The conclusion is: producing copper sulfate technology is achieved part resource but dangerous to environment;cyclic regeneration technology is not only achieved all the resource but also security to environment,it's a cleaner production.

A new method for copper removal from nickel anodic electrolyte is studied with ion exchange after its deoxidization by comparing all kinds of ways for copper removal at home and abroad.

According to the characteristics of copper wire drawing wastewater which has high concentration and is difficult to be treated, a combination process of oil removal, copper removal, coagulation and recycle has been developed.

The impact of sulphur overcharge percentage,heating temperature and heating time on percent formation of PbS are studied,and the PbS overcharge percentage,heating time and agitation time for decoppering from lead bullion are investigated .

The content of copper in the Indanthren Olive T decreased from about 1000ppm to below 50ppm through decoppering by dilute hydrochloric acid.

Technology study of removing copper in the nitric nickel solution by interchange method;

The results show that the ratio of removing copper is greater than 99% in the range of pH=3～6 and the mass concentration of Cu 2+ =30～600 mg/L.

New highly effective removing copper reagent, NAS, was obtained through lead generation by molecule modification based on the theory of isostere principle.