674results about "Electrodialysis" patented technology

The application discloses a bipolar membrane electrodialysis device, which comprises an outer box body and further comprises a liquid inlet mechanism, a plurality of electrodialysis mechanisms and a plurality of filtering mechanisms. The filtering mechanism comprises a filtering box, a driving filtering assembly and a liquid feeding assembly. The driving filtering assembly comprises a motor installed on the top of the filtering box, the output shaft of the motor is fixedly connected with a threaded rod, the outer periphery of the threaded rod is threadedly connected with a filtering plate slidingly connected to the inner wall of the filtering box, and the bottom inner wall of the filtering box is fixedly connected with a plurality of plug rods matched with filtering holes of the filtering plate. Raw water is delivered to the inside of the filtering box through the liquid inlet mechanism, is actively filtered without turbulence through the driving filtering assembly, is delivered to the corresponding electrodialysis mechanism through the liquid feeding assembly and is further subjected to electrodialysis treatment. The filtering plate and other components are arranged to filter out the solid impurities mixed in industrial glucose acid salt, so that the bipolar membrane electrodialysis process and the bipolar membrane body are not affected.

The invention relates to a method for simultaneously preparing lithium hydroxide and sulfuric acid. The invention provides a method for simultaneously preparing lithium hydroxide and sulfuric acid, which comprises the following steps: preparing a bipolar membrane electrodialysis device which comprises a first bipolar membrane, an anion exchange membrane, a cation exchange membrane and a second bipolar membrane, and forming an acid chamber between the first bipolar membrane and the anion exchange membrane, a salt chamber is formed between the anion exchange membrane and the cation exchange membrane, and an alkali chamber is formed between the cation exchange membrane and the second bipolar membrane; a lithium sulfate aqueous solution is added into a salt chamber of the bipolar membrane electrodialysis device, a sulfuric acid aqueous solution is added into an acid chamber, and a lithium hydroxide aqueous solution is added into an alkali chamber; and discharging the desalted solution formed in the salt chamber of the bipolar membrane electrodialysis device, discharging the sulfuric acid aqueous solution formed in the acid chamber, and discharging the lithium hydroxide aqueous solution formed in the alkali chamber.

The invention belongs to the technical field of impurity separation, and particularly discloses a method for separating and purifying impurities in a process for preparing glyoxylic acid through oxalic acid electrolysis, a crystallization kettle is included, an isolation device is arranged in the crystallization kettle, and the isolation device comprises a conical top cover, a conveying pipe, an annular filter screen, a directional conveying assembly and a sealing assembly; the conical top cover is arranged at the axis of the crystallization kettle, an opening of the conical top cover faces downwards, and a plurality of fixing rods are fixedly connected between the top of the conical top cover and the inner wall of the side face of the crystallization kettle. According to the method, glyoxylic acid product solutions with different concentration specifications and the high-purity glyoxylic acid crystal can be obtained after the electrolyte is sequentially subjected to pre-evaporation, electrodialysis, secondary evaporation, cooling crystallization, solid-liquid separation, washing and drying and other procedures, so that the prepared high-purity glyoxylic acid crystal can be popularized and applied in the field of high-end medicine.

A bipolar membrane in which a cation-exchange membrane and an anion-exchange membrane are joined to each other, wherein a leakage ratio of gluconic acid at 60° C. is not more than 1.0%, and the cation-exchange membrane is supported by a polyolefin reinforcing member and, further, contains a polyvinyl chloride.

The instant invention relates to compositions comprising a protein, e.g., an antibody, or antigen-binding portion thereof, e.g., an anti-IL-1R1 antibody or antigen binding portion thereof, and methods, e.g., cell culture and protein purification methods, for producing such compositions.

The electrodialysis device comprises a membrane stack, electrode plates, fixing plates, a sealing assembly, a transparent baffle and a collecting assembly, the electrode plates are arranged on the two sides of the membrane stack, the fixing plates are arranged on the outer sides of the electrode plates, supports are arranged on the outer sides of the fixing plates, and the sealing assembly is arranged on the outer sides of the fixing plates. The sealing assembly comprises a fixing pipe arranged on the outer side of the fixing plate and an iron cover hinged to the fixing pipe, the transparent baffle is inserted into the fixing plate in a penetrating mode, and the collecting assembly comprises a collecting box arranged at the bottom of the transparent baffle, a discharging pipe arranged at the front end of the collecting box, a valve arranged on the discharging pipe and a liquid level sensor arranged on the inner side of the collecting box. By arranging the transparent baffle and the collecting assembly, under the condition that use of the electrodialysis device is not affected, the effect of conveniently collecting leaked liquid is achieved, whether leakage occurs or not can be monitored, meanwhile, the clamping assembly can be sealed through the sealing assembly, and the situation that the corrosion speed is increased due to the fact that dust and liquid make contact with the clamping assembly is avoided.

The invention discloses a liquid guide hole structure and an electrodialysis partition plate assembly and an electrodialysis device thereof, and belongs to the technical field of electrodialysis, the liquid guide hole structure comprises a water retaining assembly, and the water retaining assembly is used for being arranged in a liquid guide hole; the water retaining assembly comprises water retaining plates which are arranged in parallel at intervals, and a gap is formed between the top of each water retaining plate and the inner wall of the corresponding liquid guide hole; a baffle runner is formed between every two adjacent water baffles, and the baffle runners communicate with the partition plate runners. The water retaining assembly is arranged in the liquid guide hole, so that the baffle flow channel is formed in the liquid guide hole, the baffle flow channel forces thin liquid or concentrated liquid flowing out of the partition plate flow channel to be gathered with liquid flowing out of other partition plate flow channels after passing through a longer flow path and a smaller cross section area, the resistance of a leakage current circuit is remarkably increased, and the leakage current circuit is more stable. Therefore, the leakage current is effectively reduced.

While maintaining the ion removal performance of EDI, the increase in the water flow differential pressure and voltage of EDI is suppressed. The water treatment method includes passing water to be treated, which contains an oxidant and dissolved oxygen, through an electrodeionized water production apparatus 24 filled with an ion exchanger. The product of the oxidant concentration (unit: mg / L) and the dissolved oxygen concentration (unit: mg / L) of the water to be treated at an inlet P2 of the electrodeionized water production apparatus 24 is 0.1 or less.

The present disclosure relates to a brine purification device, its purification method and uses thereof. It is disclosed a brine purification device comprising a housing with an inlet configured to receive untreated brine and an outlet configured to discharge purified brine from a purification chamber; wherein the purification chamber within said housing is configured to have two separated hemispheres; wherein the at least one plate comprises a first engraved serpentine flow channel in a first side configured for the flowing of brine and a second engraved serpentine flow channel in the opposite side of the same plate configured for the flowing of a flowing fluid; wherein the two sides of the at least one plate are separated by an anion-exchange membrane in such a way that the untreated brine combine with counter-ions from the flowing fluid through said anion-exchange membrane; wherein the at least one plate is configured for a fluid velocity of 0.007 to 0.015 m / s considering a thickness of 3 to 6 mm.

To provide a processing device where the leakage of a processing liquid can be reduced.SOLUTION: In a processing device performing electrodialysis or electrodialysis reversal by composing a plurality of spaces by mutually aligning a plurality sheets of cation exchange membranes 14 and anion exchange membranes 13 between negative plates 12 and positive plates 11 interposing gaskets 15 (frame members) and flowing a processing liquid supplied from outside into the plurality of spaces, the gaskets 15 (frame members) have seal lines 154, 254 regulating the flowing range of the processing liquids.SELECTED DRAWING: Figure 5

A method of moderating concentration of at least highly fluorinated alkyl materials (e.g., molecules) from a contaminated aqueous feed liquid containing an original composition of between 5 parts / trillion and 3000 parts / billion of the at least highly fluorinated materials per liter of water into an aqueous electronic separator having multiple chambers including a feed chamber having a liquid exit port from which a mediated aqueous contaminated feed liquid exits and a liquid input port into which the contaminated aqueous feed liquid enters the feed chamber; an anodic electrode chamber filled with an aqueous anodic liquid; and a cathodic electrode chamber filled with an aqueous cathodic liquid; wherein the feed chamber is between and adjacent to the anodic electrode chamber and the cathodic electrode chamber and the feed chamber is separated from each of the anodic electrode chamber and the cathodic electrode chamber by at least one semipermeable membrane.

An electrode for a capacitive deionization device according to the concept described herein includes a current collector and an active material layer disposed on one surface of the current collector, in which the active material layer includes: a plurality of porous structures each including a plurality of carbon nanotubes; and a binder for fixing the plurality of porous structural bodies to the current collector, and each of the plurality of porous structural bodies includes a wide-bottom narrow-top structure that widens in a direction away from the current collector.

A plant extract production method comprising: an extraction step for obtaining an extract by extraction from a plant dispersion containing a plant; a filtration step for obtaining a filtrate by filtering the extract by means of cross-flow filtration; and a dialysis step for dialyzing the filtrate by means of electrodyalysis.

The present application provides a chromatographic baseline suppression device and a manufacturing method thereof, the chromatographic baseline suppression device comprises a container and two ion exchange membranes, the two ion exchange membranes divide the inside of the container into a first part, a second part and a third part, the second part has an inlet and an outlet; the chromatographic baseline suppression device further comprises two electrodes respectively in the first part and the second part, the electrodes comprise a matrix porous material layer and a polymer layer, the matrix porous material layer is conductive and is connected with the ion exchange membrane. The present application has the advantages of small noise and the like.

The application relates to the technical field of bipolar membrane electrodialysis, and provides a bipolar membrane, a preparation method, an activation method and application thereof. The bipolar membrane provided by the application has obviously improved service life and is not prone to bubble and delamination phenomena during long-time operation. The preparation method comprises the following steps: forming an adhesive layer between the cation exchange layer and the catalyst layer, and / or forming an adhesive layer between the anion exchange layer and the catalyst layer. Preferably, the cation exchange layer is provided with sulfonic acid groups, and the anion exchange layer is provided with quaternary ammonium groups.

The present disclosure relates to a water purification apparatus that comprises a reverse osmosis device, RO-device, producing a purified water flow and to a corresponding method. The proposed method comprises detecting at least one fluid property of purified water in the purified water path and regulating a flow rate of water in the recirculation path to fulfil one or more predetermined criteria of the purified water in the purified water path, based on the at least one detected fluid property. The present disclosure also relates to a computer program and a computer program product implementing the method.

In a water treatment system including an EDI (Electronized Deionization Intake) device, the goal is to increase the water recovery rate in the EDI device and to obtain treated water with stable quality even when water quality fluctuates significantly. [Solution] The water treatment system includes a circulation pipe 36 that circulates treated water (deionized water) from the EDI device 10 to the upstream of the EDI device 10, a water supply pipe 35 that delivers the treated water to the use point, a flow rate adjustment unit 34 that distributes the treated water to the circulation pipe 36 and the water supply pipe 35, a circulation pipe 44 that circulates concentrated water from the EDI device 10 to the upstream of the EDI device 10, a discharge pipe 43 that discharges the concentrated water outside the system, a flow rate adjustment unit 42 that distributes the concentrated water to the circulation pipe 44 and the discharge pipe 43, and water quality monitoring devices 51 to 54 that monitor the water quality within the water treatment system from the EDI device 10. Based on the monitoring results from at least one of the water quality monitoring devices 51 to 54, at least one of the flow rate adjustment units 34 and 42 is controlled.

The application discloses a kind of salt ion exchange membrane for electrodialysis and preparation method thereof, cation exchange membrane is immersed in the buffer containing tannic acid and zwitterion diamine monomer, reaction is carried out at 0~60 ℃ for 0.5~60 h, obtain salt ion exchange membrane for electrodialysis.The application is formed by the Michael addition or Schiff base reaction between tannic acid molecule and zwitterion diamine monomer under weak alkaline condition, uniform, stable tannic acid / diamine zwitterion ultrathin coating is formed on the surface of cation exchange membrane.The application significantly improves Li + / Mg 2+ Selectivity. Preparation process is simple, environmental protection, strong universality, the modified cation exchange membrane prepared by the application has excellent Li + / Mg 2+ Selectivity, and can improve the anti-pollution of membrane, can be used for high magnesium lithium ratio brine electrodialysis method lithium extraction.

The electrodialysis device includes a plurality of gaskets stacked in one direction, each of which allows a different solution to pass therethrough, a plurality of ion exchange membranes positioned between the gaskets, and a liquid supply frame positioned on one side of the gaskets and supplying the different solutions to each of the gaskets, the liquid supply frame including a central module overlapping the gaskets in the one direction, and an upper module coupled to an upper portion of the central module, communicating with the gaskets, and including a plurality of discharge flow paths through which the different solutions that have passed through the gaskets are discharged.

Once the amount of usage at each use point decreases and the measurement value of water level by water level meters 61A, 61B increases, the amount of water supply to pure water tanks 60A, 60B is reduced by reducing the opening degree of control valves 59A, 59B. This increases the water supply pressure of a pressure meter 58, and thus the output by a high pressure pump 52B is reduced through inverter control on the basis of the measurement value from the pressure meter 58. On the other hand, once the amount of usage at each use point increases and the measurement value of the water level of the pure water tanks 60A, 60B becomes smaller than this reference value, the amount of water supply to the pure water tanks 60A, 60B is increased by opening the opening degree of the control valves 59A, 59B. This reduces the water supply pressure of the pressure meter 58, and thus the output by the high pressure pump 52B is increased through inverter control such that the measurement value from the pressure meter 58 becomes substantially constant. Such a control method for a pure water production system allows for control of the amount of water supply of the entire system, particularly one having a plurality of tanks, according to the amount of water usage.

This invention discloses a method and system for selective separation of monovalent and divalent ions in an alginate fiber coagulation bath based on electrodialysis, belonging to the field of fiber production and membrane separation technology. The method and system integrate a selective electrodialysis device into a traditional coagulation bath circulation system. Utilizing an ion exchange membrane with monovalent and divalent cation selectivity, sodium ions accumulated in the coagulation bath are selectively migrated and removed under the action of an electric field, while divalent metal ions are efficiently retained, thereby maintaining a stable molar ratio of divalent ions to sodium ions in the coagulation bath within the required process range. Compared to traditional methods, this invention eliminates the need for large-scale replenishment of divalent metal salts or full replacement solution, significantly reducing production costs and resource waste. It achieves online regeneration and continuous circulation of the coagulation bath, significantly improving production stability, fiber quality, and resource utilization efficiency, and is suitable for the green and efficient production of various alginate fibers.

The present invention relates to a process for separating lithium ions and sodium ions from a sulfate-containing solution, and to an apparatus for carrying out the process.

An electrodialysis device according to one embodiment of the present disclosure includes an ion exchange membrane configured to exchange ions and gaskets provided to be in contact with the ion exchange membrane and configured to seal the ion exchange membrane, in which the gaskets include a first gasket positioned at one side of the ion exchange membrane and a second gasket positioned at the other side of the ion exchange membrane, in which the first gasket includes a first main gasket, and first auxiliary gaskets configured to surround the first main gasket and in which a thermal expansion rate of the first main gasket is lower than a thermal expansion rate of the first auxiliary gasket.

To provide a cation exchange membrane which is highly selective to specific cations, particularly ammonium ions, and which also has high energy efficiency during dialysis. A cation exchange membrane having a cation exchange layer containing a metal cyano complex and a binder resin.

A method for recycling catalytic metals comprising: collecting a plurality of spent catalytic metals, wherein the spent catalytic metals contain cathodes of NMC111, NMC622, NMC811, NCA, LCoO2, LiNi0.5Mn1.5O4, LiMnO4, LiNiO2, LiMn2O4, and / or LiMnO2 compositions; subjecting the plurality of spent catalytic metals to a green mixture, wherein the green mixture includes dihydrogen phosphite and water, phosphoric acid and water, sulfuric acid and water, hydrogen chloride and water, or nitric acid and water, at temperatures of between 80 and 120° C. to form a metal leachate solution; and recovering lithium (Li) from the metal leachate solution.

This invention discloses a method for preparing high-purity hydroiodic acid based on an electrodialysis system, belonging to the fields of chemical engineering and new energy technology. The method includes: introducing a first iodide solution into the material chamber of a three-compartment bipolar membrane electrodialysis system; after acid-base preparation, a second iodide solution is obtained; the obtained second iodide solution is then introduced into the desalination and concentration chambers of a two-compartment homogeneous membrane electrodialysis system for electrodialysis concentration, yielding a third and fourth iodide solution; the products from each stage can be reused or sold after processing. This invention avoids the generation of the byproduct iodate, directly generating a high-purity, high-concentration hydroiodic acid solution, eliminating cumbersome and expensive purification steps, and completely achieving product separation. The process is simple, safe, and environmentally friendly. The acid produced by the three-compartment bipolar membrane electrodialysis system becomes a qualified hydroiodic acid product after passing through an MVR evaporation system, and the produced alkali, as a byproduct, can be sold or utilized, turning waste into treasure.

An ion permeable membrane for selective permeation of a target ion, preferably lithium, through the membrane, the membrane comprising a target ion permeable composite comprises a target ion permeable ceramic and at least one organic polymer associated with the target ion permeable ceramic.

The instant invention relates to compositions comprising a protein, e.g., an antibody, or antigen-binding portion thereof, e.g., an anti-IL-1R1 antibody or antigen binding portion thereof, and methods, e.g., cell culture and protein purification methods, for producing such compositions.

An improved spacer for use in electrodialysis and electrodeionization stacks can provide close contact between the spacer mesh and its adjacent ion exchange membranes, reducing the water flow cross-section through the cell. This in turn can lead to higher flow velocities and increased flow turbulence between ion exchange membranes, thereby reducing membrane polarization effects and increasing the limiting current density. The improved spacer can be combined with a voluminous spacer gasket for receiving a volume of electroactive media, the voluminous spacer gasket comprising an outer gasket edge having an open central area for receiving the electroactive media, and holes on the top and bottom of the outer gasket edge whose dimensions match the holes on the spacer.

The present invention relates to a process for the production of an organic acid comprising the steps of: a) providing a feed stream of comprising an aqueous medium of a monovalent salt of an organic acid, b) splitting the feed stream into at least a first and second stream, c) subjecting the streams to bipolar electrodialysis in an acid flow compartment (1) defined by a bipolar membrane (6) and either a cation or anion selective membrane (6) and a base flow compartment (2) defined by a bipolar membrane (6) and either a cation or anion selective membrane (6), wherein the compartments are arranged between a positive electrode (anode) (4) and a negative electrode (cathode) (5) and are separated by either a cation or anion selective membrane (6), whereby the first stream is fed to the acid flow compartment and the second stream is fed to the base flow compartment, d) whereafter an aqueous acid stream comprising an organic acid is leaving the acid flow compartment and an aqueous base stream comprising a base and monovalent salt of the organic acid is leaving the base flow compartment. With the present process a reduction of the water consumption is achieved, while allowing to work in a concentration window for the monovalent salt that is optimal with respect to conductivity.