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Synthesis of dimethyl silicane hydroxide

A technology of dimethylhydrochlorosilane and methylhydrogendichlorosilane, which is applied in the field of synthesizing dimethylhydrochlorosilane, can solve problems such as low yield of dimethylhydrochlorosilane and difficulty in recycling catalysts, and achieve low cost effect

Inactive Publication Date: 2007-02-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the yield of product dimethylhydrochlorosilane is low and the recycling of catalyst is difficult

Method used

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  • Synthesis of dimethyl silicane hydroxide

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Experimental program
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Effect test

Embodiment 1

[0018] Methylhydrogendichlorosilane was filled with solid-supported AlCl 3 Synthesis of methyl dihydrochlorosilane by self-disproportionation reaction in the fixed bed reactor (I) of the catalyst, the temperature of the reactor (I) is 300°C, and the liquid volume space velocity of methyl hydrogen dichlorosilane is 1.5h -1 , the outlet product of the reactor (I) is separated by freezing methyl dihydrochlorosilane; then the collected methyl dihydrochlorosilane and trimethylchlorosilane are mixed with a molar ratio of 0.8:1 and then mixed for 1.5h -1 The liquid volumetric space velocity is filled with solid-supported AlCl 3 A redistribution reaction occurs in the fixed bed reactor (II) of the catalyst to synthesize dimethylhydrochlorosilane, and the temperature of the reactor (II) is 280°C; the reaction ends after the reactants are fed, and the collected products are quantitatively analyzed by gas chromatography . Among them, 21.9% of trimethylchlorosilane, 18.4% of methyldihyd...

Embodiment 2

[0020] Methylhydrogendichlorosilane was filled with solid-supported AlCl 3 Synthesis of methyl dihydrochlorosilane by self-disproportionation reaction in the fixed bed reactor (I) of the catalyst, the temperature of the reactor (I) is 300°C, and the liquid volume space velocity of methyl hydrogen dichlorosilane is 1.5h -1 , the reactor (I) outlet product is separated by freezing methyl dihydrochlorosilane; then the collected methyl dihydrochlorosilane and trimethyl chlorosilane are mixed with a molar ratio of 1: 1 and then used for 3.0h -1 The liquid volumetric space velocity is filled with solid-supported AlCl 3 A redistribution reaction occurs in the fixed bed reactor (II) of the catalyst to synthesize dimethylhydrochlorosilane, and the temperature of the reactor (II) is 280°C; the reaction ends after the reactants are fed, and the collected products are quantitatively analyzed by gas chromatography . Among them, trimethylchlorosilane is 41.9%, methyldioxychlorosilane is 1...

Embodiment 3

[0022] Methylhydrogendichlorosilane was filled with solid-supported AlCl 3 Synthesis of methyl dihydrochlorosilane by self-disproportionation reaction in the fixed bed reactor (I) of the catalyst, the temperature of the reactor (I) is 300°C, and the liquid volume space velocity of methyl hydrogen dichlorosilane is 1.5h -1 , the outlet product of the reactor (I) is separated by freezing methyl dihydrochlorosilane; then the collected methyl dihydrochlorosilane and trimethylchlorosilane are mixed with a molar ratio of 0.8:1 and then mixed for 1.5h -1 The liquid volumetric space velocity is filled with solid-supported AlCl 3A redistribution reaction occurs in the fixed bed reactor (II) of the catalyst to synthesize dimethylhydrochlorosilane. The temperature of the reactor (II) is 320°C. After the reactants are fed, the reaction is ended, and the collected products are quantitatively analyzed by gas chromatography. . Among them, 16.3% of trimethylchlorosilane, 12.9% of methyldihy...

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Abstract

Synthesis of dimethyl hydrogen-chlorine silicane is carried out by taking methyl-hydrogen-dichloro-silicane and trimethyl chlorine silicane as materials, self-disproportionation reacting for methyl-hydrogen-dichloro-silicane in reactor (I) of fixed bed with solid carrier AlCl3 catalyst filling, synthesizing methyl dihydrochloride silicane, mixing the collected methyl dihydrochloride silicane with trimethyl chlorine silicane with mol ratio 0.5:1-1:1, re-distributing reacting in reactor (II) of fixed bed with solid carrier AlCl3 catalyst filling by liquid volume space velocity, and synthesizing dimethyl hydrogen-chlorine silicane at 250-400deg.C in reactor (I) and reactor ( II ), liquid space velocity of reactant in reactor (II) is 0.5-5.0h-1. Its advantages include low cost, simple production of catalyst, easy separation, and continuous production.

Description

technical field [0001] The invention relates to the research field of special organosilicon monomer synthesis technology, in particular to a method for synthesizing dimethylhydrochlorosilane. Background technique [0002] Dimethylhydrochlorosilane [molecular formula (CH 3 ) 2 SiHCl], as a monofunctional chlorosilane, is a colorless liquid at room temperature, with a boiling point of 36°C, a relative density of 0.868 at 20°C, and a refractive index of 1.383. Due to its terminal group (CH 3 ) 2 Because H has active hydrogen, it has unique conditions in development and utilization. Using the Si-H bond, it can be added to C=C on small molecules or polymers, and its Si-C bond can be combined with silicon Oxygen chains are connected, making it a bridge-building agent for the combination of polysiloxane and organic polymers. In addition, dimethyl hydrochlorosilane can also be used to prepare various carbon-functional silanes or long-chain alkyl silanes and active silicone oils...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/12
Inventor 范宏谭军李伯耿卜志扬
Owner ZHEJIANG UNIV