Studies on the extraction and determination of metal salts with isobutyl methyl ketone-XIV Extraction of gold.
The isobutyl methyl ketone extraction of gold(III) from hydrochloric acid or various mixtures of hydrochloric and other mineral acids was studied as a function of the gold concentration and the acid concentration. Gold (initial concentration up to 5 x 10(-3)M) was quantitatively extracted (99%) from 3-5M hydrochloric acid. Addition of nitric acid in 1-5M concentration and sulphuric or perchloric acid in 1-3N concentration to the 1-5M hydrochloric acid solutions used had no effect.
Ichinose
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Research Institute for Iron, Steel and other Metals Tohoku University, Sendai-shi, Japan.