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Method for producing tetraalkoxysilane

A technology of tetraalkoxysilane and its manufacturing method, which is applied in the direction of silicon organic compounds, etc., to achieve the effect of excellent energy efficiency

Active Publication Date: 2019-04-23
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are advantageous in terms of energy efficiency because they do not use the above-mentioned metal silicon as a raw material. On the other hand, it is necessary to inject a relatively expensive compound, namely carbonic acid, in an amount of at least twice the molar amount relative to silicon dioxide in stoichiometric terms. Alkyl esters, economically problematic as an industrial process for tetraalkoxysilanes

Method used

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  • Method for producing tetraalkoxysilane
  • Method for producing tetraalkoxysilane
  • Method for producing tetraalkoxysilane

Examples

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Embodiment

[0106] Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, unless it deviates from the summary of this invention, it can change suitably. Therefore, the scope of the present invention should not be interpreted as being limited by the specific examples shown below.

[0107]

[0108] Add 0.18 g of silica (Fuji Silysia Chemical CARiACT Q-10), 3.0 g of methanol, and dimethylacetone as an organic dehydrating agent to a 20-mL SUS autoclave (manufactured by Nitto High Pressure Co., Ltd.) with a magnetic stirring bar. Base acetal (2,2-dimethoxypropane) 5.0g, potassium hydroxide 0.02g, under the temperature of 25 ℃, according to the pressure shown in the pressure gauge (Swagelok FST company PGI-50M-MG10) make high pressure Carbon dioxide was filled from a gas cylinder so that the inside of the kettle reached 2 MPa, and the state was maintained while stirring for 10 minutes, and sealed. Then, it heated to 242 degree...

Embodiment 2

[0110] About the reaction conditions of Example 1, except having made reaction time into 96 hours, the manufacture of tetramethoxysilane was performed by operation similar to Example 1. The yield of tetramethoxysilane based on silica was 88%. The results are shown in Table 1-1.

Embodiment 3

[0112] About the reaction conditions of Example 1, the manufacture of tetramethoxysilane was performed by operation similar to Example 1 except having made carbon dioxide pressure into 0.8 MPa. The yield of tetramethoxysilane based on silica was 27%. The results are shown in Table 1-1.

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Abstract

The object of this invention is to provide the method which can manufacture tetraalkoxysilane with energy saving and high yield. Utilizing a production method comprising a first step of reacting alcohol with carbon dioxide in the presence of a dehydrating agent and / or in a reactor equipped with dehydrating means and a second step of reacting the reaction mixture obtained in the first step with silicon oxide, Tetraalkoxysilane can be produced with energy saving and high yield.

Description

technical field [0001] This invention relates to the efficient manufacturing method of tetraalkoxysilane, More specifically, it is related with the manufacturing method of tetraalkoxysilane using carbon dioxide. Background technique [0002] Tetraalkoxysilane is used as a raw material for producing various silane compounds, organosilicone polymers, various silylation agents, colloidal silica, ceramics, and the like. [0003] As a conventionally known industrial production method of alkoxysilanes, a method is known in which natural silicon dioxide is used as a starting material, mixed with carbon, and reduced at high temperature to obtain metal silicon , and react metal silicon with chlorine to produce silicon tetrachloride, and then react it with alcohol (refer to Patent Document 1). In addition, a production method of directly reacting metal silicon and alcohol is also known (see Patent Documents 2 and 3). [0004] However, these methods must go through the metal silicon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/04
CPCC07F7/04
Inventor 深谷训久崔星集崔凖哲堀越俊雄佐藤一彦安田弘之
Owner NAT INST OF ADVANCED IND SCI & TECH