METHOD OF NOBLE METALS EXTRACTION FROM SOLUTIONS, CONTAINING NON-FERROUS METALS Russian patent published in 2009 - IPC C22B11/00 C22B3/44 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of noble metals metallurgy, particularly to process of noble metals selective extraction from solutions, containing non-ferrous metals. Noble metals are extracted by water solution of clathrate didecyl-dimethyl-ammonium of bromide with carbamide with sedimentation and receiving of residue, which is separated by filtration. Sedimentation in the form of organic complex salts noble metals is implemented at blending. Received reacting mass is settled, filtrated and flushed residue by diluted solution of hydrochloric acid. From residue of organic complex salts noble metals are recovered by hydrazine hydrate at presence of defoaming agent. Solution, received as a result of recovery of noble metals from organic complex, is used for extraction of noble metals in following treatment cycle of solutions, containing non-ferrous metals.

EFFECT: increasing of energy content and process capacity.

2 cl, 4 tbl, 3 ex