Catalyst for purifying dimethyl dichlorosilane as well as preparation method and application of catalyst

A technology of dimethyldichlorosilane and catalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problem of containing many by-products and affecting downstream Products and other issues, to achieve good dispersion, increase the reaction rate, improve the quality of the effect

Pending Publication Date: 2022-01-07
北京国化新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defects that dimethyldichlorosilane cannot be deeply purified in the prior art, and contains many by-products, which affects downstream products, thereby providing a method for purifying dimethyldichlorosilane Catalyst of dichlorosilane and its preparation method and application

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  • Catalyst for purifying dimethyl dichlorosilane as well as preparation method and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This comparative example provides a kind of catalyst that is used for purifying dimethyl dichlorosilane, and its raw material comprises TEOS, Pd(NO 3 ) 2 2H 2 O, AlCl 3 and H 2 O.

[0042] The preparation method of above-mentioned catalyst comprises the following steps,

[0043] At room temperature, the AlCl 3 , water and Pd(NO 3 ) 2 ·6H 2O Mix according to the above ratio and stir for 30 minutes. After the powder is completely dissolved, add TEOS and continue stirring for 20 minutes, then add triethylamine to adjust the pH to 9-10, continue stirring for 2 hours, then transfer the solution to a hydrothermal kettle, and crystallize at 200°C 48h;

[0044] Then the obtained crystallized product was cooled and filtered, washed three times with deionized water and ethanol, and dried at 100°C for 12 hours to obtain the original powder of molecular sieve loaded with palladium; then the original powder of molecular sieve was placed in a muffle furnace to Heat up to 60...

Embodiment 2

[0046] This embodiment provides a catalyst for purifying dimethyldichlorosilane, the raw material of which comprises orthoethyl silicate (TEOS), Pd(NO 3 ) 2 2H 2 O, Zn(NO 3 ) 2 ·6H 2 O, AlCl 3 and H 2 O.

[0047] The preparation method of above-mentioned catalyst comprises the following steps,

[0048] At room temperature, the AlCl 3 , deionized water, Pd(NO 3 ) 2 2H 2 O and Zn(NO 3 ) 2 ·6H 2 O mixed according to the above ratio, stirred for 30min, until the powder was completely dissolved, added TEOS and continued to stir for 20min, then added triethylamine (TEA) to adjust the pH to 9-10, continued to stir for 2h, then transferred the solution to a hydrothermal kettle, at 200 Crystallization at ℃ for 48h;

[0049] Then the obtained crystallized product was cooled and filtered, washed three times with deionized water and ethanol, and dried at 100°C for 12 hours to obtain the original powder of molecular sieve loaded with palladium; then the original powder of mo...

Embodiment 3

[0051] This embodiment provides a catalyst for purifying dimethyldichlorosilane, the raw material of which comprises TEOS, Pd(NO 3 ) 2 2H 2 O, Zn(NO 3 ) 2 ·6H 2 O, AlCl 3 and H 2 O.

[0052] The preparation method of above-mentioned catalyst comprises the following steps,

[0053] At room temperature, the AlCl 3 , deionized water, Pd(NO 3 ) 2 2H 2 O and Zn(NO 3 ) 2 ·6H 2 O mixed according to the above ratio, stirred for 30min, until the powder was completely dissolved, added TEOS and continued to stir for 20min, then added triethylamine (TEA) to adjust the pH to 9-10, continued to stir for 2h, then transferred the solution to a hydrothermal kettle, at 200 Crystallization at ℃ for 48h;

[0054] Then the obtained crystallized product was cooled and filtered, washed three times with deionized water and ethanol, and dried at 100°C for 12 hours to obtain the original powder of molecular sieve loaded with palladium; then the original powder of molecular sieve was plac...

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Abstract

The invention belongs to the technical field of dimethyl dichlorosilane purification treatment, and particularly relates to a catalyst for purifying dimethyl dichlorosilane as well as a preparation method and application of the catalyst. The raw materials of the catalyst comprise a palladium-containing compound, an aluminum-containing precursor and a silicon-containing precursor. The catalyst can significantly reduce bond breaking activation energy of silicon-hydrogen bonds, silicon-silicon bonds, carbon-chlorine bonds, carbon-carbon unsaturated silicon-methyl bonds and silicon-chlorine bonds, so that difficult-to-separate substances are converted into easy-to-separate substances. Substances such as chlorine-carbon compounds, unsaturated hydrocarbons and ethylhydrodichlorosilane generate products with higher boiling points than dimethyldichlorosilane, and the products are easy to remove in the subsequent rectification link, so that the purity of the finished dimethyldichlorosilane can be obviously improved, and the influence of impurities in the dimethyldichlorosilane on the quality of downstream products is reduced. The catalyst provided by the invention is good in dispersity, high in activity, high in repeated utilization rate and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of dimethyldichlorosilane purification treatment, and in particular relates to a catalyst for purifying dimethyldichlorosilane, a preparation method and application thereof. Background technique [0002] In recent years, my country's organic silicon industry has developed rapidly, and the market demand has increased every year. The total output of organic silicon monomers has leapt to the first in the world, and the demand for high-quality organic silicon monomers is also increasing. With the continuous expansion of the production scale of organic silicon monomers in China and the continuous improvement of the requirements for sustainable development, the amount of by-products produced by the production of organic silicon monomers is also increasing. The amount of by-products that are difficult to handle has also increased. On the one hand, these by-products are very easy to react with moisture in the air to...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/60B01D53/86B01D53/72B01J35/10
CPCB01J23/44B01J23/60B01D53/8668B01J35/61
Inventor 白洪强周建军王盛柳
Owner 北京国化新材料技术研究院有限公司
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