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Combined method for synthesizing methyl chlorosilane

A technology of methyl chlorosilane and combined method, which is applied in the field of comprehensive utilization of by-products, can solve the problems of expensive catalysts, difficult regeneration and recycling of catalysts, etc., and achieve improved bed mass transfer and heat transfer, reduced impact, and high reactivity Effect

Active Publication Date: 2005-07-06
ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 92111250.5 discloses a method for preparing methylchlorosilane by cracking methylchlorodisilane in high boilers. The reaction includes the breaking of Si-Si bonds and the formation of Si-H bonds and Si-Cl bonds. The method uses platinum, Precious metals such as palladium are used as catalysts, and the disadvantage is that the catalysts of this method are expensive
The above method requires HCl or H 2 gas source, and the catalyst is difficult to regenerate and recycle

Method used

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  • Combined method for synthesizing methyl chlorosilane
  • Combined method for synthesizing methyl chlorosilane
  • Combined method for synthesizing methyl chlorosilane

Examples

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Effect test

Embodiment 1

[0025] The charging coefficient of aluminum powder in the stirred bed reactor is 0.5, the stirred bed reaction temperature is 280°C, the stirring speed is 80r / min, the stirred bed reaction pressure is 0.3MPa, the fixed bed reactor temperature is 300°C, the fixed bed reaction pressure 0.4MPa, control the mass ratio of methyl chloride and high boilers to be 2:1, collect the liquid phase product in the condenser after reacting for 4h, adopt gas chromatography internal standard method in combination with distillation to analyze its composition; wherein CH 3 SiHCl 2 3.67%, CH 3 SiCl 3 13.83%, (CH 3 ) 2 SiCl 2 is 23.91%, (CH 3 ) 3 SiCl is 28.24%, (CH 3 ) 4 Si is 0.89%; the high boiler conversion rate is 72.6% in the whole reaction process, CH3 The Cl conversion was 79.7%.

Embodiment 2

[0027] The charging coefficient of aluminum powder in the stirred bed reactor is 0.8, the stirred bed reaction temperature is 320°C, the stirring speed is 180r / min, the stirred bed reaction pressure is 0.8MPa, the fixed bed reactor temperature is 350°C, the fixed bed reaction pressure It is 1.0MPa, and the mass ratio of methyl chloride and high boiler is controlled to be 9:1, and the liquid phase product in the condenser is collected after 4 hours of reaction, and its composition is analyzed by gas chromatography internal standard method in conjunction with distillation; wherein CH 3 SiHCl 2 1.32%, CH 3 SiCl 3 7.73%, (CH 3 ) 2 SiCl 2 is 34.81%, (CH 3 ) 3 SiCl is 38.14%, (CH 3 ) 4 Si is 1.77%; the high boiler conversion rate is 84.3% in the whole reaction process, CH 3 The Cl conversion was 52.8%.

Embodiment 3

[0029] The charging coefficient of aluminum powder in the stirred bed reactor is 0.5, the stirred bed reaction temperature is 300°C, the stirring speed is 90r / min, the stirred bed reaction pressure is 0.5MPa, the fixed bed reactor temperature is 300°C, the fixed bed reaction pressure It is 0.4MPa, the mass ratio of control methyl chloride and low boiler is 2: 1, after reacting for 4h, collect the liquid phase product in the condenser and adopt gas chromatography internal standard method to analyze its composition; wherein CH 3 SiHCl 2 19.75%, CH 3 SiCl 3 7.63%, (CH 3 ) 2 SiCl 2 is 32.56%, (CH 3 ) 3 SiCl is 27.24%, (CH 3 ) 4 Si is 1.19%; the low boiler conversion rate is 88.1% in the whole reaction process, CH 3 The Cl conversion was 71.5%.

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Abstract

The invention discloses a combined method for silicon methyl silicane synthesis. The high boiling substance, low boiling substance, or high boiling substance and low boiling substance generated in the organosilicon monomer (CH3)2SiCl2 production process are used as main raw material for gasification and reaction together with methyl chloride in a stirring bed and fixed bed combined reactor, and a methyl chlorosilane monomer of the general formula (CH3)mSiCl4-m (m is a positive integer between 1~3) is synthesized. The mass ratio of methyl chloride to the high boiling substance, low boiling substance, or high boiling substance and low boiling substance is 1~10:1. The methyl chlorosilane monomer product can be produced at a lower cost utilizing the inventive method.

Description

technical field [0001] The present invention relates to organosilicon monomers (CH 3 ) 2 SiCl 2 The field of comprehensive utilization of by-products produced in the production process. Especially related to a (CH 3 ) 2 SiCl 2 A combined method for synthesizing methylchlorosilane monomers from by-product high boilers and low boilers or high boilers and low boilers produced in the monomer production process as the main raw material. Background technique [0002] Organosilicon materials are mainly a kind of polymer compound with Si-O bond as the main chain, and organic groups are introduced as side chains on Si, which have excellent performance and unique functions. Widely used in military, aerospace, medical, chemical and other fields. Methylchlorosilane is an important raw material for the manufacture of silicone materials, and (CH 3 ) 2 SiCl 2 It is one of the most in demand. At present, it is generally used at home and abroad to produce (CH 3 ) 2 SiCl 2 . my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/12
Inventor 范宏邵月刚谭军李伯耿任不凡卜志扬詹波王雪飞
Owner ZHEJIANG UNIV