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:
Jun. 29, 1993
Filed:
Jan. 30, 1991
Applicant:
Inventors:
Farouk T Awadalla, Hull, CA;
Gordon M Ritcey, Nepean, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75741 ;
Abstract
A process is disclosed for the direct recovery of gold from thiourea, thiocyanate or thiosulfate solutions or acidified thiourea leach liquor. The process comprises reduction precipitation of the gold from solution by the addition of stabilized alkali metal borohydride, preferably sodium or potassium borohydride, at ambient temperature and pressure. The resulting gold precipitate is generally of high purity and is readily separated by filtration. The barren solution is in a condition such that it can be recycled to the upstream process.
Awadalla, Farouk. (1993). Recovery of gold from solution by reduction-precipitation with (U.S. Patent No. 5223023). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5223023
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile