Back to results
US 11,718,895 B2Granted
Method for dissolving lithium compound, method for manufacturing lithium carbonate, and method for recovering lithium from lithium ion secondary cell scrap
AssigneeJX Nippon Mining & Metals Corporation
InventorsHirotaka Ariyoshi, Isao Tomita, Hiroshi Abe
Life of this patent
Estimating the term…
Abstract
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.
Claims7
A method for recovering lithium from lithium ion secondary cell scrap, the method comprising:
- a calcination step of calcining the lithium ion secondary cell scrap;
- and a lithium dissolving step of bringing cell powder obtained after the calcination step into contact with water or an acidic solution and feeding, separately from the cell powder, a carbonate ion to the water or the acidic solution to dissolve lithium in the cell powder,
- wherein the cell powder contains cobalt and aluminum,
- wherein a pH of a lithium dissolved solution obtained in the lithium dissolving step is from 7 to 10, and
- wherein the cell powder comprises at least one selected from the group consisting of lithium hydroxide, lithium oxide and lithium carbonate.
2 more elements
Dependencies are inferred from the claim text.