Chemetall Foote Corporation

Tronox LLC

Anthony Michael Thurston

Daniel Alfred Boryta

Teresita Frianeza Kullberg

Wilmont Frederick Howard, Jr

Stephen Wilfred Sheargold

Felix Mbanga Towa

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.

Production of lithium compounds directly from lithium containing brines

Intercalation cathode materials especially suited for use in high-voltage, high-energy lithium rechargeable batteries, having the formulae Li[Li()/MMn()/Ni()O, where 0&#x3c;x&#x3c;0.5, 0&#x3c;y&#x2266;0.25, x&#x3e;y, and M is one or more divalent cations from Ca, Cu, Mg, and Zn. A process for making such materials is also provided.

High voltage laminar cathode materials for lithium rechargeable batteries, and process for making the same

Metal carbonates that are insoluble in water but that have a corresponding metal biocarbonate salt that is more than 75% by weight soluble in water are purified by preparing an aqueous slurry of the metal carbonate: introducing carbon dioxide gas to form a corresponding metal biocarbonate solution and heating that solution to form a purified metal carbonate and precipitate it.

A continuous process for directly preparing high purity lithium carbonate from lithium containing brines by preparing a brine containing about 6.0 wt % lithium and further containing other ions naturally occurring in brines; adding mother liquor containing carbonate to precipitate magnesium; adding a solution of CaO and sodium carbonate to remove calcium and any residual magnesium; precipitating lithium carbonate from the purified brine by adding soda ash solution; filtering to obtain solid lithium carbonate; preparing an aqueous slurry of the lithium carbonate and introducing carbon dioxide gas at a temperature from at least minus 10 to +40&#xb0; C.; passing the lithium bicarbonate solution through a filter to clarify the solution; introducing said filtered lithium bicarbonate solution into a reactor and adjusting the temperature of the solution to from 60&#x2013;100&#xb0; C. to precipitate ultra-pure lithium carbonate.

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Edmond, OK, United States of America

Anthony Michael Thurston