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Title:
METHOD FOR PRODUCING LITHIUM COMPOUND AND APPARATUS FOR PRODUCING LITHIUM COMPOUND
Document Type and Number:
WIPO Patent Application WO/2022/211128
Kind Code:
A1
Abstract:
Provided is a method for producing a lithium compound, by which a high purity lithium compound can be efficiently produced from low quality lithium carbonate containing impurities such as salt water, the method comprising: mixing lithium carbonate, an acid such as an organic acid and water in a reaction tank 1 to produce an aqueous organic acid lithium compound solution containing an organic acid lithium compound; mixing the organic acid lithium compound and a metal hydroxide in a reaction tank 2 to produce an aqueous lithium hydroxide solution; returning an organic acid, which is regenerated by means of an electrochemical device from an organic acid metal compound by-produced when the aqueous lithium hydroxide solution is produced, to the reaction tank 1, and using this as the organic acid. Also provided is an apparatus for producing a lithium compound, the apparatus having the reaction tank 1, the reaction tank 2, the electrochemical device and a return pipe, each of which have a specific function.

Inventors:
YAMAMOTO HIDEKI (JP)
UTSUNO FUTOSHI (JP)
MORI DAISUKE (JP)
HIGUCHI HIROYUKI (JP)
Application Number:
PCT/JP2022/017005
Publication Date:
October 06, 2022
Filing Date:
April 01, 2022
Export Citation:
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Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C01D15/02; B01D61/44; C01D15/08; C25B3/07; C25B9/00; C25B15/08
Foreign References:
JP2019131448A2019-08-08
US20190031527A12019-01-31
JP2018520872A2018-08-02
JPH07299333A1995-11-14
US20130272933A12013-10-17
JP2011518257A2011-06-23
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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