Behavior of Platinum Metals During Electrolytic Refining of Nickel Anodes.

It is shown that the transfer of platinum metals into the solution in copper and nickel electrolytic refining operations is determined by the anode potential and also depends on the composition of the solution and the nature of the alloy. During electrolytic refining of platinum-containing nickel and copper alloys platinum metals precipitate into the sludge in the form of extremely dispersed x-ray amorphous metal particles - atomic aggregates which are converted to the crystalline state during heating.