METHOD FOR PROCESSING OF EXHAUSTED SOLUTION COMPRISING IONS OF HEAVY NONFERROUS METALS OR THEIR ALLOYS Russian patent published in 1998 - IPC

FIELD: ecology; processing of exhausted dipping solutions and electrolytes comprising ions of heavy nonferrous metals or their alloys into useful products. SUBSTANCE: solutions comprising ions of heavy nonferrous metals or their alloys are treated by waste of metal working. The process is followed by precipitation which takes place with the help of compounds comprising phosphate ions and by separation thus prepared precipitate of solution. Waste of aluminium, waste of copper or waste of alloys of nonferrous metals are used as mentioned above waste of metal working. Waste of degreasing bath comprising phosphate ions are used as reagent for precipitation. Thus obtained products may be used as pigment paste. EFFECT: improved efficiency of the method. 4 cl