公开(公告)号：US20230304166A1

公开(公告)日：2023-09-28

申请号：US18041189

申请日：2021-08-11

申请人： The Regents of the University of California

发明人： Iryna Zenyuk ,  Andrea Perego ,  Mo Li ,  Devashish S. Kulkarni

IPC分类号： C25B1/16 ,  C25B9/21 ,  C25B13/08 ,  C25B11/077 ,  C25B11/065 ,  C25B11/081 ,  C25B11/032 ,  C25B15/08 ,  C04B7/48 ,  C25B13/02

CPC分类号： C25B1/16 ,  C25B9/21 ,  C25B13/08 ,  C25B11/077 ,  C25B11/065 ,  C25B11/081 ,  C25B11/032 ,  C25B15/083 ,  C04B7/48 ,  C25B13/02 ,  C25B1/04

摘要： An electrochemical method for producing calcium hydroxide includes dissolving a calcium precursor in a first solution in contact with a first electrode to produce Ca2+ ions, transporting the Ca2+ ions across a first membrane from the first solution into a second solution using a first electrochemical potential, producing hydroxide ions at a second electrode, transporting the hydroxide ions across a second membrane into the second solution using a second electrochemical potential, and precipitating calcium hydroxide from the second solution.

公开(公告)号：US11702755B2

公开(公告)日：2023-07-18

申请号：US17883969

申请日：2022-08-09

申请人： Mangrove Water Technologies LTD.

发明人： Saad Dara ,  Beniamin Zahiri

IPC分类号： C25B11/031 ,  C25B9/23 ,  C25B11/032 ,  C25B11/052 ,  C25B9/21 ,  B01D61/46 ,  B01D69/02 ,  C01D15/02 ,  C01D15/04 ,  C01D15/08 ,  C01F5/24 ,  C01F11/18 ,  C02F1/461 ,  C02F1/469 ,  C25B1/16 ,  C25C1/02 ,  C25C7/02 ,  C25C7/04 ,  C25B11/048 ,  C25B11/046 ,  C25B9/19 ,  C25B11/053 ,  C25B13/00 ,  C02F101/10 ,  C02F103/08 ,  C02F103/10

CPC分类号： C25B9/23 ,  B01D61/46 ,  B01D69/02 ,  C01D15/02 ,  C01D15/04 ,  C01D15/08 ,  C01F5/24 ,  C01F11/181 ,  C02F1/4693 ,  C02F1/46109 ,  C25B1/16 ,  C25B9/19 ,  C25B9/21 ,  C25B11/032 ,  C25B11/046 ,  C25B11/048 ,  C25B11/052 ,  C25B11/053 ,  C25B13/00 ,  C25C1/02 ,  C25C7/02 ,  C25C7/04 ,  B01D2313/345 ,  B01D2325/10 ,  B01D2325/36 ,  B01D2325/38 ,  B01D2325/42 ,  C02F2001/46142 ,  C02F2001/46166 ,  C02F2101/10 ,  C02F2103/08 ,  C02F2103/10

摘要： In this disclosure, a process of recycling acid, base and the salt reagents required in the Li recovery process is introduced. A membrane electrolysis cell which incorporates an oxygen depolarized cathode is implemented to generate the required chemicals onsite. The system can utilize a portion of the salar brine or other lithium-containing brine or solid waste to generate hydrochloric or sulfuric acid, sodium hydroxide and carbonate salts. Simultaneous generation of acid and base allows for taking advantage of both chemicals during the conventional Li recovery from brines and mineral rocks. The desalinated water can also be used for the washing steps on the recovery process or returned into the evaporation ponds. The method also can be used for the direct conversion of lithium salts to the high value LiOH product. The method does not produce any solid effluent which makes it easy-to-adopt for use in existing industrial Li recovery plants.