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    Gold parting is the separating of gold from and electrolysis using the Wohlwill process are the most widely used methods of refining gold by removing silver

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    Extraction is often followed by refining, chemically inactive metals such as gold and platinum are found in pure or nearly pure Keep Exploring Britannica

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    Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron Two methods are commonly employed for

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    gold Ore Dressing Depending upon their composition, gold ores are treated by a variety of methods, either singly or in combination The processes commonly used

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    petroleum refining: conversion of crude oil into useful products

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    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

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