公开(公告)号：US11555251B2

公开(公告)日：2023-01-17

申请号：US17416413

申请日：2019-12-19

Applicant: Mangrove Water Technologies LTD.

Inventor： Saad Dara ,  Benjamin Zahiri

IPC: C01D7/00 ,  C25B1/14 ,  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 ,  C02F101/10 ,  C02F103/08 ,  C02F103/10

Abstract: 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.

公开(公告)号：US11466375B1

公开(公告)日：2022-10-11

申请号：US17002834

申请日：2020-08-26

Applicant: Consolidated Nuclear Security, LLC

Inventor： John W. Freiderich

IPC: C25C1/00 ,  C25C1/02 ,  C25C7/04

Abstract: A method and electrolysis cell for producing lithium metal at a low temperature. The method includes combining (i) phenyl trihaloalkyl sulfone and (ii) an inorganic cation bis(perhaloalkylsulfonyl)imide, an inorganic cation bis(halosulfonyl)imide, an inorganic cation bis(perhaloalkylsulfonyl)imidic acid, or an inorganic cation bis(halosulfonyl)imidic acid in a weight ratio of (i) to (ii) about 10:90 to about 60:40 to provide a non-aqueous electrolyte composition. A lithium compound selected from the group consisting of LiOH, Li2O and Li2CO3 is dissolved in the electrolyte composition to provide a soluble lithium doped electrolyte composition. Power is applied to the electrolyte composition to form lithium metal on a cathode of an electrolysis cell. The lithium metal is separated from the cathode has a purity of at least about 95 wt. %.

公开(公告)号：US20220267918A1

公开(公告)日：2022-08-25

申请号：US17629716

申请日：2020-07-24

Applicant: LI-METAL CORP.

Inventor： Maciej Urban Jastrzebski ,  Timothy George Johnston

IPC: C25C7/00 ,  C25C3/02 ,  C25C7/04

Abstract: A molten salt, membrane electrolyzer apparatus may include an anolyte compartment containing a molten salt anolyte comprising primarily chloride salts and a lithium carbonate (Li2CO3) feed material. A first and second electrode assemblies each having respective anodes, cathode housings proximate the first anode within the anolyte compartment and in fluid contact with the molten salt anolyte and having a primary transfer portion comprising a porous membrane and cathodes positioned within the first catholyte compartment so that the primary transfer portion is disposed between respective anode and cathode. A power supply can be configured to apply an electric potential between the first anode and the first cathode that is sufficient to initiate electrolysis of lithium carbonate and is greater than the electric potential required to initiate LiCl electrolysis.

公开(公告)号：US11384443B2

公开(公告)日：2022-07-12

申请号：US16652991

申请日：2018-09-03

Applicant: INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES

Inventor： Hui Zhang ,  Tao Qi

IPC: C25C1/20 ,  C25C7/02 ,  C25C7/04

Abstract: A method for producing metallic silver by electro-deposition, including electrolyzing an electrolyte solution containing Ce(NO3)3 in an anode zone and an electrolyte solution containing AgNO3 in a cathode zone by using an electrolytic cell with a specific diaphragm, wherein the electrolyte solution in the anode zone is not allowed to enter the cathode zone. After the electrolyzing is complete, the metallic silver with a high purity is obtained at the cathode, and a Ce4+-containing solution is obtained in the anode zone.

公开(公告)号：US20200149171A1

公开(公告)日：2020-05-14

申请号：US16741588

申请日：2020-01-13

Applicant: Enlighten Innovations Inc.

Inventor： John Howard GORDON

IPC: C25B9/18 ,  C25B1/00 ,  C25B13/08 ,  C25C7/08 ,  C25C7/04 ,  C25C7/02 ,  C25C1/02 ,  C25C7/00

Abstract: A system to remove sodium and Sulfur from a feed stream containing alkali metal sulfides and polysulfides in addition to heavy metals. The system includes an electrolytic cell having an anolyte compartment housing an anode in contact with an anolyte. The anolyte includes alkali metal sulfides and polysulfides dissolved in a polar organic solvent. The anolyte includes heavy metal ions. A separator includes an ion conducting membrane and separates the anolyte compartment from a catholyte compartment that includes a cathode in contact with a catholyte. The catholyte includes an alkali ion-conductive liquid. A power source applies a voltage to the electrolytic cell high enough to reduce the alkali metal and oxidize Sulfur ions to allow recovery of the alkali metal and elemental sulfur. The ratio of sodium to Sulfur is such that the open circuit potential of the electrolytic cell is greater than about 2.3V.

公开(公告)号：US10597305B2

公开(公告)日：2020-03-24

申请号：US15755507

申请日：2016-08-26

Applicant: NEMASKA LITHIUM INC.

Inventor： Jean-François Magnan ,  Guy Bourassa ,  Nicolas Laroche ,  Gary Pearse ,  Stephen Charles Mackie ,  Mykolas Gladkovas ,  Peter Symons ,  J. David Genders ,  Geneviève Clayton ,  Pierre Bouchard ,  Bertin Ouellet

IPC: C25C7/04 ,  C25C7/00 ,  C01D15/06 ,  C01D15/02 ,  C22B1/02 ,  C22B3/08 ,  C25B1/16 ,  C22B3/22 ,  C22B7/00 ,  C22B26/12 ,  B01D61/02 ,  B01D61/44 ,  B01D61/58 ,  C25B9/08 ,  B01D61/46 ,  C25B15/08

Abstract: The disclosure relates to methods for preparing lithium hydroxide. For example, such methods can comprise mixing a lithium-containing material with an acidic aqueous composition optionally comprising lithium sulfate and thereby obtaining a mixture; roasting the mixture under suitable conditions to obtain a roasted, lithium-containing material; leaching the roasted material under conditions suitable to obtain a first aqueous composition comprising lithium sulfate; submitting the first aqueous composition comprising lithium sulfate to an electromembrane process under suitable conditions for at least partial conversion of the lithium sulfate into lithium hydroxide and to obtain a second aqueous composition comprising lithium sulfate, the electromembrane process involving a hydrogen depolarized anode; optionally increasing concentration of acid in the second aqueous composition; and using the second aqueous composition comprising lithium sulfate as the acidic aqueous composition optionally comprising lithium sulfate for mixing with the lithium-containing material and to obtain the mixture.

公开(公告)号：US20200087806A1

公开(公告)日：2020-03-19

申请号：US16134528

申请日：2018-09-18

Applicant: UCHICAGO ARGONNE, LLC

Inventor： John N. Hryn ,  Patricia Anne Ignacio-deLeon ,  Li Tang ,  Daniel Yoav Arenas

IPC: C25C1/02 ,  C25C7/02 ,  C25C7/04 ,  H01M4/1395 ,  H01M4/04

Abstract: System and methods for producing lithium metal from an anodic half-cell and a cathodic half-cell with a lithium permeable membrane therebetween.

公开(公告)号：US10355305B2

公开(公告)日：2019-07-16

申请号：US14196893

申请日：2014-03-04

Applicant: FIELD UPGRADING LIMITED

Inventor： Sai Bhavaraju

IPC: H01M10/052 ,  H01M10/054 ,  C25B13/04 ,  C25C7/04 ,  H01M10/0562 ,  H01M6/18 ,  H01M8/1016

Abstract: The present invention provides an electrochemical cell that includes an anolyte compartment housing an anode electrode; a catholyte compartment housing a cathode electrode; and a solid alkali ion conductive electrolyte membrane separating the anolyte compartment from the cathode compartment. In some cases, the electrolyte membrane is selected from a sodium ion conductive electrolyte membrane and a lithium ion conductive membrane. In some cases, the at least one of anode or the cathode includes an alkali metal intercalation material.

公开(公告)号：US20180363153A9

公开(公告)日：2018-12-20

申请号：US15393717

申请日：2016-12-29

Applicant: FIELD UPGRADING LIMITED

Inventor： John Howard Gordon

IPC: C25B9/18 ,  C25C7/00 ,  C25C1/02 ,  C25C7/02 ,  C25C7/04 ,  C25C7/08 ,  C25B13/08 ,  C25B1/00

Abstract: A system to remove sodium and Sulfur from a feed stream containing alkali metal sulfides and polysulfides in addition to heavy metals. The system includes an electrolytic cell having an anolyte compartment housing an anode in contact with an anolyte. The anolyte includes alkali metal sulfides and polysulfides dissolved in a polar organic solvent. The anolyte includes heavy metal ions. A separator includes an ion conducting membrane and separates the anolyte compartment from a catholyte compartment that includes a cathode in contact with a catholyte. The catholyte includes an alkali ion-conductive liquid. A power source applies a voltage to the electrolytic cell high enough to reduce the alkali metal and oxidize Sulfur ions to allow recovery of the alkali metal and elemental sulfur. The ratio of sodium to Sulfur is such that the open circuit potential of the electrolytic cell is greater than about 2.3V.

公开(公告)号：US20180355494A1

公开(公告)日：2018-12-13

申请号：US15573393

申请日：2016-05-13

Applicant: Aqua Metals Inc.

Inventor： Stephen R. Clarke ,  Robert Lewis Clarke ,  Brian Dougherty

IPC: C25C1/18 ,  C25C7/00 ,  C25C7/02 ,  C25C7/04 ,  H01M10/54

Abstract: A closed loop electrochemical process of recovery of high-purity lead uses continuous formation of adherent lead on a cathode from an electrolyte that is used to dissolve desulfated lead paste. Preferred cathodes include aluminum containing cathodes that are operated in methane sulfonic acid to produce a micro- or nanoporous mixed matrix metallic composition and lead dioxide formation at the anode is avoided using appropriate anode configurations or operating conditions