СПОСОБ СЕЛЕКТИВНОГО ИЗВЛЕЧЕНИЯ ОСМИЯ И РУТЕНИЯ

摘要

FIELD: chemistry. ^ SUBSTANCE: invention can be used in refining platinum-group metals. A residue consisting of a mixture of hydrated oxides of osmium and ruthenium is saturated with water. The obtained pulp is treated with hydrochloric acid and oxidising agent until dissolution of the residue while heating. The oxidising agent used is hydrogen peroxide or sodium chlorate. Osmium oxide is removed by sucking through an air system. The solution remaining after removal of osmium is filtered, treated with concentrated hydrochloric acid and heated for 2 hours. Ammonium chloride is added and ammonium chlororuthenate is precipitated. The obtained salt is washed from the mother solution. ^ EFFECT: selective extraction of osmium and ruthenium, shorter duration of the process and reduced consumption of reagents. ^ 1 tbl, 1 ex