公开(公告)号：US20210069645A1

公开(公告)日：2021-03-11

申请号：US16978985

申请日：2019-03-12

Applicant: BL TECHNOLOGIES, INC.

Inventor： Chengqian ZHANG ,  Wei LU ,  Jiyang XIA ,  Yongchang ZHENG ,  Bruce BATCHELDER ,  John H. BARBER

IPC: B01D61/44 ,  B01D61/46 ,  B01D69/02 ,  C02F1/469

Abstract: A bipolar electrodialysis (BPED) cell is able to bipolar convert salt solutions into acid and base solutions. However, protons migrate through the anion exchange membranes and tend to neutralize the base solution. In a bipolar electrodialysis system described herein, multiple BPED cells are arranged to provide a multi-stage treatment system. Up to half, or up to one third, of the stages have cells with acid block anion membranes. The one or more stages with acid block anion membranes are located at the acid product output end of the system, where the acid concentration in the system is the highest. Replacing the traditional anion membranes in some of the stages with acid block anion membranes allows higher concentration products to be produced with moderate increase in energy consumption.

公开(公告)号：US20200048421A1

公开(公告)日：2020-02-13

申请号：US16344882

申请日：2016-11-01

Applicant: BL Technologies, Inc.

Inventor： Kai ZHANG ,  Li May GOH ,  Seng Yong GOH ,  John H. BARBER ,  Russell James MACDONALD ,  Yongchang ZHENG ,  Yonghong ZHAO

IPC: C08J5/22 ,  B01J39/20 ,  B01D61/46 ,  B01D69/02 ,  B01D71/40

Abstract: The present disclosure provides a method of producing a cation exchange polymer, the method includes polymerizing an anionic monomer in the presence of a polymerizable crosslinker having a cationic functional group. A sufficient amount of anionic monomer is used to provide both the anionic charges necessary for cation exchange, and the anionic charges necessary to pair with the cationic functional groups in the crosslinker.

公开(公告)号：US20230017973A1

公开(公告)日：2023-01-19

申请号：US17955445

申请日：2022-09-28

Applicant: BL Technologies, Inc.

Inventor： John H. BARBER ,  Wojciech GUTOWSKI ,  Yongchang ZHENG ,  Russell James MACDONALD

IPC: B01D61/50 ,  B01D63/08

Abstract: The present disclosure provides an electrodialysis stack that may be used for the treatment of an electrically conductive solution. The stack includes two electrodes (at least one is a recessed electrode), a plurality of ion-transport membranes and stack spacers. The membranes and spacers are arranged between the electrodes to define electrodialysis cell pairs. The stack includes an electrically insulated zone that extends substantially from a distribution manifold past the recessed edge of the electrode and substantially from the recessed electrode to the opposite electrode for a distance that is about 8% to 100% of the total distance between the electrodes. The overlap distance that the electrically insulated zone extends past the recessed edge of the electrode is calculated as: distance in cm=(0.062 cm−1)*(exp(−60/total cp)*(area in cm2 of the manifold ducts of the concentrated stream at the recessed edge)+/−10%.

公开(公告)号：US20240139684A1

公开(公告)日：2024-05-02

申请号：US18408133

申请日：2024-01-09

Applicant: BL TECHNOLOGIES, INC.

Inventor： John H. BARBER ,  Wojciech GUTOWSKI ,  Yongchang ZHENG ,  Russell James MACDONALD

IPC: B01D61/50 ,  B01D63/08

CPC classification number: B01D61/50 ,  B01D63/085 ,  B01D2313/14 ,  B01D2325/42

Abstract: The present disclosure provides an electrodialysis stack that may be used for the treatment of an electrically conductive solution. The stack includes two electrodes (at least one is a recessed electrode), a plurality of ion-transport membranes and stack spacers. The membranes and spacers are arranged between the electrodes to define electrodialysis cell pairs. The stack includes an electrically insulated zone that extends substantially from a distribution manifold past the recessed edge of the electrode and substantially from the recessed electrode to the opposite electrode for a distance that is about 8% to 100% of the total distance between the electrodes. The overlap distance that the electrically insulated zone extends past the recessed edge of the electrode is calculated as:


distance in cm=(0.062 cm−1)*(exp(−60/total cp)*(area in cm2 of the manifold ducts of the concentrated stream at the recessed edge)+/−10%.

公开(公告)号：US20200070095A1

公开(公告)日：2020-03-05

申请号：US16609406

申请日：2017-05-04

Applicant: BL Technologies, Inc.

Inventor： John H. BARBER ,  Wojciech GUTOWSKI ,  Yongchang ZHENG ,  Russell James MACDONALD

IPC: B01D61/50 ,  B01D63/08

Abstract: The present disclosure provides an electrodialysis stack that may be used for the treatment of an electrically conductive solution. The stack includes two electrodes (at least one is a recessed electrode), a plurality of ion-transport membranes and stack spacers. The membranes and spacers are arranged between the electrodes to define electrodialysis cell pairs. The stack includes an electrically insulated zone that extends substantially from a distribution manifold past the recessed edge of the electrode and substantially from the recessed electrode to the opposite electrode for a distance that is about 8% to 100% of the total distance between the electrodes. The overlap distance that the electrically insulated zone extends past the recessed edge of the electrode is calculated as: distance in cm=(0.062 cm−1)*(exp(−60/total cp)*(area in cm2 of the manifold ducts of the concentrated stream at the recessed edge) +/−10%.