The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2024
Filed:
Aug. 29, 2019
Jx Metals Corporation, Tokyo, JP;
JX METALS CORPORATION, Tokyo, JP;
Abstract
Provided is a method for producing lithium carbonate from lithium ion battery waste, the lithium ion battery waste including battery positive material components containing Li and at least one metal selected from the group consisting of Co, Ni and Mn, wherein, after subjecting the lithium ion battery waste to a wet process, thereby separating the at least one metal of the battery positive material components from the lithium ion battery waste to obtain crude lithium carbonate, the method includes: a dissolution step of dissolving the crude lithium carbonate in a liquid while feeding a carbon dioxide gas; and a decarbonization step of heating a lithium dissolved solution obtained in the dissolution step to release carbonic acid, and wherein when dissolving the crude lithium carbonate in the liquid in the dissolution step, the liquid is stirred in a reaction vessel using a stirrer, and a ratio of a diameter (d) of a stirring blade of the stirrer to an inner diameter (D) of the reaction vessel (d/D) is from 0.2 to 0.5.