Production of lithium compounds directly from lithium containing brines

Assignee: Chemetall Foote Corporation

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Quick Facts

Patent No.: US 7,449,161
App. No.: 11/706,027
Granted: Nov 11, 2008
Kind: B2

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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.

Claims (1)

1. A process comprising: preparing high purity lithium chloride by reacting lithium carbonate having a sodium content of less 0.002 wt % with hydrochloric acid having less that 1 ppm sodium to produce high purity lithium chloride having a sodium content of less that 0.001 wt %.

Assignments (4)

TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS FILED AT R/F 025795/0627 Recorded Oct 1, 2013

From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT

To: CHEMETALL FOOTE CORP.

Reel/Frame 031324/0815 →

CHANGE OF NAME Recorded Apr 24, 2012

From: CHEMETALL FOOTE CORPORATION

To: ROCKWOOD LITHIUM INC.

Reel/Frame 028123/0563 →

CHANGE OF NAME Recorded Apr 23, 2012

From: CHEMETALL FOOTE CORP.

To: ROCKWOOD LITHIUM INC.