311results about "Anion exchangers" patented technology

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.

The invention discloses a preparation method of an acid-resistant polyquaternary ammonium membrane based on a Porxitch interfacial polymerization reaction. The preparation method comprises the following steps: dissolving an amine monomer in a water-phase solvent to form a water-phase solution; dissolving a bromomethyl monomer in an organic phase solvent to form an organic phase solution; after the base membrane is soaked in the water phase solution for a period of time, the water phase solution is removed, and the water phase solution remaining on the surface of the base membrane is removed; coating the organic phase solution on the surface of a base membrane, and carrying out interfacial polymerization reaction for 1-15 minutes at the high temperature of 50-90 DEG C, so as to prepare a polyquaternary ammonium membrane on the base membrane; and washing the surface of the polyquaternary ammonium membrane with an organic solvent to remove residual reactants, and then carrying out heat treatment in a drying oven to obtain the acid-resistant polyquaternary ammonium membrane.

The invention relates to the technical field of membrane separation, and discloses a double-side-chain anion exchange membrane as well as a preparation method and application thereof. The anion exchange membrane comprises a plurality of polyphenyl ether molecular chains, the polyphenyl ether molecular chain has a structure as shown in a formula I; # imgabs0 # Q1, Q2, Q3 and Q4 are each independently a group represented by formula II, a group represented by formula III, Br or H; at least two of Q1, Q2, Q3 and Q4 are a group as shown in a formula II and a group as shown in a formula III; at least two polyphenyl ether molecular chains of # imgabs 1 # are connected through a structure Ar from a cross-linking agent; according to the double-side-chain anion exchange membrane, two long-chain hydrophobic alkyl side chains are introduced into a polyphenyl ether molecular chain, so that the content of an active ion exchange matrix in the anion exchange membrane is remarkably increased, and the performance of the anion exchange membrane is improved.

According to the high-strength resin and the preparation method thereof, firstly, styrene-divinylbenzene copolymerization reaction or divinylbenzene polymerization reaction which is carried out under common normal pressure is promoted to be carried out under high pressure of 0.3-0.6 MPa, so that the polymerization reaction temperature can be increased; therefore, the reaction activity of polystyrene and styrene free radicals or divinylbenzene free radicals is improved, the average molecular weight of a polystyrene main chain or a polydivinylbenzene main chain in the polymer is further improved, and the molecular weight distribution dispersity is reduced; secondly, a free radical initiator is not added, and the structural defect caused by tiny bubbles generated by decomposition of the initiator is also eliminated; thirdly, nitrogen is charged for deoxidation before polymerization reaction, free radical terminator oxygen is removed, free radical inactivation caused by dissolved oxygen is avoided, and chain growth and termination of a main molecular chain are avoided. The styrene resin beads with high polymerization degree are prepared, and the mechanical strength of the synthesized anion-cation exchange resin and adsorption resin is greatly improved.

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 a preparation method of an anion exchange membrane for cross-chain transportation. The anion exchange membrane has the advantages of small resistance, high ion transmission rate and good desalting performance. Specifically, a crown ether structure is introduced, so that a direct and efficient ion transmission path is provided; the introduction of crown ether not only improves the chemical stability of the anion exchange membrane, so that the membrane can stably work in a wider chemical environment, but also enhances the ion selectivity; the crown ether structure is chemically modified, so that the properties of an ion channel can be further regulated and optimized, such as changing the size and shape of the channel or the characteristics of a functional group, so as to adapt to specific ion screening requirements. In addition, the anion exchange membrane also achieves a remarkable effect on optimization of transmittance and resistance. Due to the characteristics, the membrane material can show higher efficiency and reliability in various industrial applications.

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.

Methods, systems and devices for PFAS destruction including adding a sulfite salt to an aqueous solution containing PFAS and then irradiating the aqueous solution with light at 222 nm. The method may include adding a base to the aqueous solution in an amount sufficient to raise a pH of the aqueous solution including PFAS to about 10 or more. It may also include adding a halide salt such as a bromide salt or an iodine salt, and further adding a carbonate. Greater than 90%, or greater than 99%, of the PFAS in the solution may be destroyed by irradiating the aqueous solution in this way.

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.

To provide an anionic treatment agent that removes the disadvantages of an anionic treatment agent using a layered double hydroxide as a raw material and improves the anion exchange ability, and is suitable for inventory management.SOLUTION: An anionic treatment agent A is a product produced by mixing a layered double hydroxide 1 having anion exchange ability and a feldspar clay 2 that maintains its shape even in water by drying, and subjecting the mixture to the steps of rolling and granulating, drying, and classifying. The layered double hydroxide 1 includes a chlorine type, a carbonate type, or the like depending on the anion species contained in the layer, and when an anionic treatment of an ionic fluorine, nitrogen, or phosphorus compound is intended, it is desirable to use a chlorine type layered double hydroxide having excellent anion exchange selectivity as a raw material. The feldspar clay 2 is obtained by grinding feldspar, which is a type of a tridimensional techtosilicate containing an aluminosilicate such as an alkali metal or an alkaline earth metal as a main component, to form a powder having a size of 5 μm or less.SELECTED DRAWING: Figure 1

Anion exchange polymers having high OH" conductivity, chemical stability, and mechanical stability have been developed for use in AEMs. The anion exchange polymers have stable hydrophobic polymer backbones, stable hydrophilic quaternary ammonium cationic groups, and hydrophilic phenolic hydroxyl groups on the polymer side chains. The polymers have polymer backbones free of ether bonds, hydrophilic polymer side chains, and piperidinium ion-conducting functionality, which enables efficient and stable operation in water or CO2 electrolysis, redox flow battery, and fuel cell applications. The polymer comprises a plurality of repeating units of formula (I) Anion exchange membranes and membrane electrode assemblies incorporating the anion exchange polymers are also described.

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.

An anitrogen-containing multicomponent copolymer is provided, and includes at least two of a chain segment I, a chain segment II, and a chain segment III. A structural formula of the chain segment I is represented by where Ar1 is an aryl structural unit. A structural formula of the chain segment II is represented by where Ar2 is an aryl structural unit. A structural formula of the chain segment III is represented by where Ar3 is an aryl structural unit.

The invention discloses a method for recovering mixed acid waste liquid containing hydrofluoric acid, comprising reacting a raw material with a sodium salt or a potassium salt, and then filtering to obtain a filtrate; the raw material is a mixed acid waste liquid containing hydrofluoric acid; the filtrate is sent to a diffusion dialysis device for treatment, the diffusion dialysis device includes a homogeneous anion exchange membrane; the recovered liquid obtained by the treatment of the diffusion dialysis device is sent to a membrane separation device, the membrane material of the membrane separation device is an acid-resistant metal ion removal membrane, and the recovered mixed acid is obtained on the permeation side of the membrane separation device. The invention can effectively remove impurities and metal ions in low-concentration waste acid solutions, so that the products meet the electronic grade reuse standard, improve the resource recovery rate, and have a simple process flow and low energy consumption, which is suitable for industrial promotion and application.

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.

Provided is a carbon dioxide absorber which contains a polyether compound and which is characterized in that: the polyether compound contains an average of 50 or more repeating units represented by general formula (1) set forth in the description per molecule; and the polyether compound contains repeating units represented by general formula (2) set forth in the description as at least some of the repeating units represented by general formula (1).

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.

Provided is a resin composition used for forming a laminated glass interlayer film or a solar cell encapsulant, the resin composition including an ionomer (A) of an ethylene-unsaturated carboxylic acid-based copolymer, wherein metal ions constituting the ionomer (A) of the ethylene-unsaturated carboxylic acid-based copolymer includes two or more kinds of polyvalent metal ions.

An anion exchange membrane includes a porous structural framework and bismuth atoms bonded to pore surfaces of the porous structural framework. Each bismuth atom is bonded to a pore surface by way of one or two oxygen atoms.

The invention relates to resin for adsorbing vanadium in an acidic vanadium-containing solution and a preparation method of the resin. According to the technical scheme, macroporous anion exchange resin and phytic acid are mixed according to the solid-to-liquid ratio of 1: (15-30) Kg / L, and a mixture I is obtained; stirring the mixture I for the first time under the condition that the temperature is 30-90 DEG C, and carrying out solid-liquid separation to obtain resin to be treated and pretreatment liquid; mixing the resin to be treated with oxalic acid according to a solid-to-liquid ratio of 1: (18-32) Kg / L to obtain a mixture II, stirring the mixture II for the second time at the temperature of 40-80 DEG C, and carrying out solid-liquid separation to obtain treated resin and modified residual liquid; and standing the treated resin to prepare the resin for adsorbing vanadium in the acidic vanadium-containing solution. The resin for adsorbing vanadium in the acidic vanadium-containing solution has the characteristics of large saturated adsorption capacity, high vanadium adsorption rate and wide pH application range when the resin is used for adsorbing vanadium in the acidic vanadium-containing solution.

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