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    Monovalent Selective Cation Exchange Membrane
    2.
    发明申请
    Monovalent Selective Cation Exchange Membrane 有权

    公开(公告)号：US20220062829A1

    公开(公告)日：2022-03-03

    申请号：US17281239

    申请日：2019-09-25

    Applicant: EVOQUA WATER TECHNOLOGIES LLC

    Inventor： George Gu ,  SAVVAS HADJIKYRIACOU ,  Simon P. DUKES ,  Michael J. SHAW

    IPC: B01D69/02 ,  B01D61/44 ,  B01D69/10 ,  B01D69/12 ,  C02F1/469

    Abstract: A monovalent selective ion exchange membrane is disclosed. The membrane includes a polymeric microporous substrate, a cross-linked ion-transferring polymeric layer on a surface of the substrate, and a charged functionalizing layer covalently bound to the ion-transferring layer by an acrylic group. A method of producing a monovalent selective cation exchange membrane is also disclosed. The method may include chemically adsorbing an acrylic intermediate layer comprising a chlorosulfonated methacrylate group to a cross-linked ion-transferring polymeric layer on a surface of a polymeric microporous substrate, aminating the chlorosulfonated methacrylate group to attach an amine group layer, and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane. Water treatment systems including the monovalent selective cation exchange membrane and methods of facilitating water treatment including providing the monovalent selective cation exchange membrane are also disclosed.

    Implementation of feedback control for improved electrochemical system design
    3.
    发明申请
    Implementation of feedback control for improved electrochemical system design 有权

    公开(公告)号：US20210395911A1

    公开(公告)日：2021-12-23

    申请号：US16491781

    申请日：2018-03-06

    Applicant: Evoqua Water Technologies LLC

    Inventor： Simon Paul Dukes ,  George Gu ,  Joshua Griffis ,  Michael Shaw

    IPC: C25B15/029 ,  C25B1/04

    Abstract: A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and reversing polarity of the anode and the cathode responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to reverse polarity responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed.

    Ion exchange membrane through UV initiation polymetrization
    4.
    发明申请
    Ion exchange membrane through UV initiation polymetrization 有权

    公开(公告)号：US20210340343A1

    公开(公告)日：2021-11-04

    申请号：US17280179

    申请日：2019-09-25

    Applicant: Evoqua Water Technologies LLC

    Inventor： George Gu ,  Simon P. Dukes ,  Savvas Hadjikyriacou ,  Michael Shaw

    IPC: C08J5/22 ,  B01D69/12 ,  B01D69/10 ,  B01D69/02

    Abstract: Methods of producing an ion exchange membrane support are disclosed. The methods include saturating a polymeric microporous substrate with a charged monomer solution comprising at least one functional monomer, a cross-linking agent, and an effective amount of at least one photopolymerization initiator and polymerizing the at least one functional monomer by exposing the saturated polymeric microporous substrate to ultraviolet light under conditions effective to cross-link the at least one functional monomer and produce the ion exchange membrane support. Methods of producing a monovalent selective ion exchange membrane are also disclosed. The methods include functionalizing an exterior surface of the ion exchange membrane support with a charged compound layer, drying the ion exchange membrane support and soaking the ion exchange membrane support in a solution comprising an acid or a base for an amount of time effective to produce the monovalent selective ion exchange membrane.

    Ion exchange membrane through UV initiation polymerization
    7.
    发明授权
    Ion exchange membrane through UV initiation polymerization 有权

    公开(公告)号：US12163001B2

    公开(公告)日：2024-12-10

    申请号：US17280179

    申请日：2019-09-25

    Applicant: Evoqua Water Technologies LLC

    Inventor： George Gu ,  Simon P. Dukes ,  Savvas Hadjikyriacou ,  Michael Shaw

    IPC: C08J5/22 ,  B01D61/42 ,  B01D67/00 ,  B01D69/02 ,  B01D69/10 ,  B01D69/12 ,  B01D71/26 ,  B01D71/60 ,  C02F1/469 ,  B01D61/44 ,  C08K5/132 ,  C08K5/315 ,  C08K5/5397

    Abstract: Methods of producing an ion exchange membrane support are disclosed. The methods include saturating a polymeric microporous substrate with a charged monomer solution comprising at least one functional monomer, a cross-linking agent, and an effective amount of at least one photopolymerization initiator and polymerizing the at least one functional monomer by exposing the saturated polymeric microporous substrate to ultraviolet light under conditions effective to cross-link the at least one functional monomer and produce the ion exchange membrane support. Methods of producing a monovalent selective ion exchange membrane are also disclosed. The methods include functionalizing an exterior surface of the ion exchange membrane support with a charged compound layer, drying the ion exchange membrane support and soaking the ion exchange membrane support in a solution comprising an acid or a base for an amount of time effective to produce the monovalent selective ion exchange membrane.

    Half-cell electrochemical configurations for self-cleaning electrochlorination devices
    8.
    发明公开
    Half-cell electrochemical configurations for self-cleaning electrochlorination devices 审中-公开

    公开(公告)号：US20240034648A1

    公开(公告)日：2024-02-01

    申请号：US18377823

    申请日：2023-10-08

    Applicant: Evoqua Water Technologies LLC

    Inventor： Joshua Griffis ,  George Gu ,  Simon P. Dukes ,  Michael J. Shaw

    IPC: C02F1/467 ,  C02F1/461

    CPC classification number: C02F1/4674 ,  C02F1/46104 ,  C25B9/23

    Abstract: An electrochemical cell including a first chamber having an anode, a second chamber having a cathode, at least one ionic connection between the first chamber and the second chamber, such that liquid electrolyte from the first chamber is prevented from mixing with liquid electrolyte in the second chamber is provided. The first chamber and the second chamber can be arranged in parallel and positioned remotely from each other. An electrochemical system including the electrochemical cell, and first and second sources of saline aqueous solutions is also provided. Water treatment systems are also provided. A method of operating an electrochemical cell including introducing first and second saline aqueous solutions into first and second chambers of the electrochemical cell, and applying a current across the anode and the cathode to generate first and second products, respectively is also provided. A method of facilitating operation of an electrochemical cell is also provided.

    Pulsed power supply for sustainable redox agent supply for hydrogen abatement during electrochemical hypochlorite generation
    10.
    发明申请
    Pulsed power supply for sustainable redox agent supply for hydrogen abatement during electrochemical hypochlorite generation 有权

    公开(公告)号：US20210139351A1

    公开(公告)日：2021-05-13

    申请号：US16491753

    申请日：2018-03-06

    Applicant: Evoqua Water Technologies LLC

    Inventor： George Gu ,  Simon Paul Dukes ,  Joshua Griffis ,  Michael Shaw

    IPC: C02F1/467 ,  C02F1/461 ,  C25B1/30 ,  C25B9/17 ,  C25B15/031 ,  C25B15/029

    Abstract: A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and applying the current in a pulsed waveform responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to apply the current in a pulsed waveform responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed.

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