And Ion Exchange Material (e.g., Suspended Ion Exchange Resin Particles, Etc.) Patents (Class 204/632)
  • Patent number: 11219861
    Abstract: Inflow branch pipes of water to be treated, which are branched from an inflow line of the water to be treated, which is provided on an upper side of desalination chambers of an electrodeionization apparatus, communicate with the desalination chambers, respectively. Both ends of the inflow line of the water to be treated are opened, and a supply pipe of the water to be treated communicates with each of the ends so that the water to be treated can be supplied from both sides. In addition, in a lower side of each of the desalination chambers, outflow pipes of treated water, communicate with each other, and these outflow pipes each join an outflow line of the treated water. In addition, both ends of the outflow line of the water to be treated are opened so that the treated water can be discharged from both sides. According to such an electrodeionization apparatus, it is possible to suppress an increase in a differential pressure during passage of water.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 11, 2022
    Assignee: KURITA WATER INDUSTRIES LTD.
    Inventors: Yoichi Miyazaki, Yuichiro Wada, Kouichi Nagata
  • Patent number: 11174179
    Abstract: A flocculant for treating a processing waste liquid into fresh water being formed by pulverizing an ion exchange resin for purification of fresh water into pure water to a size of 100 ?m or below. With the ion exchange resin pulverized and used as a flocculant, it is ensured that even when the processing waste liquid is subjected to flocculation and separation, the fresh water separated from the processing debris does not show an increased electric conductivity, and worsening of water quality can be restrained. In addition, since the flocculant is pulverized down to a size of 100 ?m or below, flocculation of the processing debris is promoted.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: November 16, 2021
    Assignee: DISCO CORPORATION
    Inventors: Miki Yoshida, Kei Mine
  • Patent number: 10662085
    Abstract: A low energy water treatment system and method is provided. The system has at least one electrodialysis device that produces partially treated water and a brine byproduct, a softener, and at least one electrodeionization device. The partially treated water stream can be softened by the softener to reduce the likelihood of scale formation and to reduce energy consumption in the electrodeionization device, which produces water having target properties. At least a portion of the energy used by the electrodeionization device can be generated by concentration differences between the brine and seawater streams introduced into compartments thereof. The brine stream can also be used to regenerate the softener.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 26, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Gary C. Ganzi, Li-Shiang Liang, Frederick C. Wilkins
  • Patent number: 10472261
    Abstract: A method for purifying waste water, and a dual chamber purification system, in which feed water may be passed first through a hybrid anion exchange unit, and subsequently through a weak acid cationic exchange unit. The hybrid anion exchanger may comprise a hybrid sorbent (HAIX-NanoZr) with dual functional sorption sites. The weak acid cationic exchanger may be a fiber having a shell-core physical configuration with relatively short intra-particle diffusion path length so that the ion exchange sites reside predominantly on the periphery. The system may be used to achieve partial desalination or TDS reduction and concurrent removal of target contaminants (e.g., phosphate, hardness). Further, the system may be regenerated using CO2 as the sole regenerant for both the hybrid anion exchanger and the weak acid cationic exchanger, thus producing spent regenerant with no externally added chemicals.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: November 12, 2019
    Assignee: LEHIGH UNIVERSITY
    Inventors: Arup K. SenGupta, Hang Dong, Michael German, Chelsey Shepsko
  • Patent number: 10391456
    Abstract: Methods for improving ion flux and energy efficiency in a membrane stack of an electrodialysis unit wherein the membrane stack is disposed between an anode and a cathode each in an electrolyte of a selected concentration. Methods include increasing the concentration of the electrolyte, adding a strong base to the electrolyte and adding buffering anions to the electrolyte. Methods for cleaning the electrodes of such a unit involving involve applying a pulsed polarity reversal to the electrodes. Also provided are methods for improving unit operation by increasing the basicity of the electrolyte to the anode and increasing the acidity of the electrolyte to the cathode or alternatively or in addition, by applying heat to increase the operating temperature of at least one of the electrolyte and the treated water stream.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: August 27, 2019
    Assignee: GAS TECHNOLOGY INSTITUTE
    Inventors: Thomas D. Hayes, Blaine F. Severin
  • Patent number: 10259728
    Abstract: A device and process are disclosed for the separate removal of oppositely charged ions from electrolyte solutions and recombining them to form new chemical compositions. The invention provides the ability to create multiple ion flow channels and then form new chemical compositions therefrom. The process is accomplished by selectively combining oppositely charged ions of choice from different electrolyte solutions via the capacitive behavior of high electrical capacitance electrodes confined in insulated containers.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: April 16, 2019
    Assignee: IONIC SOLUTIONS LTD.
    Inventor: Azaroghly Yazdanbod
  • Patent number: 10058858
    Abstract: Methods and systems for an integrated acid regeneration of ion exchange resins are disclosed for use in cleaning applications. Acid resins designed for use in a variety of cleaning application using a treated, softened, acidic water source are disclosed. Various methods of using the softened acidic water generated by acid regenerate-able ion exchange resins within a cleaning application, e.g. ware wash machine, are disclosed to beneficially reduce spotting, filming and scale buildup on treated surfaces, reduce and/or eliminate the need for polymers, threshold reagents and/or rinse aids, and using protons generated in the acidic water effluent for triggering events useful in various cleaning applications.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 28, 2018
    Assignee: ECOLAB USA INC.
    Inventors: Terrence P. Everson, Li Wen, Lylien Tan, Peter Voss, Mark Toetschinger
  • Patent number: 10035105
    Abstract: A process for preparing a membrane stack comprising the steps of (i) interposing a curable adhesive between alternate anion exchange membranes and cation exchange; and (ii) curing the adhesive; CHARACTERIZED IN THAT said membranes are in a swollen state when step (ii) is performed.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: July 31, 2018
    Assignee: Fujifilm Manufacturing Europe B.V.
    Inventors: Vinodnarain Bhikhi, Peter Jessen, Willem Van Baak, Johannes Van Engelen, Bastiaan Van Berchum
  • Patent number: 10011506
    Abstract: A system for removing minerals from a brine using electrodialysis. One system includes a gypsum removal system configured to receive a feed stream having a first amount of gypsum, to extract at least a portion of the gypsum from the feed stream, and to produce a first output having a second amount of the gypsum less than the first amount of the gypsum. The system also includes an electrodialysis (ED) system fluidly coupled to the gypsum removal system and configured to receive the first output from the gypsum removal system, to produce a second output having a substantially sulfate hardness free sodium sulfate solution, to produce a third output having a sodium chloride solution, and to produce a fourth output having a mineral solution.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: July 3, 2018
    Assignee: Enviro Water Minerals Company, Inc.
    Inventor: Paul Steven Wallace
  • Patent number: 9764321
    Abstract: Methods and systems for an integrated acid regeneration of ion exchange resins are disclosed for use in cleaning applications. Acid resins designed for use in a variety of cleaning application using a treated, softened, acidic water source are disclosed. Various methods of using the softened acidic water generated by acid regenerate-able ion exchange resins within a cleaning application, e.g. ware wash machine, are disclosed to beneficially reduce spotting, filming and scale buildup on treated surfaces, reduce and/or eliminate the need for polymers, threshold reagents and/or rinse aids, and using protons generated in the acidic water effluent for triggering events useful in various cleaning applications.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: September 19, 2017
    Assignee: Ecolab USA, Inc.
    Inventors: Terrence P. Everson, Li Wen, Lylien Tan, Peter Voss, Mark Toetschinger
  • Patent number: 9643864
    Abstract: A method and liquid purifying device for controlling concentration of ions in a liquid includes generating a main stream of liquid in a main channel and applying a transverse electric field to the main stream by electrodes that are electrically in direct contact with the liquid flowing in the main channel. Further, a product stream of liquid is derived from a central region of the main stream, and waste streams of liquid are derived from regions of the main stream closer to the electrodes.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: May 9, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Alwin Verschueren
  • Patent number: 9535034
    Abstract: A suppressor is structured by an ion exchange section being structured by an eluate path forming member forming an eluate path and a regenerant path forming member forming a regenerant path being stacked across an ion exchange film, and a heat-conductive heat block covering the outside of the ion exchange section. A separation column, the suppressor, and an electrical conductivity meter are accommodated in a common constant temperature bath. The inside of the constant temperature bath is feedback-controlled by a temperature control section so as to be maintained at constant temperature.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: January 3, 2017
    Assignee: SHIMADZU CORPORATION
    Inventors: Katsumasa Sakamoto, Yukio Oikawa, Shigeyoshi Horiike
  • Patent number: 9481586
    Abstract: A desalination system is provided. The desalination system comprises a desalination apparatus. The desalination apparatus comprises first and second electrodes, and a first group of paired ion exchange membranes disposed between the first and second electrodes to form a first group of alternating first and second channels. The first channels are configured to receive a first stream for desalination and the second channels are configured to receive a second stream to carry away ions removed from the first stream, respectively. The desalination apparatus further comprises a plurality of spacers disposed between each pair of the adjacent ion exchange membranes and between the first and second electrodes and the respective ion exchange membranes. Wherein each of the ion exchange membranes in the first group is a cation exchange membrane. A desalination system and a method for removing ions from an aqueous stream area also presented.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: November 1, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Rihua Xiong, Linglu Yang
  • Patent number: 9481585
    Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: November 1, 2016
    Assignee: Evoqua Water Technologies Pte. Ltd
    Inventors: Li-Shiang Liang, Keng Hoo Yeo, Zhee Min Jimmy Yong
  • Patent number: 9260325
    Abstract: It is an object of the present invention to provide an electrical deionization apparatus having a novel constitution with excellent deionization efficiency. As means for solving this problem, according to one embodiment of the present invention, there is provided an electrical deionization apparatus having deionization compartments, concentration compartments and electrode compartments partitioned from one another by a plurality of ion exchange membranes between a cathode and an anode, wherein, in the deionization compartments and/or the concentration compartments and/or the electrode compartments, at least one of anion exchange fibrous material layers and cation exchange fibrous material layers are disposed on one another intersecting a water-passing direction.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: February 16, 2016
    Assignee: SWING CORPORATION
    Inventors: Yohei Takahashi, Syu Nakanishi
  • Patent number: 9139455
    Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: September 22, 2015
    Assignee: Evoqua Water Technologies Pte. Ltd.
    Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
  • Patent number: 9096941
    Abstract: The present invention relates to an electrolytic cell for an FT-CDI including: an injection port into which a bead and a concentrate are injected and a discharge port through which the bead and the concentrate are discharged to circulate the bead, thereby preventing the concentration of the bead from being degraded and disposes a mesh at a place in which the concentrate and the bead are received to disperse the concentrate and the bead well.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: August 4, 2015
    Assignees: The Industry & Academic Cooperation in Chungnam National University, Pusan National University Industry-University Cooperation Foundation
    Inventors: Teak Sung Hwang, Sung-Gyu Park, Hui-Man Park, Noh-Seok Kwak, Chi Won Hwang, Chang-Sik Ha
  • Patent number: 9023185
    Abstract: An electrochemical treating device having low scale potential is disclosed. The device has a variety of configurations directed to the layering of the anionic exchange and cationic exchange. The treatment device can also comprise unevenly sized ion exchange resin beads and/or have at least one compartment that provides a dominating resistance that results in a uniform current distribution throughout the apparatus.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 5, 2015
    Assignee: Evoqua Water Technologies LLC
    Inventors: Joseph D. Gifford, John W. Arba, Evgeniya Freydina, Anil D. Jha, Li-Shiang Liang, Lu Wang
  • Patent number: 9011664
    Abstract: It is an object of the present invention to provide an electrical deionization apparatus having a novel constitution with excellent deionization efficiency. As means for solving this problem, according to one embodiment of the present invention, there is provided an electrical deionization apparatus having deionization compartments, concentration compartments and electrode compartments partitioned from one another by a plurality of ion exchange membranes between a cathode and an anode, wherein, in the deionization compartments and/or the concentration compartments and/or the electrode compartments, at least one of anion exchange fibrous material layers and cation exchange fibrous material layers are disposed on one another intersecting a water-passing direction.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: April 21, 2015
    Assignee: Swing Corporation
    Inventors: Yohei Takahashi, Syu Nakanishi
  • Patent number: 9005440
    Abstract: Systems and methods for hemodialysis or peritoneal dialysis having integrated electrodialysis and electrodeionization capabilities are provided. In an embodiment, the dialysis system includes a carbon source, a urease source, an ED/EDI unit. The carbon source, urease source, and/or the ED/EDI unit can be in the form of removable cartridges.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: April 14, 2015
    Assignees: Baxter International Inc., Baxter Healthcare S.A.
    Inventors: Rongsheng Lin, Yuanpang Samuel Ding, James M. White, Ye Chen, Ying-Cheng Lo, Joshua Miller, Justin Rohde
  • Patent number: 8999132
    Abstract: A liquid electrolyte can be desalinated and purified using a system that includes a first electrode and a configuration selected from (a) a second electrode and at least one distinct ion-selective boundary and (b) a second electrode that also serves as the ion-selective boundary. The ion-selective boundary is contained in the liquid conduit adjacent to a porous medium that defines pore channels filled with the liquid and that have a surface charge, and the charge of the ion-selective boundary and the surface charge of the pore channels share the same sign. A liquid including at least one charged species flows through the pore channels, forming a thin diffuse electrochemical double layer at an interface of the liquid and the charged surface of the pore channels.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: April 7, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Martin Zdenek Bazant, EthelMae Victoria Dydek, Daosheng Deng, Ali Mani
  • Patent number: 8968965
    Abstract: A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 12 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and a cationic group; (iii) 10 to 70 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; and (v) non-curable salt; wherein the molar ratio of (i):(ii) is >0.10. The compositions are useful for preparing ion exchange membranes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: March 3, 2015
    Assignee: Fujifilm Manufacturing Europe BV
    Inventors: Harro Antheunis, Jacko Hessing, Bastiaan Van Berchum
  • Patent number: 8968964
    Abstract: A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 12 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and a cationic group; (iii) 10 to 70 wt % solvent; (iv) 0 to 10 wt % of free radical initiator; and (v) lithium and/or calcium salt. The compositions are useful for preparing ion exchange membranes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: March 3, 2015
    Assignee: Fujifilm Manufacturing Europe BV
    Inventors: Harro Antheunis, Jacko Hessing, Bastiaan Van Berchum
  • Patent number: 8968963
    Abstract: A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 20 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group; (iii) 15 to 45 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; wherein the molar ratio of (i):(ii) is 0.1 to 1.5. The compositions are useful for preparing ion exchange membranes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: March 3, 2015
    Assignee: Fujifilm Manufacturing Europe BV
    Inventors: Bastiaan Van Berchum, Jacko Hessing, Harro Antheunis
  • Patent number: 8956782
    Abstract: A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 20 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group; (iii) 15 to 45 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; wherein the composition has a pH of 0.8 to 12. The compositions are useful for preparing ion exchange membranes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: February 17, 2015
    Assignee: Fujifilm Manufacturing Europe BV
    Inventors: Bastiaan Van Berchum, Jacko Hessing, Harro Antheunis
  • Patent number: 8956783
    Abstract: A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 12 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and a cationic group; (iii) 15 to 70 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; and (v) 2 to 50 wt % of non-curable salt; wherein the composition has a pH of 1 to 12. The compositions are useful for preparing ion exchange membranes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: February 17, 2015
    Assignee: Fujifilm Manufacturing Europe BV
    Inventors: Harro Antheunis, Jacko Hessing, Bastiaan Van Berchum
  • Publication number: 20150041323
    Abstract: The invention relates to a salt solution electrodialysis cell for production of the relevant acids and bases by means of a process with reduced or nil consumption of electrical energy. The cell comprises an anodic chamber fed with hydrogen and a cathodic chamber fed with oxygen or air, provided with the relevant gas-diffusion electrodes; the driving power of the electrodialysis process is given by the oxidation and reduction chemical potentials of hydrogen and oxygen fed to the two chambers.
    Type: Application
    Filed: March 28, 2012
    Publication date: February 12, 2015
    Applicant: Industrie De Nora S.p.A.
    Inventor: Giuseppe Faita
  • Publication number: 20150027890
    Abstract: The methods and systems disclosed here relate to treating water. In certain embodiments, a treatment system comprises an electrochemical water treatment device, a recirculating concentrate stream in fluid communication with the electrochemical water treatment device, a flow control device in fluid communication with a first flow path comprising acidic water and configured to be in fluid communication with the recirculating concentrate stream, and a second flow path comprising feed water and configured to be in fluid communication with the recirculating concentrate stream, and a control system in communication with the flow control device. The treatment system may further comprise a recirculating dilution stream in fluid communication with a second inlet and a second outlet of the electrochemical water treatment device.
    Type: Application
    Filed: January 22, 2013
    Publication date: January 29, 2015
    Applicant: HYDRONOVATION, INC.
    Inventors: Anil D. Jha, Ramandeep Mehmi
  • Patent number: 8926818
    Abstract: The present invention relates generally to the deionization of liquids through the use of electrodeionization methods and apparatuses. The apparatuses are configured to produce purified liquids having an ion content at a level of parts-per-trillion or less, and to provide continuous regeneration of the ion exchange materials. The apparatuses may be configured according to the desired levels of deionization for anions, cations, or both. Finally, methods are presented for various uses of the claimed apparatus.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: January 6, 2015
    Assignee: Trovion Singapore Pte. Ltd.
    Inventor: John M. Riviello
  • Patent number: 8894834
    Abstract: A water treatment system provides treated or softened water to a point of use by removing a portion of any hardness-causing species contained in water from a point of entry coming from a water source, such as municipal water, well water, brackish water and water containing foulants. The water treatment system typically treats the water containing at least some undesirable species before delivering the treated water to a point of use. The water treatment system has a reservoir system in line with an electrochemical device such as an electrodeionization device. The water treatment system has a sensor or a set of sensors for measuring at least one property of the water or an operating condition of the treatment system.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: November 25, 2014
    Assignee: Evoqua Water Technologies LLC
    Inventors: Evgeniya Freydina, Anil D. Jha, Frederick Wilkins, Aytac Sezgi, Reshma Madhusudan
  • Publication number: 20140332386
    Abstract: Ion Concentration Polarization (ICP) purification devices and methods for building massively-parallel implementations of the same, said devices being suitable for separation of salts, heavy metals and biological contaminants from source water.
    Type: Application
    Filed: May 20, 2014
    Publication date: November 13, 2014
    Applicant: Massachusetts Institute of Technology
    Inventors: Bumjoo Kim, Sung Jae Kim, Jongyoon Han
  • Publication number: 20140332387
    Abstract: A sandwich suppressor in an ion chromatography system in which loosely packed ion exchange resin of low density is disposed in the central sample stream flow channel. Also, a method of using the suppressor is described.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 13, 2014
    Inventors: Kannan SRINIVASAN, Christopher A. POHL, Sheetal BHARDWAJ, Rong LIN
  • Patent number: 8871073
    Abstract: An electrodeionization apparatus for producing deionized water comprises a deionization treatment unit including deionization chamber D and a pair of concentration chambers C1 and C2 placed adjacent to deionization chamber D on opposite sides thereof and those concentration chambers are filled with anion exchangers. The deionization chamber D is partitioned by an ion exchange membrane into first small deionization chamber D-1 adjacent to concentration chamber C1 and second small deionization chamber D-2 adjacent to concentration chamber C2. First small deionization chamber D-1 is filled with an anion exchanger. Second small deionization chamber D-2 is filled with an anion exchanger and a cation exchanger in a sequence such that the ion exchanger, through which water that is to be treated finally passes, is the anion exchanger.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 28, 2014
    Assignee: Organo Corporation
    Inventors: Kazuya Hasegawa, Yuji Asakawa, Keisuke Sasaki
  • Patent number: 8864963
    Abstract: The present invention provides a resin-wafer electrodeionization (RW-EDI) apparatus including cathode and anode electrodes separated by a plurality of porous solid ion exchange resin wafers, which when in use are filled with an aqueous fluid. The apparatus includes one or more wafers comprising a basic ion exchange medium, and preferably includes one or more wafers comprising an acidic ion exchange medium. The wafers are separated from one another by ion exchange membranes. The fluid within the acidic and/or basic ion exchange wafers preferably includes, or is in contact with, a carbonic anhydrase (CA) enzyme to facilitate conversion of bicarbonate ion to carbon dioxide within the acidic medium. A pH suitable for exchange of CO2 is electrochemically maintained within the basic and acidic ion exchange wafers by applying an electric potential across the cathode and anode.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: October 21, 2014
    Assignee: UChicago Argonne, LLC
    Inventors: YuPo J. Lin, Seth W. Snyder, Michael C. Trachtenberg, Robert M. Cowan, Saurav Datta
  • Publication number: 20140246318
    Abstract: A desalination system comprises at least one desalination cell. The at least one desalination cell comprises first and second electrodes, an anion exchange layer and a cation ion exchange layer disposed on the respective first and second electrodes, and a spacer disposed between the first and second electrodes. The at least one desalination cell further comprises an ion exchange resin disposed between the first and second electrodes. A desalination system and a method for removing ions from an aqueous stream are also presented.
    Type: Application
    Filed: September 19, 2012
    Publication date: September 4, 2014
    Inventors: Linglu Yang, Hai Yang, Wei Lu, John Harold Barber
  • Patent number: 8801910
    Abstract: A liquid electrolyte can be desalinated and purified using a system that includes a first electrode and a configuration selected from (a) a second electrode and at least one distinct ion-selective boundary and (b) a second electrode that also serves as the ion-selective boundary. The ion-selective boundary is contained in the liquid conduit adjacent to a porous medium that defines pore channels filled with the liquid and that have a surface charge, and the charge of the ion-selective boundary and the surface charge of the pore channels share the same sign. A liquid including at least one charged species flows through the pore channels, forming a thin diffuse electrochemical double layer at an interface of the liquid and the charged surface of the pore channels.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: August 12, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Martin Zdenek Bazant, EthelMae Victoria Dydek, Daosheng Deng, Ali Mani
  • Publication number: 20140209462
    Abstract: A desalination system is provided. The desalination system comprises a desalination apparatus. The desalination apparatus comprises first and second electrodes, and a first group of paired ion exchange membranes disposed between the first and second electrodes to form a first group of alternating first and second channels. The first channels are configured to receive a first stream for desalination and the second channels are configured to receive a second stream to carry away ions removed from the first stream, respectively. The desalination apparatus further comprises a plurality of spacers disposed between each pair of the adjacent ion exchange membranes and between the first and second electrodes and the respective ion exchange membranes. Wherein each of the ion exchange membranes in the first group is a cation exchange membrane. A desalination system and a method for removing ions from an aqueous stream area also presented.
    Type: Application
    Filed: August 13, 2012
    Publication date: July 31, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rihua Xiong, Linglu Yang
  • Patent number: 8758954
    Abstract: Membranes and processes for preparing membranes having weakly acidic or weakly basic groups comprising the steps of: (i) applying a curable composition to a support; (ii) curing the composition for less than 30 seconds to form a membrane; and (iii) optionally removing the membrane from the support; wherein the curable composition comprises a crosslinking agent having at least two acrylic groups. The membranes are particularly useful for producing electricity by reverse electrodialysis.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: June 24, 2014
    Assignee: Fujifilm Manufacturing Europe B.V.
    Inventors: Willem Johannes Van Baak, Johannes Adrianus Wilhelmus Van Engelen, Dana Manuela Sterescu
  • Publication number: 20140166488
    Abstract: Highly energy efficient electrodialysis membranes having low operating costs and a novel process for their manufacture are described herein. The membranes are useful in the desalination of water and purification of waste water. They are effective in desalination of seawater due to their low electrical resistance and high permselectivity. These membranes are made by a novel process which results in membranes significantly thinner than prior art commercial electrodialysis membranes. The membranes are produced by polymerizing one or more monofunctional ionogenic monomers with at least one multifunctional monomer in the pores of a porous substrate.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicant: EVOQUA WATER TECHNOLOGIES PTE. LTD.
    Inventors: Juchui Ray Lin, George Y. Gu
  • Publication number: 20140158538
    Abstract: Systems and methods for managing the potassium concentration of a dialysate fluid during hemodialysis therapy using cation exchange materials that do not release sodium ions.
    Type: Application
    Filed: February 2, 2013
    Publication date: June 12, 2014
    Applicant: Medtronic, Inc.
    Inventors: Kenneth J. COLLIER, Martin T. Gerber, David B. Lura, Thomas E. Meyer, Bryant J. Pudil
  • Patent number: 8741121
    Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: June 3, 2014
    Assignee: Evoqua Water Technologies LLC
    Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
  • Publication number: 20140144779
    Abstract: A capacitive deionization apparatus may include at least one pair of porous electrodes and a spacer structure disposed between the at least one pair of electrodes. The at least one pair of porous electrodes may include an electrode material having a surface area for the electrostatic adsorption of feed ions. The spacer structure may include an electrically-insulating material with an ion exchange group on the surface thereof. The spacer structure provides a path for flowing a fluid therethrough.
    Type: Application
    Filed: September 27, 2013
    Publication date: May 29, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joon Seon JEONG, Hyun Seok KIM, Da Hye PARK, Dong Jin HAM, Hyo Rang KANG
  • Patent number: 8721862
    Abstract: The present invention generally relates to devices able to purify fluids electrically that are contained within pressure vessels, as well as to methods of manufacture and use thereof. Liquids or other fluids to be purified enter the purification device and, under the influence of an electric field, are treated to produce an ion-depleted liquid. Species from the entering liquids are collected to produce an ion-concentrated liquid. Increasing the exterior pressure on the device may reduce the pressure difference between the interior of the device and the exterior, which may reduce manufacturing costs or simplify construction.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: May 13, 2014
    Assignee: Evoqua Water Technologies LLC
    Inventors: Li-Shiang Liang, Emile Montminy
  • Patent number: 8709225
    Abstract: The present invention relates generally to the deionization of liquids through the use of electrodeionization methods and apparatuses. The apparatuses may be configured to minimize the fouling of the electrode chambers and to provide continuous regeneration of the ion exchange materials. The apparatuses may be configured according to the desired levels of deionization for anions, cations, or both. Finally, methods are presented for various uses of the apparatuses.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: April 29, 2014
    Assignee: Trovion Singapore Pte. Ltd., Co.
    Inventor: John M. Riviello
  • Patent number: 8679314
    Abstract: The present invention provides an efficient method for creating natural gas including the anaerobic digestion of biomass to form biogas, and the electrodeionization of biogas to form natural gas and carbon dioxide using a resin-wafer deionization (RW-EDI) system. The method may be further modified to include a wastewater treatment system and can include a chemical conditioning/dewatering system after the anaerobic digestion system. The RW-EDI system, which includes a cathode and an anode, can either comprise at least one pair of wafers, each a basic and acidic wafer, or at least one wafer comprising of a basic portion and an acidic portion. A final embodiment of the RW-EDI system can include only one basic wafer for creating natural gas.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: March 25, 2014
    Assignee: U.S. Department of Energy
    Inventors: Seth W. Snyder, YuPo Lin, Meltem Urgun-Demirtas
  • Patent number: 8652326
    Abstract: A device for the electrodeionization of an aqueous electrolyte solution, comprises an electrodeionization module (1), an ultrafiltration module (21, 22, 1201, 1202, 1203) and a connection piece (3, 10) which connects the electrodeionization module (1) and the ultrafiltration module (21, 22, 1201, 1202, 1203) such as to be able to guide a diluate produced from the electrolyte solution during operation of the device in the electrodeionization module (1) from the electrodeionization module (1) to the ultrafiltration module (21, 22, 1201, 1202, 1203); wherein the connection piece (3, 10) is devoid of an adjustable pressure-maintaining valve. Via the pressure drop occurring in the ultrafiltration modules (21, 22, 1201, 1202, 1203), these devices build up a counter pressure behind the electrodeionization module (1) which is sufficient to ensure the packing density of the ion exchanger in the electrodeionization module (1).
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: February 18, 2014
    Assignee: Christ Water Technology AG
    Inventors: Jurgen Johann, Thomas Menzel, Monique Bissen, Thomas Schramm, Christian Brand
  • Publication number: 20140014519
    Abstract: An ion-exchange membrane including a porous unstretched polyethylene sheet in which fine pores are piercing, the pores being filled with an ion-exchange resin. The ion-exchange membrane exhibits excellent concentration property.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 16, 2014
    Applicant: ASTOM CORPORATION
    Inventors: Nobuhiko Ohmura, Kazuo Mizuguchi, Kazunori Nishio, Toshio Aritomi
  • Patent number: 8628653
    Abstract: An electrodeionization apparatus has a cathode and an anode, and has alternately formed therebetween concentrating chambers and desalination chambers by alternately arranging a plurality of anion exchange membranes and cation exchange membranes, each of the concentrating chambers being provided with a bipolar membrane to partition the interior of the concentrating chamber into a cathode side and an anode side, and each of the desalination chambers being divided into at least two layers including a first layer and a second layer, from an upstream side in a direction of flow of water to be treated, and being filled with an ion exchanger comprising an anion exchanger and a cation exchanger. The ion exchanger filling the first layer contains no less than 50 vol % of the cation exchanger, while the ion exchanger filling the second layer contains over 50 vol % to 80 vol % of the anion exchanger.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: January 14, 2014
    Assignee: Kurita Water Industries Ltd.
    Inventors: Hirokazu Kaku, Masanobu Osawa
  • Publication number: 20130306482
    Abstract: The present invention relates to an ionic species removal system comprising one or more electrode stack(s), each electrode stack including two electrodes and cation exchange membranes and anion exchange membranes alternately arranged between the two electrodes, wherein at least one electrode of at least one of the electrode stack(s) is an electrode coated with an ion exchange coating. The ionic species removal system mitigates the scaling risk by employing an electrode coated with an ion exchange coating.
    Type: Application
    Filed: January 3, 2012
    Publication date: November 21, 2013
    Inventors: Hai Yang, John Harold Barber, Rihua Xiong, Wei Cai, Chang Wei
  • Patent number: 8580096
    Abstract: A method for producing succinic acid is provided, which comprises circulating a fermentation broth containing succinate ion through an electrodeionization apparatus. The apparatus comprises an anode; a cathode; a stacked ion-exchange assembly comprising a one or more oriented ion-exchange units between the anode and the cathode. Each ion-exchange unit comprises a porous ion-exchange resin wafer including an inlet and an outlet together are adapted to circulate a liquid reaction stream containing a carboxylate anion from a fermentor through the resin wafer; a flow-distributing gasket for circulating a product stream through a product reservoir; an anion exchange membrane for transporting at least a portion of the carboxylate anion to the product stream; and a bipolar ion-exchange membrane to direct protons toward the cathode and into the product stream and to direct hydroxyl ions toward the anode and into the reaction stream in the resin wafer of an adjacent ion-exchange unit.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: November 12, 2013
    Assignee: Uchicago Argonne, LLC
    Inventors: Edward J. St. Martin, YuPo J. Lin