公开(公告)号：US20230406718A1

公开(公告)日：2023-12-21

申请号：US18251338

申请日：2021-11-05

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Daisuke MORI ,  Masashi MACHIDA ,  Futoshi UTSUNO ,  Tsuyoshi HOSHINO

IPC: C01D15/02 ,  H01M10/54 ,  C22B26/12 ,  C22B3/22 ,  B01D9/00

CPC classification number: C01D15/02 ,  H01M10/54 ,  C22B26/12 ,  C22B3/22 ,  B01D9/0004 ,  B01D9/0022 ,  C01P2006/40

Abstract: Provided is a lithium hydroxide production method for producing high-purity lithium hydroxide efficiently and at a lower energy, wherein Li ions alone are recovered in a recovery liquid from a lithium ion extract extracted from a processed member of a lithium secondary battery, using a Li permselective membrane, and lithium hydroxide is produced from the recovery liquid.

公开(公告)号：US20240182316A1

公开(公告)日：2024-06-06

申请号：US18553099

申请日：2022-04-01

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Hideki YAMAMOTO ,  Futoshi UTSUNO ,  Daisuke MORI ,  Hiroyuki HIGUCHI

IPC: C01D15/02 ,  B01D9/00 ,  B01D61/44 ,  B01J19/24 ,  C01D15/08 ,  C25B3/07 ,  C25B15/08

CPC classification number: C01D15/02 ,  B01D9/0018 ,  B01D61/44 ,  B01J19/245 ,  C01D15/08 ,  C25B3/07 ,  C25B15/08 ,  B01D2009/0086

Abstract: A method for producing a lithium compound, by which a high purity lithium compound can be produced from low-grade lithium carbonate containing impurities, such as salt water. The method includes: mixing lithium carbonate, an acid containing an organic acid, and water in a reaction tank 1 to produce an aqueous organic acid lithium solution containing an organic acid lithium; mixing the organic acid lithium and a metal hydroxide in a reaction tank 2 to produce an aqueous lithium hydroxide solution; and returning an organic acid, which is regenerated by using an electrochemical device from an organic acid metal by-produced by producing the aqueous lithium hydroxide solution to the reaction tank 1 and using the regenerated organic acid as the organic acid. An apparatus for producing a lithium compound, including the reaction tank 1, the reaction tank 2, the electrochemical device, and a return pipe, which each have a specific function.

公开(公告)号：US20240051838A1

公开(公告)日：2024-02-15

申请号：US18551635

申请日：2022-03-25

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Shota HOSHI ,  Daisuke MORI ,  Futoshi UTSUNO ,  Atsushi SATO ,  Satoshi KATSUMATA

IPC: C01D15/02 ,  B01D61/46 ,  B01D15/20 ,  C22B26/12 ,  C22B3/24 ,  C01D1/40 ,  C01D1/42 ,  B01J20/06

CPC classification number: C01D15/02 ,  B01D61/46 ,  B01D15/203 ,  C22B26/12 ,  C22B3/24 ,  C01D1/40 ,  C01D1/42 ,  B01J20/06

Abstract: A method of producing lithium hydroxide using a variety of aqueous solutions as a source liquid. The method includes: providing a lithium ion extraction liquid, including a first mixing of an aqueous solution containing lithium and at least one kind of an element other than lithium and a base in a reaction tank, with a pH regulated to 6 or more and 10 or less, a second mixing of the aqueous solution and the base, with a pH regulated to 12 or more, and removal of a hydroxide of the element other than lithium formed through the first and second mixing; recovering only lithium ion from the lithium ion extraction liquid to a recovery liquid with an electrochemical device including a Li-selectively permeable membrane; and performing the regulation of pH by returning the lithium ion extraction liquid after recovering lithium ion with the electrochemical device to the reaction tank.