Preparation method for solid catalyst for ozone heterogeneous oxidization

A heterogeneous oxidation, solid catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor toxicity resistance, low catalyst adsorption, It is easy to lose catalytic activity and other problems, and achieve the effects of strong adsorption, inhibition of melting and precipitation, and improvement of anti-toxicity and catalytic activity

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

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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1:1.35g lithium hypochlorite, 1.65g bis(acetylacetonate) beryllium, 140ml deionized water, join volume and be that in the sealable reactor of 500ml, stir and mix evenly, the weight concentration of this aqueous solution is 2.1%, times Lithium chlorate: bis(acetylacetonate) beryllium weight ratio = 1:1.2; add deionized water to wash to neutral, dry at 103°C to remove moisture, and then sieve -200 mesh to +400 mesh standard sieve 2.75g γ-oxidized Weight of aluminum, 3.75g barite, 4.75g fluorite, 5.75g glauberite, 6.75g aluminum hydroxide, 7.75g lapis lazuli, lithium hypochlorite and bis(acetylacetonate)beryllium (3g): weight of porous material (31.5g)=1:10.5, heat up to 36°C, continue to stir for 3.2h, filter, dry at 103°C and obtain 31g of pore-enlarging modified carrier; put 31g of pore-enlarging modified carrier into a 500ml ultrasonic reactor , then add 3.25g dimethyl dioctadecyl ammonium chloride and be dissolved in the aqueous solution of 100ml deionized wat

Embodiment 2

[0008] Embodiment 2: 0.24g lithium hypochlorite, 0.36g bis(acetylacetonate) beryllium, 10ml deionized water, join volume and be that in the sealable reactor of 100ml, stir and mix evenly, the weight concentration of this aqueous solution is 5.7%, times Lithium chlorate: bis(acetylacetonate) beryllium weight ratio = 1:1.5; add deionized water to wash to neutral, dry at 103°C to remove moisture, and then sieve -200 mesh to +400 mesh standard sieve 1.45g gamma-oxidized Aluminum, 1.65g barite, 1.85g fluorite, 2.05g glauberite, 2.25g aluminum hydroxide, 2.45g lapis lazuli, lithium hypochlorite and bis(acetylacetonate)beryllium weight (0.6g): Porous material Weight (11.7g) = 1:19.5, heat up to 48°C, continue to stir for 5.8h, filter, dry at 105°C and obtain 11.5g of pore-expanding modified carrier; put into 100ml ultrasonic reactor Carrier 11.5g, then add 2.2g dimethyl dioctadecyl ammonium chloride and dissolve in 26ml deionized water aqueous solution, the weight concentration of this

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Abstract

The invention relates to a preparation method for a solid catalyst for ozone heterogeneous oxidization and belongs to the technical field of an environment-friendly and chemical catalyst. The preparation method comprises the following steps: taking gamma-aluminum oxide, barite, fluorite, glauberite, aluminum hydroxide and celestite as a carrier; modifying the carrier by broaching with lithium hypochlorite and bis(acetylacetone) beryllium, and then adding surfactant dimethyl dimethylammonium chloride and performing surface activating treatment under the effect of ultrasonic wave; performing hydrothermal reaction on the carrier, a compound mineralizer including borax and potassium sulphate, catalytic activated assistant precursors, including 4(2, 2, 6, 6, 6-tetramethyl-3, 5-heptanedione) cerium (IV), samarium 2,4-pentanedionate hydrate, terbium acetate hydrate and thulium trifluoromethane sulfonate (III) and catalytic active core component precursors, including manganese lysine, L-aspartic acid molybdenum complex and iridium tetrachloride and dichlorodiamminoplatinum in a hydrothermal reaction kettle under the effect of N-dodecyl dimethyl-N'-trimethyl-2-hydroxypropyl ammonium dichloride used as an emulsifier; drying and dewatering the reaction product; burning in a muffle furnace under a certain temperature, thereby acquiring the solid catalyst for ozone heterogeneous oxidization.

Description

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Claims

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Application Information

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Owner SICHUAN NORMAL UNIVERSITY
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