METHOD OF PROCESSING COPPER-CONTAINING MATERIALS Russian patent published in 2015 - IPC C22B15/00 C22B7/00 C22B3/08 

FIELD: chemistry.

SUBSTANCE: method of processing copper-containing materials includes dissolution of copper with sulphuric acid solution and crystallisation of copper sulphate pentahydrate from solution. After that, correction of mother liquor composition is realised for its re-use. Copper dissolution is realised in presence of copper nitrate, which serves as catalyst of dissolution process and which is prepared by dissolution of copper in nitric acid solution, concentration of which does not exceed 200 g/l. Correction of mother liquor composition is realised by control of copper nitrate concentration by qualitative reaction with diphenylamine in mother liquor.

EFFECT: intensification of process of copper dissolution in sulphuric acid due to presence of catalyst in system and elimination of target product pollution.

2 cl, 3 tbl, 2 ex