METHOD FOR DISTILLING OSMIUM TO GASEOUS PHASE Russian patent published in 2007 - IPC C22B11/00 C22B1/02

Abstract RU 2296171 C2

FIELD: inorganic chemistry, chemical technology.

SUBSTANCE: invention relates to metallurgy of metals of platinum group and can be used effectively in extraction of metal osmium from waste in copper manufacture. Method involves preliminary distillation of organic components in reductive medium from the parent raw representing sulfate slimes of copper manufacture. Cinder is treated with sulfuric acid at simultaneous stirring resulting to conversion of PbS to PbSO₄. Prepared cake is heated to temperature 100-105° in oxygen medium to oxidize Os to OsO₄ and its conversion to a volatile phase. Osmium is extracted from exhausting gases by known methods. Method provides elimination of steps for complex hydrometallurgic distillation of osmium and exclusion in use of expensive and hazard oxidizing agent.

EFFECT: improved distilling method.

1 dwg

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RU 2 296 171 C2

Authors

Dates

2007-03-27—Published

2004-08-11—Filed