Preparation method of ozone heterogeneous oxidation solid catalyst

A heterogeneous oxidation, solid catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of poor resistance to toxicity, easy loss of catalytic activity, The problem of low catalyst adsorption can achieve strong adsorption, improve anti-toxicity and catalytic activity, and inhibit the effect of precipitation.

Inactive Publication Date: 2017-08-04
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0007] Example 1: 1.35g lithium hypochlorite, 1.65g bis(acetylacetone) beryllium, 140ml deionized water were added to a 500ml sealable reactor and stirred and mixed uniformly. The weight concentration of the aqueous solution was 2.1%. The weight ratio of lithium chlorate: bis(acetylacetone) beryllium=1:1.2; add deionized water to wash to neutrality, dry at 103°C to remove water, sieving 2.75g γ-oxidized by -200 mesh to +400 mesh standard sieve Aluminum, 3.75g barite, 4.75g basalt, 5.75g schneiderite, 6.75g brucite, 7.75g serpentinite, lithium hypochlorite and bis(acetylacetone) beryllium weight (3g): porous material The weight (31.5g)=1:10.5, heat up to 36℃, continue to stir and react for 3.2h, filter, dry at 103℃ to obtain 31g of expanded modified carrier; put into the expanded modified carrier in a 500ml ultrasonic reactor Carrier 31g, and then add 3.25g dimethyl dioctadecyl ammonium chloride in 100ml deionized water solution, the weight concentration of the aqueous solution ...

Example Embodiment

[0008] Example 2: 0.24g lithium hypochlorite, 0.36g bis(acetylacetone) beryllium, 10ml deionized water were added to a 100ml sealable reactor and stirred and mixed uniformly. The weight concentration of the aqueous solution was 5.7%. The weight ratio of lithium chlorate: bis(acetylacetone) beryllium=1:1.5; add deionized water to wash to neutrality, dry at 103°C to remove water, sieving 1.45g γ-oxidized by -200 mesh to +400 mesh standard sieve Aluminum, 1.65g barite, 1.85g basalt, 2.05g schneiderite, 2.25g brucite, 2.45g serpentinite, lithium hypochlorite and bis(acetylacetone) beryllium weight (0.6g): porous The weight of the material (11.7g)=1:19.5, the temperature is raised to 48℃, and the reaction is continued for 5.8h, filtered, and dried at 105℃ to obtain 11.5g of expanded modified carrier; put into the expanded hole in a 100ml ultrasonic reactor 11.5g of the modified carrier, and then add 2.2g of dimethyl dioctadecylammonium chloride in 26ml of deionized water. The weight...

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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, basalt, magnesite, brucite and serpentine porous materials as carriers, and the carrier is modified by lithium hypochlorite and bis(acetylacetonate) beryllium to expand pores , adding the surfactant dimethyl dioctadecyl ammonium 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), samarium acetylacetonate, tris(6,6,7,7,8,8,8‑ Heptafluoro‑2,2‑dimethyl‑3,5‑octenedione) dysprosium(III), thulium(III) trifluoromethanesulfonate rare earth organometallic compounds, precursors of catalytic active center components common transition metalorganic Compound manganese lysine, ammonium zirconium carbonate, catechol ethylenediamine tungsten complex and noble metal compound palladium dichlorotetraammine, in emulsifier 2,6‑bis(diethylaminomethyl)‑4‑nonyl The hydrothermal reaction is carried out under the action of phenol-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...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J20/20B01J20/30C02F1/78
CPCB01J23/6562B01J20/041B01J20/045B01J20/06B01J20/08B01J20/10B01J20/103B01J20/20B01J35/10B01J37/084B01J37/10B01J2220/42B01J2220/4806B01J2220/4812C02F1/725C02F1/78C02F2305/02
Inventor 朱明范耀月石小阳
Owner SICHUAN NORMAL UNIVERSITY
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