METHOD OF PRODUCING COPPER POWDER FROM COPPER-CONTAINING AMMONIATE WASTES Russian patent published in 2012 - IPC C22B7/00 C25C1/12 

FIELD: chemistry.

SUBSTANCE: method involves dissolving wastes and subsequent electrolysis of the solution, and is characterised by that electrolysis is carried out on vibrating electrodes at current density of 0.2-0.5 A/cm². The anode is made from anodised lead and electrolyte components are in the following ratio: 40-60 g/l sodium chloride per 20-30 g/l copper-containing ammoniate wastes. The invention enables to obtain copper powder with particle size of not more than 300 nm, oxygen content of not more than 5% and output higher than 0.031 kg/(m²·h).

EFFECT: high resistance of the copper powder to hydrogen wear in powdered compositions, high corrosion resistance of the powder, high efficiency of recycling copper-containing ammonia wastes.

2 dwg