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US 12,252,409 B2Granted
Preparation of lithium carbonate from lithium chloride containing brines
AssigneeTerralithium LLC
InventorStephen Harrison
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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.
Claims10
A process for recovery of lithium from a geothermal brine, the process comprising the steps of:
- removing impurities comprising silica and iron from a geothermal brine comprising:
- oxidizing the geothermal brine;
- and
- raising the pH of the geothermal brine to a pH greater than 5 to co-precipitate silica and iron from the geothermal brine;
- recovering lithium chloride from the geothermal brine to produce a lithium chloride-rich stream;
- and
- concentrating the lithium chloride in the lithium chloride-rich stream.
4 more elements
Dependencies are inferred from the claim text.