Parkes process


Parkes process:

see silversilver,
metallic chemical element; symbol Ag [Lat. argentum]; at. no. 47; at. wt. 107.8682; m.p. 961.93&degC;; b.p. 2,212&degC;; sp. gr. 10.5 at 20&degC;; valence +1 or +2.
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Parkes process

[′pärks ‚prä·səs] (metallurgy) A process for recovering precious metals from lead by stirring about 2% zinc into the melt to form zinc compounds with gold and silver which can then be skimmed off the surface.