Book Synopsis The Recovery of Gold from Thiourea Leach Liquors with Activated Carbon by :
Download or read book The Recovery of Gold from Thiourea Leach Liquors with Activated Carbon written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The extraction of the gold-thiourea complex from aqueous leach liquors with activated carbon is examined, and the important factors that influence the rate of loading and the loading capacity are identified. It is shown that, under most conditions that would be experienced in a practical leaching situation, the gold-thiourea complex is loaded onto the carbon without undergoing any chemical changes. In addition, the loading capacity of the carbon is suppressed by the chemicals that are required for effective leaching (excess thiourea and ferric ions) and, in this respect, the leaching process and the gold-extraction process are antagonistic. Other parameters that influence the loading characteristics are the pH of the leach liquor, the concentration of anions in solution, and the temperature. Various methods for the elution of the gold-thiourea complex from activated carbon are examined and optimized.