The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2019
Filed:
Jun. 30, 2015
Applicant:
Search Minerals Inc., North Vancouver, CA;
Inventors:
David Dreisinger, North Vancouver, CA;
Cornelis Verbaan, North Vancouver, CA;
Assignee:
Search Minerals Inc., North Vancouver, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22B 59/00 (2006.01); C22B 1/00 (2006.01); C22B 3/08 (2006.01); C22B 3/46 (2006.01);
U.S. Cl.
CPC ...
C22B 59/00 (2013.01); C22B 1/00 (2013.01); C22B 3/08 (2013.01); C22B 3/46 (2013.01); Y02P 10/234 (2015.11);
Abstract
The invention provides hydrometallurgical processes for the recovery of rare earth values from ore, using simple crushing without beneficiation to produce an enriched and purified mixed rare earth concentrate. Ore is crushed to a relatively coarse particle size, and then treated with relatively small amounts of acid, at a relatively modest elevated temperature, to render the rare earth elements extractable in a subsequent water leach.