FIELD: platinum group metal chemistry.
SUBSTANCE: palladium is dissolved in mixture of concentrated hydrochloric and nitric acids at volume ratio of (7/5-12):1. Palladium and nitric acid at mass ratio of (1-2.5):1 are gradually added in hydrochloric acid. Precipitate is concentrated, crystallized and dried at 85-950C by using IR-rays. Dried precipitate is crushed up to 150-300 mum by using disk scuffer.
EFFECT: accelerated process with increased dissolution rate; reduced nitric oxide exhaust and palladium losses.
2 cl, 3 ex
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