Back to results
US 11,649,170 B2Granted
Preparation of lithium carbonate from lithium chloride containing brines
AssigneeTerralithium LLC
InventorStephen Harrison
Life of this patent
Estimating the term…
Abstract
This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate.
Claims8
A process for recovery of lithium from a brine, the process comprising the steps of:
- providing a brine comprising lithium chloride, silica, and iron;
- contacting the brine with activated alumina to remove a portion of the silica from the brine;
- oxidizing the brine with an oxidant to convert a portion of the iron to iron (III) chloride;
- adjusting the pH of the brine to greater than 5 from an initial pH to precipitate ferric hydroxide;
- recovering lithium chloride from the brine to produce a lithium chloride-rich stream;
- concentrating the lithium chloride in the lithium chloride-rich stream using reverse osmosis;
- and
- converting the lithium chloride in the lithium chloride-rich stream to lithium carbonate, lithium hydroxide, or both.
5 more elements
Dependencies are inferred from the claim text.