Separating Platinum from Gold During the Early
The inquartation method of separating gold and platinum was investigated in Europe by several scientists. The first of these was the Frenchman Mathieu Tillet, (1714–1791), the Royal Commissioner for Assays and Refining at the Paris Mint, who in 1779 published three articles about this method (23, 24, 25). In these he said that a good separation will always be achievedProcessing, smelting and refining gold | World Gold,The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it produces gold of only about 99.5 percent purity. The Wohlwill process increases purity to about 99.99 percent by electrolysis.Selective separation of gold from iron ore samples using,,01/12/2003· Abstract. Gold in iron ore samples is separated from iron (major matrix cation), antimony and vanadium using anion exchange resin in (0.2 M) HBr, potassium peroxodisulfate and acetone:water:nitric acid media. The exchangeable anion Cl − of the ion exchanger Dowex 1X 4 is replaced by Br − using (6 M) HBr solution.