公开(公告)号：US12017183B2

公开(公告)日：2024-06-25

申请号：US18209457

申请日：2023-06-13

Applicant: Evoqua Water Technologies LLC

Inventor： Michael J. Muse ,  Joshua Griffis ,  Li-Shiang Liang ,  Michael Shaw ,  Simon P. Dukes

IPC: B01D61/48 ,  B01D61/50 ,  B01D63/08 ,  B01D65/00 ,  C02F1/469

CPC classification number: B01D65/003 ,  B01D61/50 ,  B01D63/085 ,  C02F1/4693 ,  C02F1/4695 ,  B01D2313/04 ,  C02F2201/004

Abstract: An electrochemical separation device includes a first electrode, a second electrode, and a cell stack including a plurality of sub-blocks each having alternating depleting compartments and concentrating compartments and each including frame and channel portions disposed between the first electrode and the second electrode. An internal seal formed of a first material is disposed between and in contact with the channel portions between adjacent sub-blocks in the cell stack and configured to prevent leakage between depleting compartments and concentrating compartments in the adjacent sub-blocks. An external seal formed of a second material having at least one material parameter different from the first material is disposed between and in contact with the frames of the adjacent sub-blocks in the cell stack and configured to prevent leakage from an internal volume of the electrochemical separation device to outside of the electrochemical separation device.

公开(公告)号：US20220259085A1

公开(公告)日：2022-08-18

申请号：US17275286

申请日：2019-08-21

Applicant: Evoqua Water Technologies LLC

Inventor： Hao Dang ,  Wenxin Du ,  George Y. Gu ,  Michael J. Shaw ,  Simon P. Dukes

IPC: C02F9/00

Abstract: Methods for treating phosphogypsum-containing water are disclosed. The water may be treated so as to promote precipitation of one or more target constituents and to facilitate downstream membrane treatment. A coagulant may be added to promote phosphate recovery. Related systems are also disclosed.

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.

公开(公告)号：US12070722B2

公开(公告)日：2024-08-27

申请号：US18071613

申请日：2022-11-29

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  Li-Shiang Liang ,  William Lane ,  Simon P. Dukes ,  Kris Wy Loon Lim

IPC: B01D61/54 ,  B01D17/00 ,  B01D17/06 ,  B01D61/42 ,  B01D61/46 ,  B01D61/50

CPC classification number: B01D61/54 ,  B01D17/06 ,  B01D17/085 ,  B01D61/422 ,  B01D61/46 ,  B01D61/50

Abstract: An electrochemical separation device includes a first electrode, a second electrode, a cell stack including alternating depleting compartments and concentrating compartments disposed between the first electrode and the second electrode, an inlet manifold configured to introduce a fluid to one of the depleting compartments or the concentrating compartments an outlet manifold, and one or more of a fluid flow director disposed within the inlet manifold and having a surface configured to alter a flow path of the fluid introduced into the inlet manifold and direct the fluid into the one of the depleting compartments or the concentrating compartments, and a second fluid flow director disposed within the outlet manifold and having a surface configured to alter a flow path of the fluid introduced into the outlet manifold via one of the depleting compartments or the concentrating compartments.

公开(公告)号：US20210130966A1

公开(公告)日：2021-05-06

申请号：US16491728

申请日：2018-03-06

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  George Gu ,  Simon P. Dukes

IPC: C25B9/23 ,  C25B1/26 ,  C25B15/02 ,  C02F1/467

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.

公开(公告)号：US20180257961A1

公开(公告)日：2018-09-13

申请号：US15760400

申请日：2016-09-16

Applicant: Evoqua Water Technologies, LLC

Inventor： Joseph D. Gifford ,  Joshua Griffis ,  Simon P. Dukes ,  Li-Shiang Liang ,  Michael J. Shaw ,  Frederick C. Wilkins

IPC: C02F1/467 ,  C25B3/04 ,  C02F1/461 ,  C25B1/26 ,  C25B15/08 ,  C25B15/02

Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.

公开(公告)号：US20180119295A1

公开(公告)日：2018-05-03

申请号：US15561275

申请日：2016-02-17

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Joshua W. Griffis ,  Li-Shiang Liang ,  Paul Beddoes ,  Andrew Green ,  Simon P. Dukes ,  Jacob Telepciak

IPC: C25B1/26 ,  C25B9/08 ,  C25B11/03 ,  C25B11/04

Abstract: An electrochemical cell includes a cathode and an anode disposed in a housing. Each of the cathode and anode portions extending radially outward from a region proximate a central axis of the housing. A surface area of an active surface of the anode is greater than a surface area of an internal surface of the housing. A surface area of an active surface of the cathode is greater than a surface area of an internal surface of the housing.

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.

公开(公告)号：US20240043294A1

公开(公告)日：2024-02-08

申请号：US18484955

申请日：2023-10-11

Applicant: Evoqua Water Technologies LLC

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

IPC: C02F1/467 ,  C02F1/461

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

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.

公开(公告)号：US20230331595A1

公开(公告)日：2023-10-19

申请号：US17270852

申请日：2019-08-23

Applicant: Evoqua Water Technologies LLC

Inventor： Yang Chen ,  Simon P. Dukes

IPC: C02F1/467 ,  C02F1/00 ,  C02F1/461

CPC classification number: C02F1/4672 ,  C02F1/008 ,  C02F1/46109 ,  C02F2101/36

Abstract: Electrochemical treatment for the removal of poly- and perfluorolkyl substances from water is disclosed. An electrochemical cell may include a Magnéli phase titanium oxide electrode.