Additives for recycling copper

• Main Authors: CUI LEI, ZHANG LIANG, LU JIANGFENG, LIU ZHIKAI, LI JIANGUANG
• Format: Patent
• Language: Chinese; English
• Published: 02.03.2018
• Subjects: APPARATUS THEREFOR; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides additives for recycling copper, and relates to the technical field of material preparation. The additives comprise 10-50 ppm of a brightener, 10-30 ppm of a leveling agent and 5-20 ppm of a surface active agent. By adding the additives including the brightener, the leveling agent and the surface active agent in etching liquid, the overpotential is improved, polarization is increased, the electrode reaction speed is reduced, and a fine-grain and bright copper clad layer is finally obtained. Therefore, a copper layer with a bright and flat surface, high purity, a compact structure and ductility is obtained through recycling. 本发明提供种回收铜的添加剂，涉及材料制备技术领域。其中，该添加剂包括：光亮剂10～50ppm、整平剂10～30ppm和表面活性剂5～20ppm。通过在刻蚀液中加入包含光亮剂、整平剂和表面活性剂的添加剂，可以提高过电位，增加极化，减慢电极反应速率，最终获得晶粒细小、光亮的铜镀层。从而可以回收得到表面光亮平整，纯度高，结构致密，富有延展性的铜层。