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Title: Method for aqueous gold thiosulfate extraction using copper-cyanide pretreated carbon adsorption

Abstract

A gold thiosulfate leaching process uses carbon to remove gold from the leach liquor. The activated carbon is pretreated with copper cyanide. A copper (on the carbon) to gold (in solution) ratio of at least 1.5 optimizes gold recovery from solution. To recover the gold from the carbon, conventional elution technology works but is dependent on the copper to gold ratio on the carbon.

Inventors:
; ;
Issue Date:
Research Org.:
Virginia Polytechnic Institute & State University (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
1089418
Patent Number(s):
8500847
Application Number:
13/094,139
Assignee:
NETL
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
DOE Contract Number:  
FC26-02NT41607; FC26-05NT42457
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Young, Courtney, Melashvili, Mariam, and Gow, Nicholas V. Method for aqueous gold thiosulfate extraction using copper-cyanide pretreated carbon adsorption. United States: N. p., 2013. Web.
Young, Courtney, Melashvili, Mariam, & Gow, Nicholas V. Method for aqueous gold thiosulfate extraction using copper-cyanide pretreated carbon adsorption. United States.
Young, Courtney, Melashvili, Mariam, and Gow, Nicholas V. Tue . "Method for aqueous gold thiosulfate extraction using copper-cyanide pretreated carbon adsorption". United States. https://www.osti.gov/servlets/purl/1089418.
@article{osti_1089418,
title = {Method for aqueous gold thiosulfate extraction using copper-cyanide pretreated carbon adsorption},
author = {Young, Courtney and Melashvili, Mariam and Gow, Nicholas V},
abstractNote = {A gold thiosulfate leaching process uses carbon to remove gold from the leach liquor. The activated carbon is pretreated with copper cyanide. A copper (on the carbon) to gold (in solution) ratio of at least 1.5 optimizes gold recovery from solution. To recover the gold from the carbon, conventional elution technology works but is dependent on the copper to gold ratio on the carbon.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {8}
}

Patent:

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