Back to results
US 6,207,126 B1Granted
Recovery of lithium compounds from brines
AssigneeChemetall Foote Corporation
InventorsDaniel Alfred Boryta, Teresita Frianeza Kullberg, Anthony Michael Thurston
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for the production of low sodium lithium carbonate and lithium chloride from a brine concentrated to about 6.0 wt % lithium are disclosed. Methods and apparatus for direct recovery of technical grade lithium chloride from the concentrated brine are also disclosed.
Claims1
A process for the direct recovery of lithium chloride from brine comprising:
- preparing a brine containing about 6.0 wt % lithium, and further containing magnesium, calcium and sulfate;
- adding CaO or Ca(OH)2 to the brine to coprecipitate magnesium and calcium;
- adding oxalate to remove remaining calcium by precipitating calcium oxalate;
- adding barium to remove sulfate by precipitating barium sulfate;
- adjusting the final pH of the brine to about 7.0 to precipitate lithium chloride.
2 more elements
Dependencies are inferred from the claim text.