Jx Nippon Mining Metals Corporation

Jx Metals Corporation

Jx Metals Circular Solutions Co., Ltd.

Hiroshi Abe

Junichi Ito

Isao Tomita

Hirotaka Ariyoshi

Junichi Arakawa

A method for dissolving a lithium compound according to the present invention includes bringing a lithium compound into contact with water or an acidic solution, and feeding, separately from the lithium compound, a carbonate ion to the water or the acidic solution to produce carbonic acid, and allowing the carbonic acid to react with the lithium compound to produce lithium hydrogen carbonate.

Method for dissolving lithium compound, method for manufacturing lithium carbonate, and method for recovering lithium from lithium ion secondary cell scrap

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.

Method for producing lithium carbonate

Growing community of inventors

Hitachi, Japan

Hiroshi Abe