This attractive method of separating gold from silver has made some headway, and will in many cases replace other methods of parting. The electrolyte used is
Pure silver is readily attacked by strong hot sulphuric acid of SG 1.815, or about 90 per cent, strength. The reaction which takes place may be
The usual method of recovering silver from these solutions is to precipitate the silver by means of common salt. From an ordinary alloy the only
The method of gold parting with nitric acid usually consists in: Granulating the alloy, which should he free from antimony, tin, or sulphides. Treating with
The process of parting gold with nitric acid is old, and probably dates from the discovery of nitric acid itself; it is one of the
The term refining has been very often applied to the removal of base metals from the noble ones, or, in other words, separating the oxidizable
The how-to method of removing oxidisable metals by means of an oxidising agent has been practised for centuries. The operation has already been described in
Older processes explaining how to go about separating silver from gold by cementation were carried on practically in two ways, the first by heating gold for
Name Chemical Composition %U3O8 Color Luster Hardness Specific Gravity SG Characteristics & Occurrence Pitchblende Uranium oxide 50-80 Black (Grayish, Greenish) Pitch like Earthy, Dull or Glassy
Refining with Sulphur A more speedy method of removing iron, copper, lead and base metals from bullion is to add sulphur to the molten metals.