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:
Mar. 20, 2018
Filed:
Sep. 16, 2015
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventors:
Ronald V. Davis, Geneva, IL (US);
Daniel E. Child, Spring Creek, NV (US);
Walter Gerlach, Naperville, IL (US);
Assignee:
Ecolab USA Inc., St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B 1/02 (2006.01); C22B 1/26 (2006.01); C22B 11/00 (2006.01); C22B 3/00 (2006.01); C22B 11/08 (2006.01);
U.S. Cl.
CPC ...
C22B 1/26 (2013.01); C22B 1/02 (2013.01); C22B 11/04 (2013.01); C22B 11/08 (2013.01);
Abstract
A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery.