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Immobilized catalyst as well as preparation method, use method and application thereof

A technology of immobilized catalysts and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of low yield of dimethyldichlorosilane, harsh process conditions, and low activity, and achieve Improves activity and selectivity, high yield, suppresses sublimation

Active Publication Date: 2022-08-05
QUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1) AlCl 3 Low activity, easy sublimation (about 180°C under normal pressure) loss, blockage of pipeline valves, need to operate under high temperature and high pressure, harsh process conditions, high energy consumption;
[0008] 2) The yield of dimethyldichlorosilane is low

Method used

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  • Immobilized catalyst as well as preparation method, use method and application thereof

Examples

Experimental program
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preparation example Construction

[0038] Embodiments 1-7 are the preparation methods of catalysts with different concentrations, and the preparation method includes the following steps: P1, AlCl 3 and co-catalyst fully dissolved in absolute ethanol to prepare a solution; P2, slowly pour the solution into the fully dried mesoporous aza-carbon material, stir continuously, and impregnate; P3, pour the mesoporous nitrogen impregnated in step P2 The heterocarbon material is dried to make a catalyst immobilized on the mesoporous aza-carbon material.

[0039] Embodiments 8-14 are experiments for catalytic cracking of organosilicon high boilers using the catalysts prepared in Examples 1-7, including the following steps: S1, performing vacuum distillation on organosilicon high boilers to remove solid impurities to obtain pretreated high boilers. Boiler; S2, adding the organosilicon high boiler after impurity removal into the cracking reactor, and then adding a solid-supported catalyst; S3, feeding hydrogen chloride gas...

Embodiment 15

[0040] Example 15 is a catalyst recycling performance experiment, the catalyst with the best catalytic performance is recovered, and its recycling performance is tested under the same reaction conditions as in Example 8.

Embodiment 1

[0042] 0.6g of AlCl 3 And 0.06g of cerium chloride was dissolved in 20ml of absolute ethanol to prepare an impregnation solution, slowly poured into the fully dried 10g mesoporous azacarbon carrier, stirred continuously, and soaked at room temperature for 2 hours. The ethanol was slowly evaporated to dryness in a water bath, and then dried in an oven at 60° C. for use. The catalyst was labeled as aluminum trichloride-cerium chloride / mesoporous azacarbon (6:0.6:100).

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Abstract

The invention discloses an immobilized catalyst as well as a preparation method, a use method and application thereof, and belongs to the technical field of catalysts. The invention relates to an immobilized catalyst, which takes a mesoporous nitrogen-doped carbon material as a carrier, and the carrier is loaded with AlCl3 and a cocatalyst. The immobilized catalyst is applied as an organic silicon high-boiling residue cracking catalyst. The invention discloses a preparation method of an immobilized catalyst. The preparation method comprises the following steps: P1, fully dissolving AlCl3 and a cocatalyst in absolute ethyl alcohol to prepare a solution; p2, slowly pouring the solution into a fully dried mesoporous nitrogen-doped carbon material, and continuously stirring and dipping; and P3, drying the impregnated mesoporous nitrogen-doped carbon material in the step P2 to prepare the catalyst immobilized on the mesoporous nitrogen-doped carbon material. The catalyst can be used as a catalyst for preparing dimethyldichlorosilane through cracking of the organic silicon high-boiling residues, the reaction condition is mild, the reaction does not need to be carried out under the conditions of high temperature and high pressure, a better conversion rate can be obtained through cracking of the organic silicon high-boiling residues, and a better yield of dimethyldichlorosilane can be obtained.

Description

technical field [0001] The present invention relates to the technical field of catalysts, and more particularly, to a solid-supported catalyst and its preparation method, use method and application. Background technique [0002] Silicone high boilers are highly corrosive and flammable. They are rarely used in the silicone industry chain and have no industrial value. With the rapid expansion of my country's silicone production capacity and the improvement of national environmental protection requirements, proper and reasonable The use of high boilers to improve their industrial value has become one of the focuses of major monomer manufacturers. [0003] Catalytic cracking is an effective treatment method for high boilers. At present, a series of catalysts with different properties and operating conditions have been developed on the market, such as Lewis acids, organic amines, palladium-phosphorus complexes and molecular sieves. Among them, AlCl 3 It is a very effective organo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C07F7/12
CPCB01J27/24C07F7/121B01J35/60Y02P20/584
Inventor 李兵兵雷宏柳青媛谢建伟郑云峰胡家啟展喜兵陈道伟
Owner QUZHOU UNIV