Patent ID: 7749470

Claim:
A method for processing waste copper liquid to produce high copper content sludge, comprising the steps of: mixing an acidic low concentration copper waste liquid with a strong alkali to adjust said acidic low concentration copper waste liquid to a pH value of between 8.5˜9.5, then add coagulating agent and a polymer to said acidic low concentration copper waste liquid to cause a reaction to form a copper hydroxide (Cu(OH)2) sludge; and then mixing the copper hydroxide sludge with an oxidized acidic high concentration copper waste liquid to adjust said oxidized acidic high concentration copper waste liquid to a pH value of between 0.5˜2.0; and after mixing to a pH value between 0.5˜2.0 upon the completion of the above steps, add in the strong alkali to said oxidized acidic high concentration copper waste liquid to adjust a pH value of said oxidized acidic high concentration copper waste liquid to above 10 for carrying out a reaction and forming a cupric oxide (CuO) sludge; and the cupric oxide sludge generated by a chemical reaction from the above steps undergoes dehydration and baking to lower water content of said cupric oxide sludge to get a higher copper content cupric oxide (CuO) sludge.