Kinetics and Mechanism of Platinum Pressure-Cyanide Dissolution

Abstract:

A research study has been undertaken to develop the fundamentals of a method for the direct dissolution of metal platinum. At room temperature and pressures, the reaction between sodium cyanide and platinum group metals (PGMs) does not occur because of poor kinetics. However, at elevated temperatures, PGMs can be dissolved by sodium cyanide like the reaction of gold. In this work, the dissolution of Platinum was measured in pressure clear cyanide solution. The data at different cyanide concentrations, temperature and oxygen pressure are obtained. With increasing cyanide concentration and oxygen pressure, the dissolution first increased to a maximum value and then decreased. With increasing temperature the dissolution is increased.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 424-428
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.424
• Online since: February 2014
• Authors: J.S. Zhao, J.H. Dai
• Keywords: Dissolution, Metal Platinum Powder, Platinum Group Metals, Pressure Cyanidation

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DOI: 10.1016/0013-4686(74)85078-4