Method for producing lithium carbonate
US9255011B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Nov 5, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D15/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.