Tellurium extraction from copper electrorefining slimes

Details Tellurium extraction from copper electrorefining slimes Tellurium extraction from copper electrorefining slimes

1998-07-27

1999-08-17

Bos, Steven

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

423509, 423510, C01B 1900

Patent

active

059390425

ABSTRACT:
The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag.sub.2 Se or Ag.sub.2 S, which remains insoluble during autoclave leaching.

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"Leaching Of Cu Refinery Slimes", T. De Decker, A. Backx, and A. Van Petegh, 1976, no month.

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