Ozone heterogeneous oxidation solid catalyst preparation method

Abstract

The invention relates to a preparation method of a solid catalyst for ozone heterogeneous oxidation, which belongs to the technical fields of environmental protection and chemical catalysts. The preparation method is to use γ-alumina, barite, activated carbon, carnallite, dolomite and calcite porous materials as carriers, and after the carrier is modified by lithium hypochlorite and bis(acetylacetonate) beryllium to expand pores, add surface active The agent ditetradecyldimethyl ammonium chloride is subjected to surface activation treatment under the action of ultrasonic waves, and then the ultrasonic surface activation carrier is combined with the composite mineralizer borax and potassium sulfate in a hydrothermal reaction kettle, and the catalytic activity auxiliary agent precursor four ( 2,2,6,6-tetramethyl-3,5-heptanedionate)cerium(IV), tris(3-trifluoroacetyl-D-camphor)praseodymium(III), thulium trifluoromethanesulfonate (III), Tris(trifluoromethanesulfonylimide) ytterbium rare earth metal organic compound, catalytic active center component precursor common transition metal organic compound lysine manganese, copper glutamate and noble metal compound silver dithiocyanate (1) Potassium acid, trisodium hexanitroso rhodium, carry out hydrothermal reaction under the effect of emulsifier 2,6-bis(diethylaminomethyl)-4-nonylphenol-epichlorohydrin quaternary ammonium salt, After the reaction product is dried to remove moisture, it is burned in a muffle furnace at a certain temperature to obtain a solid catalyst for ozone heterogeneous oxidation.

Description

technical field [0001] The invention relates to a preparation method of a solid catalyst for ozone heterogeneous oxidation, which belongs to the technical fields of environmental protection and chemical catalysts. Background technique [0002] Ozone oxidation technology utilizes the strong oxidation ability of ozone, which can oxidize and decompose many organic pollutants, and is widely used in wastewater treatment. Ozone catalytic oxidation technology is divided into ozone homogeneous catalytic oxidation and ozone heterogeneous catalytic oxidation. Ozone homogeneous catalytic oxidation has catalysts that are difficult to separate, recycle and reuse, and the low utilization rate of ozone leads to high water treatment operation costs. Ozone heterogeneous catalytic oxidation technology has the advantages of easy separation and recovery of catalysts and reusable use, high ozone utilization rate, and high removal rate of organic pollutants, which reduces water treatment. The ad...

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Problems solved by technology

[0004] In view of the problems of low catalyst adsorption, poor anti-toxicity and easy loss of catalytic activity in the current preparation method of ozone heterogeneous oxidation solid catalyst, a multi-component porous carrier was developed to enhance the adsorption of the catalyst through pore expansion and surface activation. Rare earth metal organic compounds as precursors of catalytic active additives, common transition metal organic compounds and noble metal compounds as precursors of catalytic active centers and multi-component porous carriers through hydrothermal reaction and high temperature calcination to prepare ozone heterogeneous oxidation containing multiple metals The preparation method of solid catalyst to improve the anti-toxicity and catalytic activity of the catalyst is characterized in that component A and deionized water are added into a sealable reactor and stirred to prepare an aqueous solution, and the weight concentration of component A is controlled to be 2% to 6%. After the preparation is completed, add component B under stirring, raise the temperature to 35°C-50°C, continue to stir

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