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Gravure printing plate waste liquid treatment process
Patent Name: Gravure Printing Platemaking Wastewater Treatment Process Patent Applicant Wenzhou Normal University Principal Applicant Address 325027 Inventor of Wenzhou East College Road, Li Xinhua Application (Patent) No. 200410016657.3 Date of Application 2004.02.26 Certification Date Approval Publication No. 1660704 Validation Announcement date 2005.08.31 Manual Disc number D0535 Main classification number C02F1/62 C02F9/04; C02F9/04; C02F9/02;//(C02F9/04,1:70,1:72) Division Original application No. First The present invention discloses a process for treating gravure platemaking waste liquid, comprising the following process steps: a. determining the concentration of copper ions in the waste liquid, and calculating the amount of iron powder and hydrogen peroxide required for the waste liquid to be treated; b. The waste liquid is added with the calculated amount of iron powder to fully react. After the reaction is completed, the solid phase is separated from the liquid phase by filtration, and the solid phase is used for extracting copper for reuse; c. The calculated amount is added to the liquid phase of step b. Hydrogen peroxide reacted well. After the reaction was completed, FeCl#-[3] crystals were added and the FeCl#-[3] solution was saturated, which was then reused for copper washing. This not only solves the problem of heavy metal ion pollution to the environment, but also recycles the waste liquid and saves resources. Sovereignty item 1, a process for treating the gravure platemaking effluent, characterized by the following process steps: a. determining the concentration of copper ions in the effluent, and calculating the amount of iron powder and hydrogen peroxide required for the waste liquid to be treated; b. The waste liquid is added with the calculated amount of iron powder to fully react. After the reaction is completed, the solid phase is separated from the liquid phase by filtration, and the solid phase is used for extracting copper for reuse; c. The calculated amount is added to the liquid phase of step b. Hydrogen peroxide reacted well and after the reaction was completed, ferric chloride crystals were further added to saturate the ferric chloride solution. International Application International Publication Entering Country Date Patent Agency Wenzhou Gaoxiang Patent Office Agency Address Agent Chen Gankang