PROCEDURE FOR PRODUCTION OF PALLADIUM SOLUBLE IN NITRIC ACID

摘要

FIELD: metallurgy. ^ SUBSTANCE: procedure for production of palladium soluble in nitric acid consists in reduction of suspension of powder of palladium compound. As palladium compound (II) there is used trans-di-ammine-chloride of palladium (II). Reduction is carried out at 50-110C with addition of 20-50 % water solution of sodium formate or 20-70 % water solution of ammonia formate, acidulous with concentrated formic acid to value of pH 3-5 heated to 50-110C and taken at amount of 110-150 % from mole amount of palladium. Reduction is performed at presence of ice acetic acid or its concentrated 70-100 % water solution taken at amount of 200-400 % of mole amount of palladium. ^ EFFECT: stability and simplicity of production of palladium practically completely soluble in nitric acid. ^ 2 tbl, 1 ex