Preparation method of propyl trimethoxy silane

A technology of propyltrimethoxysilane and propyltrichlorosilane is applied in the field of preparation of propyltrimethoxysilane to achieve the effects of sufficient reaction, stable process and realization of DCS computer control.

Inactive Publication Date: 2013-02-13
江西晨光新材料股份有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of propyltrimethoxysilane, which solves the comprehensive utilization and environmental protection problems of by-products in the industrial production of γ-chloropropyltrichlorosilane

Method used

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  • Preparation method of propyl trimethoxy silane
  • Preparation method of propyl trimethoxy silane

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Embodiment Construction

[0018] Such as figure 1 As shown, the steps include:

[0019] (1) Measure propyltrichlorosilane and methanol respectively through the flowmeter according to the mass ratio of 1.5:1. Methanol is vaporized in the evaporation tank, then passes through the heating tank, and then enters the bottom of the esterification tower. The top of the tower enters and sprays down, and the two react through countercurrent contact. The main product produced during the reaction falls to the bottom of the reactor, and the by-product HCl gas overflows from the gas overflow hole at the top of the esterification tower and passes through the falling film. The absorber absorbs and forms hydrochloric acid;

[0020] (2) Use a centrifugal pump to pump the main product at the bottom of the esterification tank to the top of the esterification tower, keep the top temperature of the esterification tower at 55°C, and while the main product is falling, the methanol gas flowing through the esterification to...

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Abstract

The invention discloses a preparation method of propyl trimethoxy silane. The method comprises the steps that propyl trichlorosilane and methanol are respectively measured through a flowmeter according to the mass ratio being 1.5 : 1; the methanol passes through a heating tank after being vaporized through a vaporizing tank, and then enters the bottom of an esterification column; the propyl trichlorosilane enters the esterification column from the top and is sprayed down; principal products at the bottom of an esterifying kettle is pumped into the top of the esterification column through a centrifugal pump; methanol gas flowing through the esterification column performs gas stripping to residual HCl in the principal products so as to take away HCl while the principal products drop down; after the principal products drop down to the bottom of the esterifying kettle, the principal products are pumped into a neutralizing kettle through a delivery pump; saturated sodium methoxide solution is dropwise added into the neutralizing kettle to be conducted to neutralizing; and propyl trimethoxy silane crude products are obtained after filtering; the propyl trimethoxy silane crude products are pumped into a rectifying tower to be rectified; and after impurities are separated, propyl trimethoxy silane finished products are obtained. The method solves the problems of the comprehensive utilization of side products in the industrial product of gamma-chloropropyl trichlorosilane, has the characteristics of high production efficiency, stable process and high quantity of production, and improves the product yield and purity, thereby realizing the continuity of the process.

Description

technical field [0001] The invention relates to a preparation method of propyltrimethoxysilane. Background technique [0002] Propyltrimethoxysilane is a kind of organoalkoxysilane. Compared with the silicone products commonly used in industry, it has a smaller application range, a single performance, and a wide range of raw material sources, so it has not aroused people's attention. Pay attention to. With the rapid development of the silicone industry, especially the increasing demand for γ-functional silane coupling agents, more and more by-products whose main component is propyltrichlorosilane appear in industrial production. Propyltrichlorosilane can be used as raw material to prepare propyltrimethoxysilane through alcoholysis reaction. Therefore, with the emergence of a large number of by-products containing propyl trichlorosilane in the industrial production of organic silicon, people began to be interested in using propyl trichlorosilane in the by-product to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18
Inventor 丁建峰葛利伟
Owner 江西晨光新材料股份有限公司
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