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Abstract

A method for extracting lithium from lithium-containing material including reducing the material to base particle size; mixing the base particles with an aqueous solution of a first base; heating the slurry to a temperature in a range of 60° to 75° C. for 0.5 to four hours; adding hydrochloric acid to the heated slurry until it reaches a pH level of −1.0 to 0.00; maintaining the acid-treated slurry at 60° to 75° C. for 0.5 to four hours; cooling the acid-treated slurry to near-ambient temperature and treating it with a second base until the acid-treated slurry reaches a pH of 7.5; precipitating deleterious base metals from the direct lithium extracted solution and combining the deleterious base metals with the leached clay solids; and passing the direct lithium extracted solution and solid tailings materials through a filter.

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First Claim