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Metal salt ceramic composite material as well as preparation method and application thereof

A technology of ceramic composite materials and metal salts, applied in chemical instruments and methods, catalyst activation/preparation, condensation between hydrocarbons and non-hydrocarbons to produce hydrocarbons, etc., can solve the problems of low selectivity and catalytic efficiency

Pending Publication Date: 2022-08-02
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the Friedel-Crafts reaction catalysts are mostly catalysts loaded with aluminum, iron or indium elements, and the selectivity and catalytic efficiency are relatively low.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0018] The invention provides a preparation method of a metal salt ceramic composite material, comprising the following steps:

[0019] The ceramic particles are dipped into a mixed solution containing aluminum salt, iron salt and indium salt, and the obtained impregnation system is dried to obtain a metal salt ceramic composite material precursor; the mass ratio of the aluminum salt to the iron salt is 1.5-7:1 ; The mass ratio of the iron salt to the indium salt is 0.5 to 3:1;

[0020] The metal salt ceramic composite material precursor is calcined to obtain the metal salt ceramic composite material.

[0021] In the present invention, ceramic particles are impregnated into a mixed solution containing aluminum salt, iron salt and indium salt, and the obtained impregnation system is dried to obtain a metal salt ceramic composite material precursor; the mass ratio of the aluminum salt to the iron salt is 1.5-7 : 1; the mass ratio of the iron salt to the indium salt is 0.5 to 3:...

Embodiment 1

[0031] Soak 500g of ceramics with a particle size of 0.1mm-0.5mm in dilute hydrochloric acid with a concentration of 0.25mol / L for 3 hours, and rinse with flowing distilled water for 2 hours;

[0032] Prepare a mixed solution containing 100g aluminum chloride, 60g ferric chloride and 40g indium trichloride;

[0033] After immersing the above-mentioned treated ceramics in the mixed solution of the above-mentioned aluminum chloride, ferric chloride and indium trichloride for 24 hours, drying the dipping system at a temperature range of 105° C. to obtain a metal salt ceramic composite material precursor ;

[0034] The metal salt ceramic composite material precursor is calcined. The calcination temperature was raised from normal temperature to 400°C at 0.2°C / min, and calcined for 36 hours to obtain the metal salt ceramic composite material.

Embodiment 2

[0036] Soak 500g of ceramics with a particle size of 0.1mm-0.5mm in dilute hydrochloric acid with a concentration of 0.25mol / L for 5 hours, and rinse with flowing distilled water for 1 hour;

[0037] A mixed solution containing 120 g of aluminum chloride, 60 g of ferric chloride and 20 g of indium trichloride was prepared.

[0038] After immersing the above-mentioned treated ceramics in the mixed solution of the above-mentioned aluminum chloride, ferric chloride and indium trichloride for 48 hours, drying the dipping system at a temperature range of 105° C. to obtain a metal salt ceramic composite material precursor .

[0039] The metal salt ceramic composite material precursor is calcined. The calcination temperature was raised from normal temperature to 600°C at 0.2°C / min, and calcined for 72 hours to obtain the metal salt ceramic composite material.

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Abstract

The invention provides a metal salt ceramic composite material as well as a preparation method and application thereof, and belongs to the technical field of catalysts. According to the preparation method, the proportion of aluminum salt, ferric salt and indium salt is adjusted, and molecules of the aluminum salt, the ferric salt and the indium salt are mutually embedded and atomic orbits are mutually hybridized through dipping and calcining. The catalytic activity to different sites in reactants is improved through mutual influence of electron densities of the three elements of aluminum, iron and indium and overlapping of part of atomic orbits, so that the conversion rate and selectivity of the Friedel-Crafts reaction are improved when the catalyst is used as a Friedel-Crafts reaction catalyst. Results of the embodiment show that the metal salt ceramic composite material prepared by the method can enable the conversion rate of raw materials in the Friedel-Crafts reaction to be 99% and the selectivity to be 95%-99%.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a metal salt ceramic composite material and a preparation method and application thereof. Background technique [0002] Since Friedel and Crafts discovered in 1877 that chlorinated hydrocarbons and aromatic compounds can undergo electrophilic substitution reactions under the action of stoichiometric Lewis acids (that is, Friedel-Crafts reaction, Friedel-Crafts reaction for short), Friedel-Crafts reaction has become One of the most important reactions of carbon-carbon bond formation in the field of organic chemistry. [0003] Currently, most of the Friedel-Crafts reaction catalysts are supported with aluminum, iron or indium elements, which have relatively low selectivity and catalytic efficiency. For example, in the Chinese Patent Application No. 202011006234.9, the highest yield of the target compound in the Friedel-Crafts reaction of the combined catalyst of ferr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/825B01J35/04B01J35/02B01J37/02B01J37/08C07C2/86C07C15/02B01J35/00
CPCB01J23/825B01J37/0201B01J37/088C07C2/861B01J35/50B01J35/40B01J35/56C07C15/02
Inventor 崔培哲孟凡庆徐文辉王英龙李鑫齐建光朱兆友郑忠辉贾建波孙科韩雷
Owner QINGDAO UNIV OF SCI & TECH
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