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:
Feb. 19, 1991
Filed:
Oct. 21, 1988
Applicant:
Inventors:
Adrian J Goldstone, Waihi Beach, NZ;
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 ...
423 29 ; 75737 ; 423 30 ; 423 31 ; 423379 ;
Abstract
A process for removing and recovering cyanide from a cyanide-containing solution. The process includes the steps of adjusting the pH of the cyanide-containing solution to between about pH 6 and about pH 9.5, volatilizing the HCN contained in the pH adjusted solution and contacting the volatilized HCN with basic material. Preferably, the cyanide recovery process is performed on tailings slurries resulting from metal recovery processes.