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. 16, 1981
Filed:
Mar. 27, 1980
Michihide Okugawa, Hyogo, JP;
Ryougi Ishii, Hyogo, JP;
Dainichi-Nippon Cables, Ltd., Hyogo, JP;
Abstract
This invention relates to a process for treating a liquid containing an Au-CN compound and optionally an Ag-CN compound to decompose the compound(s) and, at the same time, separate gold and optionally silver from the liquid with ease. When containing the Au-CN compound alone, the liquid is heated at a temperature of at least 170.degree. C. in the presence of at least 0.1 mole of a water-soluble metallic hydroxide per gram atom of the gold in the Au-CN compound. When containing the Au-CN compound and the Ag-CN compound, the liquid is heated at a temperature of at least 170.degree. C. in the presence of a water-soluble metallic hydroxide in a total amount of at least 0.1 mole per gram atom of the gold in the Au-CN compound and at least 0.05 mole per gram atom of the silver in the Ag-CN compound. The compound(s) in the liquid are fully decomposable, and at the same time, gold or both gold and silver can be separated out from the liquid singly as such and recovered with a high recovery rate(s).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile