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<p>[QUOTE=&quot;justafarmer, post: 3217230, member: 3926&quot;]<a href="https://goldchat.blogspot.com/2008/06/gold-value-chain-part-ii-refining.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://goldchat.blogspot.com/2008/06/gold-value-chain-part-ii-refining.html" rel="nofollow">https://goldchat.blogspot.com/2008/06/gold-value-chain-part-ii-refining.html</a></p><p><br /></p><p>&quot;With purity, 99.5% purity gold can be produced using a chlorination process (impure gold is melted and gaseous chlorine is blown through it with the impurities joining with the chlorine). It is rapid and simple and therefore cheap but only goes up to 99.5%. To get to 99.99% you need an electrolytic process (stick impure gold into a solution of hydrochloric acid and gold chloride, pass an electric current through it, the gold dissolves and pure gold moves to a negatively charged electrode). Problem is that this process costs more, mainly due to the need to keep an inventory of gold chloride on hand. It is also slower than chlorination, so you tie up gold in the process for longer.&quot;[/QUOTE]</p><p><br /></p>

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