Method for recovering 99.98% copper powder from etching liquid and preparing 99.999% cathode copper

• Main Authors: WU YUANGUI, LIN KAILIN
• Format: Patent
• Language: Chinese; English
• Published: 22.01.2019
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS

The invention discloses a method for recovering 99.98% copper powder from etching liquid and further processing the copper power to prepare 99.999% cathode copper. According to the method, firstly, the etching liquid is subjected to dialysis in an electrodialysis cell containing a copper sulphate solution, and copper ions in the etching liquid enter the copper sulphate solution, so that a high-concentration copper sulphate solution is obtained; then the high-concentration copper sulphate solution is introduced into an electrolytic cell for electrolysis, so that the high-purity copper powder isobtained; then the high-purity copper powder is pressed into a brick, the copper brick is placed in a conductive frame made from a titanium material, and is used as an anode, a pure titanium board isadopted as a cathode, and refining is conducted in the electrolytic cell so that the cathode copper with purity of 99.999% can be obtained at the cathode of the electrolytic cell. The method belongsto the field of ageing etch