Application of solvent extraction to the refining of precious metals-III Purification of gold.

A procedure for the separation of gold from precious metal concentrates, based on its extraction by "dibutyl carbitol", is described. Spectrographic analyses indicate that the resultant metal is of high purity and tests have shown that recovery of the element is essentially quantitative. It appears that advantages could ensue from the incorporation of a scaled-up version of the procedure in an industrial process for the refining of precious metals.