporating the TFC anion exchange membrane comprises a microporous substrate membrane are also described.

The present disclosure relates to an electroadhesive device, a method for manufacturing the same, and an electrostatic clutch comprising the same, and more specifically, to an electroadhesive device capable of being applied to various fields, such as an electrostatic clutch, by freely controlling electrostatic attraction even at low operating voltages through the application of a polyanionic ionomer and a polycationic ionomer in a heterojunction structure, a method for manufacturing the same, and an electrostatic clutch comprising the same.

Provided are a method for producing an anion exchange resin which is capable of producing an electrolyte membrane with excellent mechanical property (strength).A monomer for forming a hydrophobic group is reacted with a monomer for forming a hydrophilic group in the presence of bis(1,5-cyclooctadiene)nickel(0) as a catalyst, 2,2′-bipyridine as a co-ligand, a bromide or an iodide as a co-catalyst, and a reducing agent to produce an anion exchange resin where the hydrophobic group is connected to the hydrophilic group via direct bond, in which a mole number of bis(1,5-cyclooctadiene)nickel(0) is 0.3 to 1.8 times a total mole number of the monomer for forming a hydrophobic group and the monomer for forming a hydrophilic group.

Methods, systems, and devices for PFAS destruction including providing water containing PFAS to a reactor vessel, irradiating the water with UV light under conditions to destroy at least a portion of the PFAS, passing the treated water through a selective membrane to form permeate and membrane reject comprising PFAS, providing the membrane reject back to the reactor vessel, providing additional water containing PFAS to the reactor vessel within the reactor vessel or before being provided to the reactor vessel, and irradiating the membrane reject and the additional water containing PFAS within the reactor vessel with UV light. The steps may be repeated a plurality of times such that PFAS that is not destroyed is recycled through the reactor vessel. Sensitizers may be added and may also be recycled in the membrane reject with the PFAS.

The invention relates to the technical field of anion exchange membranes, in particular to a preparation method of an alkaline anion exchange membrane containing double functional groups for synergistically improving swelling resistance, which comprises the following steps: dissolving 5g of chloromethylated polyethersulfone in 100mL of N, N-dimethylformamide, adding 1.8 mmol of triethylamine and 1.8 mmol of benzimidazole, refluxing for 8 hours at 70 DEG C under the nitrogen protection condition, filtering, washing, and drying to obtain the alkaline anion exchange membrane containing double functional groups for synergistically improving swelling resistance. Stirring is performed once every 2 hours during the period; and cooling the reaction liquid to room temperature, pouring the reaction liquid into 50mL of ethanol for precipitation, filtering, washing with ethanol for 4 times, 20mL each time, and then carrying out vacuum drying at 60 DEG C for 6 hours to obtain the quaternary ammonium salt-benzimidazole modified polyethersulfone polymer. Quaternary ammonium salt serves as a core ion conduction site, and efficient transmission of OH <-> is guaranteed; benzimidazole can form multiple hydrogen bonds with quaternary ammonium salt and a membrane matrix to effectively restrain molecular chain movement of the membrane body and inhibit swelling of the membrane in an aqueous solution or a high-humidity environment, and meanwhile, benzimidazole can be used as an OH-relay station to promote rapid migration of ions in the membrane.

The invention relates to the technical field of polymer synthesis, in particular to polyarylether containing pyridine groups and thioether groups as well as a preparation method and application of the polyarylether. A pyridine-containing bisphenol monomer, a 4, 4 '-dihydroxy diphenyl sulfide monomer and a dihalo monomer X-Ar-X are used as raw materials, alkali, alkali metal or salt of alkaline earth metal is used as a catalyst, and solution polycondensation is carried out in an aprotic polar solvent to prepare the pyridine-containing dihydroxy diphenyl sulfide. The diphenyl sulfide structure in the molecular chain of the obtained polymer endows the molecular chain with flexibility, the regularity of the molecular chain can be improved, crystallization is more facilitated to obtain a partially crystallized polymer, the limitation of pyridyl-containing agglomerated arylether on application is overcome, swelling of water or a solvent and the like on a membrane can be effectively inhibited, and the polymer has good application prospects. Particularly, the adverse effect of poor membrane stability caused by high swelling of the membrane due to water when the membrane serves as an ion exchange membrane to be applied to a flow battery is avoided. And the polyarylether containing the pyridine group and the thioether group can provide potential thioether crosslinking points with accurate and controllable quantity, so that the swelling resistance and the chemical stability of the membrane material are improved.

The invention provides a decoloring system and method for a sodium glutamate hot saturated stock solution, the sodium glutamate decoloring system is a continuous ion exchange device, and the continuous ion exchange device comprises a decoloring area, a washing area, an alkali regeneration area and a salt regeneration area which are sequentially arranged along a resin column switching direction; the decoloring area, the washing area, the alkali regeneration area and the salt regeneration area are respectively and independently provided with at least one resin column; and the resin columns are respectively and independently filled with styrene strong base anion exchange resin. The decolorizing system and method for the sodium glutamate thermal saturated stock solution have an excellent decolorizing effect, the problem of precipitation of the sodium glutamate thermal saturated stock solution in the decolorizing process is avoided, the problem of resin floating is solved, and the filling rate and the utilization rate of the resin are improved, so that the material handling capacity and the production efficiency are greatly improved, and the production cost is reduced.

Methods, systems and devices for PFAS destruction including removing nitrate from water containing PFAS, combining the water with a sensitizer and a sufficient quantity of base to create a treatment solution having a pH of about 10 or more, and irradiating the treatment solution with UV light in a photoreactor to destroy a portion of the PFAS. The nitrate may be removed electrolytically such as by electrolytically reducing nitrate to nitrogen gas and / or ammonia. The nitrate may be removed by filtration through a selective membrane, such as by reverse osmosis, forward osmosis, nanofiltration, and / or ultrafiltration. The system may include electrolytic cell system including a first cell with a cathode contacting the water containing PFAS in the first cell, a second cell including an anode in an electrolytic solution, a power source, and a salt brine and / or membrane separating the first and second cells.

Provided are a composition for forming an anion exchange polymer, the composition including a first monomer represented by Formula A and a crosslinking agent represented by Formula B, an anion exchange membrane including a crosslinked product thereof, and a method of producing an anion exchange membrane.Detailed descriptions of Formulae A and B are provided in the present specification.

A safety element (100) includes a housing (10), and a filler material (18) comprising a superadsorber (20) and / or an ion exchange resin (30) disposed in a first segment (12) of the housing (10) and configured to remove acidic or non-acidic water, the filler material (18) having a volume depending on an interaction with water when exposed to water or not exposed to water.

The present disclosure provides systems and methods for an integrated direct air capture of reactants from the atmosphere for use in an aqueous electrochemical CO2 reduction process. An integrated method of direct air capture of CO2 may be used to achieve the cost-effective production of fuels and materials by electrochemical conversion of CO2.

The embodiment of the invention provides ion exchange resin for condensate polishing and a preparation method and system, and relates to the technical field of water treatment. The ion exchange resin comprises strongly acidic cation exchange resin and / or strongly basic anion exchange resin, the particle size of the strongly acidic cation exchange resin and / or strongly basic anion exchange resin is 500-700 [mu] m, and the particle size uniformity coefficient is lower than 1.1. The embodiment of the invention can increase the reaction specific surface area and reduce the fluid resistance.