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refining red gold mud from reverse electroplating

Purification of Gold by Electrolysis The Moebius Process of Purification of Gold by Electrolysis is now in successful operation and is said to be specially suitable for refining copper bullion containing large proportions of silver and gold with small quantities of lead, platinum, and other metals, but is chiefly used in parting dore silver containing not more than 20 per 1,000 of base metals. 10100101. 10100102. 10100201. 10100202. 10100203. 10100204. 10100205. 10100211. 10100212. 10100215. 10100217. 10100218. 10100221. 10100222. 10100223. 10100224 ... Extraction of Gold - Element Gold, Au, Transition Metal The so-called " brown gold " is formed by the action of nitric acid on an alloy of gold and silver containing 20 per cent, of gold. The silver dissolves, leaving the gold as a brown, spongy sheet, reconverted at 1040° C. into ordinary gold.    Read More

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