Vereinigte Metallwerke Ranshofen-berndorf Aktiengesellschaft

Austria Metal Aktiengesellschaft

Helmut Worz

Josef Bertha

Jakob Biechl

Hermann Leuprecht

Jorg Wallner

A hydrometallurgical process for enrichment of gold, platinum and palladium from copper electrolysis anode sludge, and simultaneously recovery of selenium, in which the sludge is treated with Cl.sub.2 /HCl to transform the selenium of a hexavelent state and precipitate out silver chloride. The filtrate is then subjected to selective reduction of precipitate the noble metals and the resulting filtrate is chlorinated and a further reduction is effected to precipitate the metallic selenium.

Hydrometallurgical process for the separation and enrichment of gold,

A method for the removal of impurities from copper cathodes withdrawn from a copper electrorefining bath in which the cathodes are subjected to ultrasonic vibrations in the KHz. range in heated water which is circulated or subjected to jets and under conditions in which cavitation bubbles can develop along the surfaces of the cathode.

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Brixlegg, Austria

Helmut Worz