Copper base catalyst for catalyzing wet oxidation method treating industrial waste water

Abstract

The main componens of copper base catalyst are copper, zinc, nickel, magnesium, aluminium, chromium, iron and partial oxide of rare earth metal, in which (by oxide content) CuO is 20-55%, ZnO, NiO or MgO is 20-55%, Cr2O3, Al2O3 of Fe2O3 is 10-40% and rare earth metal oxide is 0-10%. Said catalyst can be made up by roasting catalyst precursor with hydrotalcite-like structure obtained by coprecipitation of salts of various metals. Said catalyst can effectively treat industrial organic waste water containing phenol, sulfosalicylic acid, H-acid and surfactant, etc., not only possesses higher catalytic activity, but also can control the loss of active components.

Description

technical field [0001] The invention relates to a copper-based catalyst used in catalytic wet oxidation treatment of industrial waste water and a preparation method thereof. The main components of the catalyst are oxides of copper, zinc, nickel, magnesium, aluminum, chromium, iron and some rare earth metals. This catalyst not only has high catalytic activity, but also the loss of active components is controlled, and the loss of copper ions is reduced by more than one order of magnitude compared with the previous literature. Background technique [0002] Wet catalytic oxidation (Catalytic Wet Air Oxidation, referred to as CWAO) uses molecular oxygen (air or pure oxygen), under the action of high temperature, high pressure and catalyst, to deeply oxidize organic matter in wastewater under liquid phase conditions, and finally convert it into CO 2 and water, organic nitrogen is converted to N 2 ; Organic phosphorus and organic sulfur are converted into corresponding PO 4 3- ...

AI Technical Summary

Problems solved by technology

The loss concentration of copper ions is around 20mg / l. Although it has been greatly improved compared with the previous catalysts, it still cannot reach the national secondary emission standard of 2mg / L.

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