EP1235622A1 - Substrat d'electrodesionisation et dispositif destine a un traitement d'electrodesionisation - Google Patents

Substrat d'electrodesionisation et dispositif destine a un traitement d'electrodesionisation

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Publication number
EP1235622A1
EP1235622A1 EP00954125A EP00954125A EP1235622A1 EP 1235622 A1 EP1235622 A1 EP 1235622A1 EP 00954125 A EP00954125 A EP 00954125A EP 00954125 A EP00954125 A EP 00954125A EP 1235622 A1 EP1235622 A1 EP 1235622A1
Authority
EP
European Patent Office
Prior art keywords
exchange
recited
ion
entities
porous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00954125A
Other languages
German (de)
English (en)
Other versions
EP1235622A4 (fr
Inventor
Rathin Datta
Yupo Lin
Dennis Burke
Shih-Perng Tsai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Chicago
Original Assignee
University of Chicago
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Chicago filed Critical University of Chicago
Publication of EP1235622A1 publication Critical patent/EP1235622A1/fr
Publication of EP1235622A4 publication Critical patent/EP1235622A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/44—Ion-selective electrodialysis
    • B01D61/46—Apparatus therefor
    • B01D61/48—Apparatus therefor having one or more compartments filled with ion-exchange material, e.g. electrodeionisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/018—Granulation; Incorporation of ion-exchangers in a matrix; Mixing with inert materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/02—Column or bed processes
    • B01J47/06—Column or bed processes during which the ion-exchange material is subjected to a physical treatment, e.g. heat, electric current, irradiation or vibration
    • B01J47/08—Column or bed processes during which the ion-exchange material is subjected to a physical treatment, e.g. heat, electric current, irradiation or vibration subjected to a direct electric current
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/20—Manufacture of shaped structures of ion-exchange resins
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/4604—Treatment of water, waste water, or sewage by electrochemical methods for desalination of seawater or brackish water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis

Definitions

  • the present invention relates to electrodeionization and more particularly, the invention relates to an electrodeionization substrate and a device for treating fluids via electrodeionization.
  • feed streams Prior to their ultimate use, feed streams must often be pretreated to remove unwanted ionic contaminants.
  • Typical clean-up processes include the use of ion-exchange resins and electrodialysis.
  • ion-exchange after the targeted ions are removed from a feed solution, the ion-exchange resins are exhausted and have to be regenerated by acids, bases, or salts. Thus the process produces an equivalent or higher amount of waste salt stream from the regeneration process.
  • Electrodialysis is an electrically driven ion-exchange membrane based process where by using a stack of alternating cation, anion, or bipolar membranes, ions are re-moved from a feed solution and purified and concentrated in a product or concentrate solution. Since the transport ofthe ions are done by electric power, electrodialysis processes do not consume equivalent quantities of acids, bases, or salts and do not produce a salt waste stream. When the ion concentration in the feed stream is low, i.e. below 0.5 to 1%, electrodialysis processes become unattractive because the low ionic conductivity in the dilute feed stream leads to very low flux and high energy consumption.
  • Electrodeionization also known as “electrochemical ion-exchange” is an advanced ion-exchange technology that combines the advantages of ion- exchange and electrodialysis.
  • ion-exchange resins are sequestered in dilute feed compartments to increase the ionic conductivity, so that even with an ionically dilute feed, a stable operation with higher flux and lower energy consumption than electrodialysis, becomes possible.
  • the electric power also splits the water (H 2 O) to H+ and OH- ions and the resins are thus regenerated while the ions are removed.
  • EDI technology is increasingly being used to make deionized water for boiler feed and high purity industrial water applications.
  • these pro-cess streams will have multiple types of ions, other contaminants and potential foulants, and high concentrations of organics, which cannot be lost from the feedstream.
  • the EDI devices for these applications must be easily dissembled for frequent cleaning.
  • process economics require that there is virtually no leakage between the product feed and the salt concentrate that is removed.
  • Many configurations and devices have been patented for electrodeionization.
  • Patents also exist (U.S. Patent Nos. 4,747,929 and 5,681,438) describing complex spacer construction configurations incorporating attached membranes and loose ion exchange resins interspersed between.
  • U.S. Patent 5,346,924 describes a method for making a non-porous ion exchange membrane using an ion exchange resin and binders such as polyethylene of linear low density or high density is described. These non-porous membranes are then described in an electrodeionization assembly with loose ion exchange resins in compartmentalized pockets that are similar to the previously described patents.
  • Another U.S. Patent 5,308,467 an apparatus that creates an ion exchange material from mono-filaments of cation and anion exchange material by radiation grafting is described and this ion exchange material can then be assembled between ion exchange membranes to make an electrodeionization apparatus.
  • EDI devices typically are utilized as a final polishing step in for already ultra pure water. As such, fouling of the rather complex compartmentalization and flow channels of EDI systems is relatively rare. Indeed, such systems are usually sealed upon manufacture inasmuch as the need for disassembly to facilitate cleaning is nil. Most of the current configurations develop small leaks from the dilute/feed compartments to the concentrate compartments. Whereas this is not a significant economic penalty for the production of ultra-pure water, such leaks cannot be tolerated for use with organic feedstreams where such losses from the feed would be uneconomical. In light of the foregoing, none of the current ED devices provide for having simple assembly and disassembly to facilitate cleaning and reuse. Also, none ofthe current EDI devices provide for virtually leak-free conditions between the feed compartment and the concentrate compartment. Such optimal characteristics are required for EDI devices used to treat process streams high in organic material content, such as corn syrups, glycerol and others.
  • Ion exchange beads that are commonly used for EDI applications consist of strongly acidic containing sulfonic acid groups, or strongly basic containing quaternary ammonium groups. Other resins such as those with weakly acidic (carboxylic acid) or weakly basic (amines) groups are also used when required. These beads are cross-linked polymers usually styrene - divinyl benzene or acrylates. The resins can be gel type or macro-reticular type. Usually equivalent mixtures of cationic and anionic resins are used in the EDI compartments. For specialized applications one type of resin or adsorbent beads mixed with ion- exchange resins may be used.
  • the material should be readily adaptable to current EDI stack configurations.
  • the material and device should not have ion-exchange particle leakage even at high flow rates, and the material should be regenerable in situ.
  • the material also should be produced with common substrates.
  • Another object ofthe present invention is to provide a porous but immobilized ion-exchange material.
  • a feature of the invention is that standard ion-exchange particles are combined with a binder material to immobilize them while also maintaining the molecular characteristics (such as porosity and internal surface area) ofthe particles.
  • An advantage of the invention is conferring a high degree of ionic conductivity between individual particles of the standard material while also allowing high throughput of the treated liquid stream.
  • Yet another object of the invention is to provide an economical method for subjecting feed streams to electrodeionization.
  • a feature of the invention is the utilization of a porous, immobilized ion-exchange material which provides ion- conductivities higher than the feed stream.
  • An advantage of the invention is the ability for the material to regenerate in situ.
  • the invention provides a porous immobilized ion-exchange material comprising ion-exchange resins having cation-exchange moieties and anion- exchange moieties; and a means for immobilizing the moieties relative to each other while conferring ion-conductivity and liquid permeability to the material.
  • an electrodeionization device comprising a cation-exchange membrane; an anion-exchange membrane juxtaposed co-planarly to said cation exchange membrane; porous ion-exchange material positioned intermediate said cation-exchange membrane and said anion exchange membrane to form a compartment, whereby the material comprises anion-exchange entities and cation exchange entities immobilized relative to each other; and a means for applying an electrical potential to said compartment.
  • the invention also provides for a method for subjecting a fluid to electrodeionization, the method comprising supplying a porous, ion-exchange material wherein the material comprises anion exchange entities and cation exchange entities immobilized relative to each other; applying an electrical potential across the material; contacting the fluid to the substrate so as to facilitate removal of ionic contaminants from the fluid; and simultaneous with step c, regenerating the resin, in situ.
  • FIG. 1 is a schematic depiction of an EDI process incorporating the invented porous immobilized ion-exchange material, in accordance with features of the present invention
  • FIG. 2 is a schematic depiction of an exemplary porous, immobilized ion- exchange material, in accordance with features of the present invention
  • FIG. 3A is a depiction of an exemplary porous immobilized ion-exchange material in communication with a stack gasket, in accordance with features of the present invention
  • FIG 3B is an expanded view of a portion of FIG 3A, taken along line 3-3;
  • FIG.4 is a flow diagram of an EDI device incorporating an exemplary porous immobilized ion-exchange material, in accordance with features of the present invention.
  • a porous, immobilized ion-exchange material and an EDI device incorporating the material is provided.
  • the device is unique for removing ionic contaminants from a feed stream without loss from the treated feed stream.
  • Typical impurities removed by the invented substrate and method include the chloride and sulfate salts of sodium and potassium, various organic acids, proteins, and color bodies.
  • a very suitable application for the invented material and device is in the purification of such fluids as corn sweetener syrups.
  • a general overview of an improved electrodeionization device is designated as numeral 10 in FIG. 1.
  • a salient feature of the device is a unique porous, immobilized ion-exchange material 12 which facilitates rapid deployment of ionic contaminants out of a diluate conduit, 14.
  • the material is removably positioned between (i.e., intermediate) a cation exchange membrane 16 and an anion exchange membrane 18, the entire triad therefore comprising a "cell compartment.”
  • a means for facilitating ion transport through this compartment is employed.
  • an electrical potential imparted via opposing electrodes 20, 22 provides the gradient to facilitate ion transfer out ofthe diluate conduit 14, and into the respective concentrate conduits 15.
  • An exemplary formulation of the material is that of making it into wafers of uniform thickness.
  • This wafer configuration confers the following three advantages to EDI processes: First, the inventors found that in very dilute solutions, where most of the deionization takes place, the ionic conductance of the wafer is higher than that of the solution itself. This means that the wafers will aid in the EDI process efficiency and increase throughput when compared to trying to deionize the solution itself. Second, when the wafers are incorporated in a standard ED stack configuration, no leakage between the compartments occurred, even when the flow rates were 5 to 10 fold higher than that used in typical EDI processes.
  • Finely dispersed latex emulsions that are micron sized elastomer emulsions are commonly used for coating surfaces.
  • fluorinated latex elastomers such as those sold under the trade name Fluorolast by Lauren Chemicals of New Philadelphia, Ohio, are available in aqueous medium with the fluoroelastomer emulsion particles in 0.5 to 2 microns in size.
  • fluoropolymers are chemically resistant to acids and alkali and are stable to moderately high temperatures up to 200 °C.
  • these elastomer dispersions are mixed with a catalytic curing agent which have aminoalkyl functionalities such as oligomeric aminoalkyl siloxanes. The mixture is then sprayed or spread on the surface to be coated. Upon drying the elastomer particles adhere to the surfaces as well get cross linked to each other and form a very durable non- porous coating.
  • these latex emulsions are suitable for making ion exchange materials with a high degree of porosity; in other words, when applied to ion-exchange resin beads, the latex was found not to coat the outer surfaces ofthe resin beads and render them unsuitable for ion-exchange or contaminant removal.
  • novel findings of this invention show that these aqueous elastomer latex emulsions when properly used can indeed produce a porous, immobilized, ion-exchange material from ion exchange resin beads which have the following highly desirable properties: - The molecular sized pores and the molecular porosity and the internal surface area of the resin and the beads are maintained.
  • the external surface are not be substantially coated or blinded to impede the passage of the ions and other impurities.
  • the material is very porous so that the liquid stream easily flows through it with little pressure drop or channeling.
  • the resin bead particles are in close contact so that the overall ion transport properties or mass transport properties are not substantially reduced when compared to the packed bed.
  • the immobilized matrix can handle the resins shrinking and swelling and does not fall apart.
  • the material has good mechanical properties it can be moved, handled, cut, squeezed and stretched.
  • the following is a general protocol for producing porous immobilized ion exchange material using a water-borne fluoroelastomer.
  • the fluoroelastomer FLUOROLAST ® was used to bind the mixed cation and anion resins to form a thick wafer.
  • the mixed resins used were the strong acid gel-type cation
  • C100E C100E
  • A444 strong base gel-type anion resins supplied by Purolite Inc.
  • Two different types of wafer were made using different resins that varied in particle size and particle size distribution. The following general procedure was used to make a wafer molded to fit inside a hollowed out and shaped rubber gasket. Such a wafer filled gasket could then be used in to make an EDI stack.
  • a concentration in the range of 35 - 70% w w of fluoroelastomer in emulsion was mixed with 2-10% w/w of the aminoxyl siloxane catalyst/curing agent.
  • the mixed cation and anion resins were packed, in wet form, into the rubber mold gasket. This was approximately 6 millimeter thick and shaped to have inlet and outlet ports that would become suitable for use in an EDI stack.
  • a perforated supporting plate covered with one sheet of a nylon screen and additional perforated wax paper on the top ofthe screen was placed beneath the resin and mold gasket.
  • Fluoroelastomer solution was allowed to cure for approximately 15-60 minutes in air at room temperature before applying (pouring) onto the molded resin bed.
  • This material was examined under an optical microscope at a magnification ranging from 100 to 400.
  • a schematic drawing of the structure is shown in Figure 1.
  • the resin beads are connected to each other by strands of elastomer binding polymer with such strands (noted herein as dendrites) binding through only a small fraction of the resin beads surface area.
  • the material was very porous as evidenced by free passage of water that was dropped on top or on the side of the resin wafer.
  • the material was firm and could be taken out of the mold gasket, cut and shaped with a sharp knife. The material could be squeezed and stretched like an elastomeric material.
  • the ionic electrical resistance of this material was measured to determine its is ionic conductivity.
  • Low resistance i.e. high ionic conductivity, indicates that the transport to the ion exchange sites inside the resin beads is not blinded. It also indicates that the material is porous, allowing the bulk solution to flow while simultaneously confirming that the ion exchange beads are not separated far from each other by other ionically non conduction materials.
  • the ion electric resistance with and without a 6mm thick wafer made ofthe material were measured in solutions of different NaCI concentrations.
  • a four-point ac impedance measurement (LCZ 3321 , Keithley Instruments, Inc., Cleveland, OH) was used to determine the ion electric resistance of the resin wafer.
  • the high ionic resistance ofthe solution was lowered by the presence of resin wafer when the NaCI concentrations were less than 500 ppm. This means that this material has good ionic conductivity and would aid in the transport of ions from dilute solutions.
  • Wafers were manufactured using 15 to 20 weight percent polyethylene as binding material.
  • the ion exchange resins used in one wafer were the macro- reticular type of strong acid cation exchange resin (Purolite C-155), available from Purolite, Inc., Bala Cynwyd, PA. and the gel type of strong base anion exchange resin (Purolite A-444).
  • the resins and the polyethylene were mixed, heated and molded to produce a porous wafer. Each wafer is 6.0 mm thick. The average thickness variations of different spots on one single wafer is less than 0.5% (i.e., 0.05 mm).
  • the ion electric resistances ofthe solution with and without resin wafer were measured in different NaCI concentrations.
  • a four-points ac impedance measurement (LCZ 3321 , Keithley Instruments, Inc., Cleveland, Ohio) was used to acquire the ion electric resistance of the resin wafer.
  • the high electric resistances of the solution were improved by the presence of resin wafer when the NaCI concentrations were less than 50 ppm.
  • Most of the use of electrodeionization (EDI) technology need to reduce the ion concentration to less than 50 ppm. Therefore, the resin wafer can be very suitable for use in the EDI process.
  • the desalting performance of an electrodeionization stack using the resin wafer was tested.
  • the resin wafers was packed using an electrodialysis stack (TS-1)
  • the electrodeionization i.e., desalting
  • the electrodeionization was operated in a continuous process with 500 mg/L of NaCI as the feed solution.
  • Four liters of 5000 mg/L NaCI solution was circulated in the concentrate compartment.
  • Three wt.% Na 2 SO 4 was used as the electrolytic rinse solution.
  • Table 3 shows the desalting capability of the resin wafer stack. A NaCI removal efficiency of 70% in the feed stream was achieved using this prototype resin wafer stack with a single pass through.
  • Wafers were manufactured using an average of 30 weight percent (range of 25 to 35 weight percent) of a binding material, such as polyethylene.
  • Strong acid cation exchange resin of the gel type and strongly basic anion exchange resin ofthe gel type were used in making these wafers.
  • Exemplary acid cation exchange resins, and basic anion exchange resins include , Purolite C-155), and Purolite A 444), respectively, both available from Purolite, Inc. Bala Cynwyd, PA.
  • These rigid molded wafers were 3 mm in thickness and had a porosity of approximately 35% free liquid space. Water and other solutions flowed freely through the wafer with little resistance and pressure drop. For example, at a flow rate of a dextrose (30 wt%) solution at 30 ml/min.cm 2 across the width of the wafer, a pressure drop of only 6 pounds per square inch was required. These wafers had very good ionic conductivities and were used for desalination of salt solution in water and deionization of carbohydrate containing solutions.
  • the wafers were cut and fitted into rubber gaskets and sandwiched between cation and anion exchange membranes in a typical electrodialysis stack (e.g., TS-2, Tokuyama, Inc.) as described in the eariier examples.
  • a typical electrodialysis stack e.g., TS-2, Tokuyama, Inc.
  • the stack assembly was then connected to the flow pumps and power supply and operated for the deionization tests.
  • the porous immobilized ion-exchange material can be shaped into a myriad of configurations, depending on the EDI device utilized. Fortypical stack configurations, which incorporate a plurality of diluant and concentrate compartments, wafers of the material, having relatively uniform thicknesses of between approximately 2 and 6 millimeters, are preferable. The wafers are suitably porous with between 20 percent and 60 percent porosity so that a liquid will flow through it with minimal resistance and the resin beads should be uniformly dispersed in close proximity to each other. "Porosity" is construed herein as the macroscopic void space that can be filled by a liquid.
  • a wafer 30 is cut into a form that is used in typical electrodialysis stacks.
  • the wafer 30 is generally secured in an opening 34 defined by the rubber gasket, via adhesive (such as the silicone caulking 36 depicted in 3B), or via friction which occurs upon swelling of the wafer once wet.
  • adhesive such as the silicone caulking 36 depicted in 3B
  • the swelling phenomenon is due to the expansion of the resin particles in the wafer.
  • a schematic depiction of a stack assembly with diluting/feed compartments, the concentrate compartments, and the invented porous, immobilized ion-exchange material is designated as numeral 100 in Figure 4.
  • the assembly 100 is a flow diagram of a typical electrodialysis stack assembly.
  • the diluate compartment 41 is formed from the juxtaposition of the wafer 30 intermediate the cation exchange membrane 16 and anion exchange membrane 18, upstream from the concentrating compartment, 43.
  • the concentrating compartment 43 also can be fitted with a wafer so that there are no force imbalances on the membranes. This assures that the wafers are evenly pressed on the membranes, thereby preventing flow channeling between the membranes and the wafers while also facilitating sealing between the compartments.
  • an untreated feedstream 46 enters the stack assembly 100.
  • the feedstream permeates upwardly, in the direction of the arrows, while simultaneously being subjected to the effect ofthe anionic exchange membrane 18 and cationic exchange membrane 16.
  • anions and cations are pulled off of the ion-exchange resin particles as a result of an electrical potential (not shown) applied to the stack. This facilitates regeneration of the wafer co n stitu e nts in situ.
  • diluate liquid i.e., feed stream liquid sans ionic contaminant
  • concentrated salt solution is removed via transportthrough separate concentrate conduits 42 and ultimatelyfrom the stack assembly through concentrate exit ports 44.
  • Concentrate ports 36 direct extracted ionic contaminants out ofthe stack and in a direction opposite the flow of the treated diluant.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Urology & Nephrology (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un matériau échangeur d'ions (30), poreux, immobilisé, fixé dans une ouverture (34). Elle concerne également un dispositif d'électrodésionisation comprenant ce matériau( 30), de même qu'un procédé consistant à soumettre un fluide à une électrodésionisation, au moyen du matériau échangeur d'ions (30), poreux et immobilisé, ce matériau (30) possédant la caractéristique remarquable de pouvoir être régénéré.
EP00954125A 1999-08-18 2000-08-17 Substrat d'electrodesionisation et dispositif destine a un traitement d'electrodesionisation Withdrawn EP1235622A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37623899A 1999-08-18 1999-08-18
US376238 1999-08-18
PCT/US2000/022624 WO2001012292A1 (fr) 1999-08-18 2000-08-17 Substrat d'electrodesionisation et dispositif destine a un traitement d'electrodesionisation

Publications (2)

Publication Number Publication Date
EP1235622A1 true EP1235622A1 (fr) 2002-09-04
EP1235622A4 EP1235622A4 (fr) 2003-05-07

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EP00954125A Withdrawn EP1235622A4 (fr) 1999-08-18 2000-08-17 Substrat d'electrodesionisation et dispositif destine a un traitement d'electrodesionisation

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EP (1) EP1235622A4 (fr)
AU (1) AU6646000A (fr)
CA (1) CA2378334A1 (fr)
WO (1) WO2001012292A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10032686A1 (de) * 2000-07-05 2002-01-31 G E R U S Ges Fuer Elektrochem Poröser von Wasser durchströmbarer Körper aus Ionenaustauscherharz und Verfahren zu seiner Herstellung
US7427345B2 (en) 2001-11-29 2008-09-23 Ebara Corporation Method and device for regenerating ion exchanger, and electrolytic processing apparatus
WO2003101894A2 (fr) * 2002-05-30 2003-12-11 Lobo Liquids, Llc Procede et appareil permettant de traiter des flux contenant des ions metalliques
US6797140B2 (en) * 2002-08-06 2004-09-28 The University Of Chicago Electrodeionization method
US7306934B2 (en) * 2002-11-05 2007-12-11 Uchicago Argonne, Llc Porous solid ion exchange wafer for immobilizing biomolecules
US7452920B2 (en) 2004-09-17 2008-11-18 Uchicago Argonne, Llc Electronically and ionically conductive porous material and method for manufacture of resin wafers therefrom
KR20140014217A (ko) * 2011-03-10 2014-02-05 쓰리엠 이노베이티브 프로퍼티즈 컴파니 여과 매체
US10651493B2 (en) * 2013-06-07 2020-05-12 The Board Of Trustees Of The University Of Arkansas Reverse electrodialysis systems comprising wafer and applications thereof
WO2014210126A1 (fr) * 2013-06-25 2014-12-31 Ionic Solutions Ltd. Procédé et appareil pour la régulation du flux osmotique dans des systèmes d'électrodialyse

Citations (2)

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Publication number Priority date Publication date Assignee Title
US5346924A (en) * 1992-09-23 1994-09-13 Ip Holding Company Heterogeneous ion exchange materials comprising polyethylene of linear low density or high density high molecular weight
EP0865816A2 (fr) * 1997-03-19 1998-09-23 Asahi Glass Company Ltd. Appareil de production d'eau déminéralisée

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY113226A (en) * 1995-01-19 2001-12-31 Asahi Glass Co Ltd Porous ion exchanger and method for producing deionized water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346924A (en) * 1992-09-23 1994-09-13 Ip Holding Company Heterogeneous ion exchange materials comprising polyethylene of linear low density or high density high molecular weight
US5346924B1 (en) * 1992-09-23 2000-04-25 Ionpure Techn Corp Heterogenous ion exchange materials comprising polyethylene of linear low density or high density high molecular weight
EP0865816A2 (fr) * 1997-03-19 1998-09-23 Asahi Glass Company Ltd. Appareil de production d'eau déminéralisée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0112292A1 *

Also Published As

Publication number Publication date
CA2378334A1 (fr) 2001-02-22
EP1235622A4 (fr) 2003-05-07
WO2001012292A1 (fr) 2001-02-22
AU6646000A (en) 2001-03-13

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