Rapid, ambient-temperature process for stripping gold bound to a

Details Rapid, ambient-temperature process for stripping gold bound to a Rapid, ambient-temperature process for stripping gold bound to a

1991-01-23

1993-01-05

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 24, C01G 700, B01D 1504

Patent

active

051768860

ABSTRACT:
An improved process for stripping gold cyanide from activated carbon is disclosed. The process involves contact of gold-laden activated carbon with a strong base at ambient temperatures followed by elution with an aqueous solution containing an organic solvent, preferably aqueous acetonitrile or methanol. Gold cyanide is separated from the aqueous/organic solution by ion-exchange technology, preferably using a weak base ion-exchange resin, followed by elution with a strong base.

REFERENCES:
patent: 3935006 (1976-01-01), Fisher
patent: 4208378 (1980-06-01), Heinen et al.
patent: 4372830 (1983-02-01), Law
patent: 4427571 (1984-01-01), Parker et al.
patent: 4968346 (1990-11-01), Belsak et al.
Robert S. Boikess and Edward Edelson, Chemical Principles, 2d Ed. (New York; Harper & Row Publishers), 1981, Chapter 15 "Acids and Bases," pp. 486-490.
Ralph H. Petrucci, General Chemistry, Principles and Modern Applications, 2d Ed. (New York; Macmillan Publishing Co., Inc.), 1977, Chapter 16 "Acids, Bases, and Ionic Equilibria," pp. 395-396.
Stephen Stoker, Introduction to Chemical Principles (New York: Macmillan Publishing Co., Inc.), 1983, Chapter 14, Section 4.2 "Strengths of Acids and Bases," pp. 376-378.
Donald A. McQuarrie and Peter A. Rock, General Chemistry, 3rd Ed. (New York; W. H. Freeman and Company), 1987, Chapter 18 "Acids and Bases," pp. 637-638.
James E. Brady, General Chemistry, Principles and Structure (New York; John Wiley & Sons, Inc.), 1990, Chapter 5 "Chemical reactions in Aqueous Solution," pp. 128-129.
M. K. Snyder, Chemistry, Structures and Reactions, Holt, Rinehart and Winston, Inc., New York, pp. title page, 544, 739 (1966).
D. M. Muir et al., "Solvent Elution of Gold from C.I.P. Carbon", Hydrometallurgy, vol. 14, pp. 47-65, (1985).
F. Espiell et al., "Gold Desorption from Activated Carbon with Dilute NaOH/Organic Solvent Mixtures", Hydrometallurgy, vol. 19. pp. 321-333 (1988).
W. T. Yen et al., "Carbon Stripping at Ambient Temperature", Precious Metals 1989, Proceeding of the Thirteenth International Precious Metals Institute Conference, International Precious Metals Institute, Allentown, Pa., pp. 261-274 (1989).
"Biochemical and Organic Compounds for Research and Diagnostic Clinical Reagents", 1988 Sigma Chemical Company, pp. 816-823.

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