Process for the separation and purification of platinum ...
Cu, Ni, Sn, Se were present as base metals and the pH of the feed liquor was approximately 3. When carrying out the process of the invention using this feed liquor, the tertiary amine used at stages (c) and (f) was a water-insoluble straight chain, saturated tertiary amine R 3 N. The alkyl groups R, were a C 8-C 10 mixture with the C 8 carbon chain predominating.
