FIELD: rare metals technology. SUBSTANCE: osmium is isolated from chromium-containing raw material is accomplished by sorption with alkali-earth metal hydroxide at ratio of the latter to osmium from 20:1 to 100:1. Such procedure allows complete recovery of osmium from chromate solutions containing 0.1 to 1 g/l of osmium. EFFECT: avoided dependence of osmium recovery results from content of chromium(VI) within a large range (10 to 100 g/l). 1 tbl, 4 ex
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