Method for preparing ozone heterogeneous oxidation solid catalysts

Abstract

The invention relates to a method for preparing ozone heterogeneous oxidation solid catalysts, and belongs to the technical field of environmental protection and chemical catalysts. The method includes carrying out pore expansion and modification on carriers which are activated carbon, carnallite, potassium feldspar, ascharite, basalt and bloedite porous mineral materials by the aid of lithium hypochlorite and bis (acetylacetone) beryllium; adding chlorinated methylacryloyl oxo-ethyl trimethylammonium into the carriers and carrying surface activation treatment on the carriers under the effects of ultrasonic waves; carrying out hydrothermal reaction on the carriers which are subjected to ultrasonic surface activation, composite mineralizers, catalytic active auxiliaries and transition metal catalytic active central components in hydrothermal reaction kettles under the effect of palmitic acid trimethylamine ethanol ester ammonium iodide which is an emulsifier; drying reaction products to remove moisture; burning the reaction products in muffle furnaces at the certain temperatures to obtain the ozone heterogeneous oxidation solid catalysts. The chlorinated methylacryloyl oxo-ethyl trimethylammonium is used as a surfactant. The composite mineralizers comprise borax and potassium sulfate, the catalytic active auxiliaries which are rare earth metal compounds comprise samarium acetylacetone, tri-[4, 4, 4-trifluoro-1-(2-thiophene)-1, 3-butanedione] europium, terbium acetate hydrate and lutetium carbonate hydrate, and the transition metal catalytic active central components comprise cobalt gluconate, L-molybdenum aspirate, catechol ethylenediamine tungsten coordination complexes and terpyridine ruthenium chloride hexahydrate.

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

Due to the wide variety of pollutants and the complex chemical composition of wastewater, it will have adverse effects on the performance of the catalyst, such as adsorption and anti-toxicity, and the catalyst will easily lose its catalytic activity.

At present, the main problems of the preparation method of ozone heterogeneous oxidation solid catalyst are small adsorption capacity, low adsorption selectivity, poor toxicity resistance of the catalyst, and easy loss of catalytic activity; development and use of multi-component porous carriers to increase the adsorption of the catalyst Capacity, enhanced adsorption selectivity, using rare earth metals, transition metals and noble metals to form multi-metal catalytic active centers to improve catalyst anti-toxicity and catalytic activity The preparation method of ozone heterogeneous oxidation solid catalyst has greater environmental benefits and higher Practical value