Method for preparing ozone heterogeneous oxidation solid catalysts

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 attapulgite, diopside, sepiolite, feldspar, perlite and albite porous materials as carriers, and the carrier is modified by lithium hypochlorite and bis(acetylacetonate) beryllium for pore expansion. , adding the surfactant dieicosyldimethylammonium chloride to carry out surface activation treatment under the action of ultrasonic waves, and then the ultrasonic surface activation carrier is mixed with the composite mineralizer borax and potassium sulfate in the hydrothermal reaction kettle, and the catalytic activity assistant Precursors tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionate)cerium(IV), tris(4,4,4-trifluoro-1-(2-thiophene)-1 ,3-butanedione) europium, tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octenedione) dysprosium(III), Tris[N,N-bis(trimethylsilane)amine]erbium rare earth organometallic compound, catalytic active center component precursor common transition metal organic compound manganese lysine, ammonium zirconium carbonate and noble metal compound palladium dichlorotetraammine , iridium tetrachloride dihydrate, under the action of emulsifier m-nitrobenzyl dimethyl ammonium bromide, carry out hydrothermal reaction, after the reaction product is dried to remove moisture, it is burned in a muffle furnace at a certain temperature to obtain ozone Homogeneous oxidation of solid catalysts.

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...

AI Technical Summary

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 organometallic compounds as catalyst precursors, common transition metal organic compounds and noble metal compounds as catalyst active center precursors, and multi-component porous supports are prepared by hydrothermal reaction and high-temperature calcination to prepare multi-metal-containing ozone heterogeneous oxidation 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 for 3h-6h,