69results about "Cation exchangers" patented technology

The present application relates to a kind of methods for separating actinium from irradiated thorium target, belong to medical radioisotope manufacturing technical field, solve the problem that thorium element and lanthanide element impurity content in final actinium product in prior art is higher.The present application discloses a kind of methods for separating actinium from irradiated thorium target, first, irradiated thorium target is dissolved, then using cation exchange resin column, UTEVA or TK200 resin extraction column, DGA resin extraction column, LN resin extraction column four-stage series separation purification process, obtain final actinium product.Actinium is efficiently and selectively recovered, and the thorium element and lanthanide element impurity content in final actinium product is significantly reduced.

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.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The application relates to the technical field of hydrogen production by water electrolysis, in particular to a composite anion exchange membrane and a preparation method and application thereof. The preparation method of the composite anion exchange membrane comprises the following steps: mixing a polymer, an organic solvent and an aldehyde compound to form a casting solution; forming the casting solution to prepare an aldehyde compound-combined anion exchange membrane; immersing the aldehyde compound-combined anion exchange membrane into an acid solution containing an amino compound to perform an aldehyde amine condensation reaction, and forming the composite anion exchange membrane; and the polymer and the amino compound contain quaternary ammonium groups. The application can simply and quickly synthesize a large-area composite anion exchange membrane doped with a covalent organic framework, and the composite anion exchange membrane has good structural stability and excellent ion conduction performance, and can meet the application requirements of hydrogen production by water electrolysis.

The utility model discloses equipment for preparing hypochlorous acid based on an ion exchange method, which relates to the technical field of hypochlorous acid preparation equipment and comprises a water inlet part, and the liquid inlet end of the water inlet part is connected with an external water supply pipeline; the liquid inlet end of the liquid injection part is connected with the water inlet part; the liquid inlet end of the ion exchange part is connected with the liquid injection part, and the liquid outlet end of the ion exchange part is connected with the hypochlorous acid using terminal through an external liquid conveying pipeline; the pipe diameter of the use terminal is greater than or equal to that of the liquid injection part; the controller is electrically connected with electrical elements in the water inlet part and the liquid injection part; according to the device, high-concentration hypochlorous acid can be prepared, the liquid outlet amount is large, and the weakly acidic cation exchange inner core has a good pH buffering function, so that the potential safety hazard of chlorine overflow does not exist.

The invention relates to a method for preparing a material capable of extracting lithium, comprising the following steps: (a) preparing a geopolymer mixture by mixing (i) an activating solution comprising at least lithium hydroxide and (ii) an aluminosilicate source; (b) curing the geopolymer mixture prepared in step a), thereby obtaining a geopolymer matrix material; and (c) washing the geopolymeric matrix material obtained in step b) so as to remove at least a portion of the lithium cations (Li +) contained in the geopolymeric matrix material and obtain a material capable of extracting lithium The invention also relates to the material thus obtained and to the use thereof.

The utility model provides a device and a system for producing an optical fiber preform based on industrial grade D4. The device for producing the optical fiber preform based on the industrial grade D4 comprises a coarse treatment device, a fine treatment device, a low-boiling-point impurity treatment device and a high-boiling-point treatment device which are communicated in sequence, an anion-cation exchange resin membrane and a molecular sieve are arranged in the fine treatment device to remove metal ions and anion impurities in the D4 liquid, the low-boiling-point impurity treatment device is used for separating low-boiling-point impurities in the D4 liquid, the high-boiling-point treatment device is used for separating high-boiling-point impurities in the D4 liquid, and a gas outlet of the high-boiling-point treatment device is communicated with the combustor. According to the device provided by the utility model, the existing commercially available industrial grade D4 is utilized, the adverse effect of gel on deposition production equipment in the D4 gasification process is relieved, the tolerance requirement of the deposition equipment on the purity of the raw material D4 is increased, and the production cost of the optical fiber preform can be reduced.

Sulfonated poly(phenylene ether) has repeating units of phenylene ether and has a sulfonation degree of 20 to 50% and a molar ratio of sulfonyl chloride (-SO2Cl) to sulfonic acid (-SO3H) of 0.06 or less. Sulfonated poly(phenylene ether) can be used, for example, in membranes for separation based on gas and ion exchange. A method for producing sulfonated poly(phenylene ether) is 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.

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 relates to a homogeneous cation selective exchange membrane and a preparation method thereof, and belongs to the technical field of ion exchange membranes. The raw material of the homogeneous cation exchange membrane comprises film-forming resin, and the film-forming resin is hyperbranched nylon 6 resin; the hyperbranched nylon 6 resin is prepared by taking a sulfo-terminated cyclotriphosphazene monomer as a branching agent and carrying out hydrolysis ring-opening polymerization reaction on the sulfo-terminated cyclotriphosphazene monomer and caprolactam. The hyperbranched structure of the hyperbranched nylon 6 resin is utilized, a sulfonic group at the tail end can be used as an active group for cation exchange, and the homogeneous cation exchange membrane has good processability, so that the homogeneous cation exchange membrane has excellent selective adsorption and migration exchange capacities and shows excellent rapid kinetics in the ion exchange process.

Described herein are branched and hyperbranched anionic phenylene polymers prepared with controlled anionic substituents. Applications of such branched ionomeric polymers are also described. The branched ionomeric polymers are made in a convenient and well-controlled manner, allowing for tailored properties in catalyst ink formulations, ionomeric polymer membranes, and other applications. Such branched ionomeric polymers find applications in water purification, fuel cell, and battery products.

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.

The invention provides an ion exchange system and an ion exchange method. The ion exchange system comprises a feeding system, an ion exchange system and a separation system, the ion exchange method comprises the following steps: firstly, feeding through the feeding system, then carrying out ion exchange treatment on the molecular sieve by utilizing the ion exchange system, and completing multiple ion exchange operations under the cooperation of the separation system and the feeding system. The system can efficiently and quickly complete sodium type silicon aluminum molecular sieve ammonium ion exchange, and has the characteristics of wide application range of molecular sieve types, stable product quality, recoverable ammonium solution and the like.

The application belongs to the field of wastewater treatment and cation exchange membrane preparation, and particularly relates to a hybrid membrane for selectively transporting lithium ions and a preparation method and application thereof. The hybrid membrane is an HMO\PVDF hybrid membrane. The provided hybrid membrane is obtained by adding HMO as a functional filler in a PVDF matrix and uniformly mixing. The HMO provides a transfer point for lithium ion transport, and the uniformly distributed HMO constructs a selective lithium ion transport network, and is used in selective electrodialysis technology to realize rapid migration of lithium ions, and can be used for rapid extraction / separation of lithium from leaching solution of waste lithium batteries. The hybrid membrane prepared by the application has excellent lithium ion selective permeability, high stability and reusability, is low in cost, is suitable for large-scale preparation, and has a wide application prospect.

To provide a method of producing a monovalent selective cation exchange membrane, a monovalent selective ion exchange membrane, and a water treatment system.SOLUTION: There is provided a method of producing a monovalent selective cation exchange membrane including: chemically adsorbing an acrylic intermediate layer comprising a chlorosulfonated methacrylate group to a cross-linked ion-transferring polymeric layer on a surface of a polymeric microporous substrate; aminating the chlorosulfonated methacrylate group to attach an amine group layer; and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane. There are also disclosed water treatment systems including the monovalent selective cation exchange membrane and methods of facilitating water treatment including providing the monovalent selective cation exchange membrane.SELECTED DRAWING: Figure 3

The present invention provides a method for recovering metal impurities from an organic solvent, the method comprising: a step for preparing a diluent by diluting the organic solvent with water; and a step in which the prepared diluent is introduced into the adsorbent (12) as a sample liquid, and the metal impurities in the sample liquid are captured in the adsorbent (12).

Provided is a method for producing a lithium-containing solution that allows suppressing production cost for lithium production by suppressing solution amount after an adsorption step, increasing a lithium content rate in the lithium-containing solution, and suppressing amount of solution used in a step after a manganese oxidation step. The method for producing a lithium-containing solution performs the adsorption step, an eluting step, and an manganese oxidation step in this order. In the adsorption step, an anion-exchange resin is used together with the lithium adsorbent. This aspect allows hydrogen ions generated in the adsorption step to be adsorbed by the anion-exchange resin, thereby promoting an adsorption reaction. Therefore, the solution amount after the adsorption step can be suppressed, the lithium content rate in the lithium-containing solution increases, the amount of the solution used in the step after the manganese oxidation step is suppressed. This allows suppressing production cost for lithium production.

The present invention provides a reinforced ion-conductive membrane comprising (a) a reinforced layer containing a porous polymer structure and (b) a polymer ion-conductive membrane material impregnated within the porous polymer structure. The porous polymer structure contains a polymer backbone based on nitrogen-containing heterocycles, and the polymer ion-conductive membrane material has a transition temperature Tα in the range of 60°C to 80°C.

The invention belongs to the field of membrane separation, and discloses a high-flux monovalent cation exchange membrane and application of the high-flux monovalent cation exchange membrane in electrodialysis separation of lithium and magnesium. Quaternized polyethyleneimine modified sulfonated polyethylene sulfone is used as a base membrane, and the surface of the membrane is compounded with a water phase through polyethyleneimine and amination modified beta-cyclodextrin; and performing interfacial polymerization with an organic phase containing a surfactant and a cross-linking agent to form a composite functional layer. The preparation process is simple, convenient and controllable, and the obtained membrane has high lithium ion flux, excellent Li < + > / Mg < 2 + > separation selectivity and good stability, can be efficiently used for electrodialysis lithium-magnesium separation, solves the problem that the flux and selectivity of the existing membrane are difficult to consider at the same time, and provides reliable technical support for extraction of lithium from salt lake brine.

The present application relates to the field of high molecular polymer separation membrane material, disclose a kind of for monovalent / divalent ion separation cation exchange membrane, both contain rigid aromatic main chain structure, also contain flexible aliphatic side chain structure with hydrophilic cation exchange group. During film forming process, hydrophobic main chain and hydrophilic side chain respectively self-aggregation forms "hydrophobic aromatic region microphase" and "hydrophilic ion cluster microphase", it is helpful to form the ion channel of suitable size;Different aliphatic side chains are introduced on polymer main chain respectively, through the electrostatic interaction difference between different kinds of cation exchange groups carried by side chain and monovalent / divalent cation (such as, Li + / Mg 2+ ) of same charge but different charge, then the ratio of cation mobility and ion exchange equilibrium constant change, thereby promote the transport of monovalent ion in ion exchange membrane, and do not permeate divalent ion.

An automated end-to-end continuous purification system for the manufacture of therapeutic proteins to reduce complexity of manual process operations and minimize physical space requirements.

This invention belongs to the field of water treatment and provides a zero-discharge hardness removal process using aluminum-based adsorbents. The process involves uniformly mixing sodium and aluminum salts in a solution to obtain a mixed solution; performing ion exchange with a cation exchange resin using this mixed solution to obtain an aluminum-based adsorbent; treating water with this aluminum-based adsorbent to adsorb calcium or magnesium ions, forming nano-sized aluminum hydroxide precipitates that adhere to the aluminum-based adsorbent framework, and collecting the effluent; regenerating the aluminum-based adsorbent with carbon dioxide gas to displace calcium or magnesium bicarbonate, collecting the effluent, and allowing it to settle to form calcium carbonate or magnesium carbonate precipitates, thus obtaining the final product. This hardness removal process does not use any chemical agents, only carbon dioxide gas as a regenerator. The regeneration process produces no waste liquid and simultaneously achieves carbon dioxide fixation and hardness ion removal, meeting the requirement of zero discharge.

The invention relates to the technical field of lithium recovery, in particular to imine diacetic acid-based chelate resin as well as a preparation method and application thereof. The imino diacetic acid chelate resin realizes separation of the imino diacetic acid chelate resin and the sodium and lithium relying on the function of functional groups and the difference of hydration radiuses of the lithium and the sodium, and the lithium adsorbability is slightly higher than that of the sodium. When the resin is saturated by adsorption, a hydrochloric acid solution slowly passes through the resin column, the hydrochloric acid solution can replace lithium ions and sodium ions adsorbed on the resin, but due to the fact that the resin has different selectivity on the lithium ions and the sodium ions, the sodium ions can be analyzed more quickly than the lithium ions with higher selectivity, and a better lithium-sodium separation effect is achieved.

Described herein are articles of manufacture comprising intertwined cation-conductive polymer fibers such as cross-linked sulfonated polystyrene (c-SPS) fibers and conductive nanoparticle-embedded hydrophilic water-insoluble polymer fibers such as PAN fibers in which the conductive nanoparticles are embedded within the hydrophilic water-insoluble polymer fibers. Also described are dense ion-exchange membranes formed from the articles of manufacture by hot-pressing the intertwined fibers to form a dense (i.e., substantially non-porous) membrane. The articles of manufacture are prepared by co-electrospinning cationic conductive polymer fibers such as SPS fibers and conductive nanoparticle-embedded hydrophilic water-insoluble polymer fibers such as PAN fibers from separate nozzles into the same collector, which substantially uniformly intertwines the fibers. The SPS fibers are then crosslinked with a suitable crosslinking agent, such as polyethylene oxide (PEO; also known as polyoxyethylene), poly(vinyl alcohol) or divinylbenzene.

The present invention relates to a product comprising: - water, and - crystallites, at least a part, preferably substantially all of said crystallites being made of lithiated bayerite, the average size of the lithiated bayerite crystallites being greater than or equal to 10 nm and less than or equal to 25 nm, and said product having a cumulative rate of aluminium hydroxide and boehmite less than or equal to 10%, said product comprising at least the elements Li, Cl, Al, O and H, the elements Li, Cl and Al being present in said dry product in the following amounts, determined by inductively coupled plasma spectrometry, in weight percentages: - 2% < Li < 5%, - 10% < Cl < 26%, - 15% < Al < 30%.

The present invention relates to a protective material and protective clothing, each with a protective function against chemical, biological, or radioactive pollutants and / or toxins, preferably for civilian or military purposes, and their uses or applications.

The invention discloses a composite proton exchange membrane and a preparation method thereof, a membrane electrode and an electrochemical device. The composite proton exchange membrane comprises a proton membrane and hydrate of solid acid dispersed in the proton membrane. A proper amount of solid acid hydrate is doped in the proton membrane, the solid acid hydrate plays a role of a micro-nano reservoir in the proton membrane, and the intelligent proton exchange membrane capable of automatically adjusting the water content according to environmental changes is constructed. When the water content of the anode side proton membrane is reduced, the hydrate of the solid acid can provide water molecules to the anode side proton membrane, and the wettability is kept; when the reverse osmosis water quantity of the cathode side is increased, the hydrate of the solid acid can absorb redundant water molecules to inhibit water logging of the anode side.