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:
Dec. 02, 2014
Filed:
Jan. 07, 2011
Applicant:
Yeonuk Choi, Oakville, CA;
Inventor:
Yeonuk Choi, Oakville, CA;
Assignee:
Barrick Gold Corporation, Toronto, Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G 9/00 (2006.01); C01B 17/96 (2006.01); C01F 11/46 (2006.01); C21B 3/02 (2006.01); C21B 11/10 (2006.01); C22B 19/20 (2006.01); C22B 19/00 (2006.01); C01G 9/02 (2006.01); C01G 9/06 (2006.01);
U.S. Cl.
CPC ...
C01F 11/46 (2013.01); C01G 9/02 (2013.01); C01G 9/06 (2013.01);
Abstract
In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.