FIELD: chemistry.
SUBSTANCE: method implies use of organic ion-exchange sorbents in parallel with conversion of platinum metals to actively sorbed form by chlorination. As organic ion-exchange sorbents, highly basic gel anionite Rossion-5, which contains benzyltrimethylamino groups, or low-basic macroporous resin Rossion-10, which contains primary, secondary or tertiary amino groups, is used. The said method implies adding sodium chloride or sodium nitrite to the solution in the presence of sorbents. Sodium nitrite is added to continuously stirred solution at 90°С for 4 hours. The method also implies purging the solution, which contains up to 20 g/l of sodium chloride, with chlorine-air mixture.
EFFECT: improved efficiency of platinum metals extraction.
3 cl, 2 tbl, 2 ex
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