Method for treating acidic etching waste liquid

• Main Author: LI ZAIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2019
• Subjects: APPARATUS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for treating acidic etching waste liquid. The method comprises the following steps of: electrolyzing the etching waste liquid to convert copper ions in the etching waste liquid into copper simple substances through electrolysis to form copper-removing waste liquid; adding a nickel ion precipitator into the copper-removing waste liquid to precipitate nickel ions inthe copper-removing waste liquid to form a precipitation solution; extracting the precipitation solution to obtain a clear solution; and adding an etching component into the clear solution to prepareetching sub-solution. The technical scheme of the method for treating acidic etching waste liquid can realize the reutilization of the etching waste liquid. 本发明公开一种酸性蚀刻废液的处理方法，包括以下步骤，电解蚀刻废液，以使所述蚀刻废液中的铜离子电解转化成铜单质，形成脱铜废液；向所述脱铜废液中加入镍离子沉淀剂，以使所述脱铜废液中的镍离子沉淀，形成沉淀溶液；提取所述沉淀溶液，得到清液；向所述清液中加入蚀刻组分，制备得到蚀刻子液。可以理解的，本发明的技术方案能够实现蚀刻废液的重复利用。