Granted Patent
B2
US 7,858,057 · App. 12/425,733 · Granted Dec 28, 2010
Production of lithium compounds directly from lithium containing brines
Assignee:
Chemetall Foote Corporation
View Patent ↗
Loading inventors, assignments & file history…
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 (2)
1. Solid lithium chloride containing less than 15 ppm sodium as an impurity.
2. Solid lithium chloride containing less than 4 ppm sodium as an impurity.
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.
Reel/Frame 028093/0372 →
SECURITY AGREEMENT
Recorded Feb 15, 2011
From: CHEMETALL FOOTE CORP.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
Reel/Frame 025795/0627 →
Continuity (9)
Provisional Application
6010034000
· Sep 14, 1998
Provisional Application
6009302400
· Jul 16, 1998