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:
Jul. 18, 2000
Filed:
Jul. 30, 1997
Applicant:
Inventors:
Harry M Castrantas, Newtown, PA (US);
James L Manganaro, Princeton, NJ (US);
Ralph S Mikida, West Seneca, NY (US);
William Johnson, Yardley, PA (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ; C01B / ;
U.S. Cl.
CPC ...
210759 ; 210904 ; 423513 ; 423521 ;
Abstract
A process for treating precious metal tailing slurries with Caro's acid, in which the Caro's acid is accompanied by reduced amounts of Caro's acid mist, is disclosed. The hot Caro's acid-containing mixture, formed by reaction of concentrated sulfuric acid and hydrogen peroxide, is quenched with water to reduce or eliminate the Caro's acid mist. The resulting cooled and diluted mixture is introduced into a precious metal tailings slurry to reduce the amount of cyanide values in the slurry.