A copper electrolyte purification process

A copper electrolyte solution purification process is the copper electrolyte or preform after copper removal was added to the adsorption or crystallization dedoping copper or copper electrolyte solution after the pre-treatment after the removal crystallization agent is added, crystallization in copper-nickel complex salt, double salt of the resulting copper-nickel separation and recovery of copper and nickel, copper electrolyte purification achieved; heteroaryl adsorption removal treatment using antimony and / or bismuth oxides and their hydrates as adsorbent, selectively adsorbing copper electrolyte impurities as , Sb, Bi, Cu can eliminate dark mud, and the occurrence of black copper in the copper electrolyte AsH3 gas purification process. The present invention has simple process, easy to operate, low cost, high efficiency, good working environment, etc., suitable for the purification of copper electrolyte industrial applications.