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:
Oct. 19, 1993
Filed:
Jan. 06, 1992
Applicant:
Inventor:
Terry I Mudder, Duvall, WA (US);
Assignee:
Cyprus Minerals Company, Englewood, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ; C01C / ;
U.S. Cl.
CPC ...
75732 ; 75735 ; 75737 ; 75741 ; 423 29 ; 423 30 ; 423 31 ; 423379 ;
Abstract
A process for recycling hydrogen cyanide from a cyanide-containing slurry is provided. The process includes the steps of adjusting the pH of a cyanide-containing slurry, volatilizing HCN contained in the pH adjusted slurry and contacting the volatilized HCN with a precious metals-containing slurry to recover precious metals therefrom. Alternatively, the HCN can be contacted with reclaim, or decant, water to recover cyanide, thereby conserving resources.