Method for preparing ammonium-free plating assistant agent by recycling and utilizing low-zinc-contained acid wastewater

The invention discloses a method for preparing an ammonium-free plating assistant agent by recycling and utilizing low-zinc-contained acid wastewater. The method comprises the steps of concentration,oxidation, extraction for iron removal and extraction agent regeneration. The method has the benefici...

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Bibliographische Detailangaben
Hauptverfasser:	WANG GUIYU, ZUO XUANFENG, JIANG YINFENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The invention discloses a method for preparing an ammonium-free plating assistant agent by recycling and utilizing low-zinc-contained acid wastewater. The method comprises the steps of concentration,oxidation, extraction for iron removal and extraction agent regeneration. The method has the beneficial effects that the removal rate of iron in the wastewater can reach 99.0-99.9% after the wastewater is treated, and the recycling rate of zinc can reach 96-98% or above; the treated and recycled ZnCl2 extraction raffinate can meet the plating assistant agent use standard requirements of hot galvanizing enterprises and be sold to hot galvanizing factories; iron-contained hydrochloric acid obtained after reverse extraction can be used for efficient preparation of iron-salt water purifying agentproducts; an extraction agent has high efficiency and high selectivity and can be regenerated and recycled after being subjected to reverse extraction treatment; technological operation is simple, safe, clean and environmental