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 diatomite, kyanite, sodium saltpeter, dolomite, amazonite and lithium limestone porous materials as carriers, and after the carrier is modified by lithium hypochlorite and bis(acetylacetonate) beryllium to expand the pores, add the surface The active agent dodecyl dimethyl hydroxyethyl ammonium chloride is subjected to 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 a hydrothermal reaction kettle, and the precursor of the catalytic activity auxiliary agent tris(hexafluoroacetylacetonate)yttrium(III) dihydrate, samarium acetylacetonate, tris(4,4,4‑trifluoro‑1‑(2‑thiophene)‑1,3‑butanedione) europium, deca Holmium water oxalate rare earth metal organic compound, catalytic active center component precursor common transition metal organic compound pyruvate isonicotinoyl hydrazone vanadium, nickel citrate, copper glutamate and noble metal compound tetrachloro iridium dihydrate, in emulsifier N‑ Under the action of dodecyldimethyl-N'-trimethyl-2-hydroxypropyl diammonium chloride, the hydrothermal reaction is carried out. After the reaction product is dried to remove moisture, it is burned in a muffle furnace at a certain temperature A solid catalyst for ozone heterogeneous oxidation is obtained.

Description

technical field [0001] The invention relates to a preparation method of an ozone heterogeneous oxidation solid catalyst, belonging to the technical field of environmental protection and chemical catalysts. Background technique [0002] Ozone oxidation technology utilizes the characteristics of strong ozone oxidation ability, 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. Low ozone utilization leads to high operating costs for water treatment. At the same time, organic pollutants are removed. The low rate and easy to cause secondary pollution of water body limit its application; the ozone heterogeneous catalytic oxidation technology has the advantages of easy separation, recovery and reus...

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 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