Method for preparing methyldiphenylchlorosilane and reactor thereof

A technology of methylphenyldichlorosilane and methyldichlorosilane, which is applied in the field of preparation of methylphenyldichlorosilane, can solve the problems of reducing production costs and non-scaled continuous reactors, and achieves convenient maintenance, The effect of high yield and simple product

Active Publication Date: 2010-01-20
ZHENJIANG JIANGNAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, batch production is mainly used at home and abroad. There is no large-scale continuous reactor, and it is impossible to truly realize the large-scale production of methylphenyldichlorosilane and reduce production costs.

Method used

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  • Method for preparing methyldiphenylchlorosilane and reactor thereof
  • Method for preparing methyldiphenylchlorosilane and reactor thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown in the reactor of the present invention, an explosion-proof junction box 1, an upper connection flange 2, and a feed port 3 are installed on the top of the cylinder body 5, and the feed port 3 is welded on the bottom of the upper connection flange 2, and at the bottom of the cylinder body 5 There are temperature measuring points 4 and 10 in the upper and lower sections, and pressure measuring points 8 in the middle. There are baffles 6 and electric heating rods 7 inside the cylinder. It passes through and is welded on the baffle; the lower part of the cylinder body 5 is equipped with a discharge port 9 , a lower head 11 and a lower cleaning flange 12 .

Embodiment 2

[0029] Such as figure 2 As shown, the specific structure of a single reactor is the same as that of the reactor in Example 1, and two identical reactors are connected in parallel and in series, so as to achieve any matching of the two reactors by changing the switch of the valve to meet the requirements of the reactor. different needs in the process.

Embodiment 3

[0031] The reactor is as in Example 2. After vaporizing methylchlorosilane, chlorobenzene, and chloroform respectively, they are respectively overheated to 400°C. 100mol / h of dichlorosilane, 120mol / h of chlorobenzene, and 10mol / h of chloroform are continuously fed into the reactor, wherein the reactor is equipped with an electric heater, and the temperature of the reactor is controlled at 450°C and the pressure is at 0.5MPa , run for 100h, after the synthesis gas is condensed, the non-condensable gas (mainly hydrogen chloride, methane, hydrogen and a small amount of methyldichlorosilane) is vented, and the amount of vented air accounts for about 5% of the total feed amount. Obtain condensate 2274Kg (accounting for 95% of feed amount), rectification obtains methyl dichlorosilane, chlorobenzene, benzene, methyl trichlorosilane, methyl phenyl dichlorosilane and high boiler, methyl dichlorosilane Silane and chlorobenzene were recovered to continue the reaction, and the yield of me...

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Abstract

The invention relates to the field of organic silicon, in particular to a method for preparing methyldiphenylchlorosilane. The method is characterized in that chlorobenzene and methyl dichlorosilane are vaporized and then led into the reactor, and are thermally condensed with the participation of catalyst under the pressure of 0.2-0.8 MPa pressure and the temperature of 350-600 DEG C to obtain the methyldiphenylchlorosilane, wherein the catalyst is selected from chloroform, dichloromethane or carbon tetrachloride. The invention further relates to the reactor used for the preparation method. The selected catalyst is low in price and easy to obtain. The resultant produced by adopting the method is simple, and products and by-products are easily separated; with the invention, industrial continuous production is easily realized without generating other toxic and harmful substances or environment pollution; and the catalyst further can be recovered for reutilization.

Description

technical field [0001] The invention relates to the field of organosilicon, in particular to a method for preparing methylphenyldichlorosilane and a reactor thereof. Background technique [0002] The side group asymmetry, excellent solubility, thermal stability, chemical stability and film-forming property of polymethylphenylsiloxane are helpful for improving the performance of polysilane, especially for improving the resistance of silicone products. Thermal properties, chemical stability, radiation resistance, etc. have obvious effects. Methylphenyldichlorosilane (MePhSiCl 2 ) is an important raw material for the preparation of polymethylphenylsiloxane. It has obvious effects on improving the performance of polyorganosiloxane, especially improving the heat resistance, chemical stability and radiation resistance of silicone products. [0003] Currently MePhSiCl 2 The preparation methods mainly include: Grignard method, liquid phase or gas phase condensation method, dispr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/12B01J12/00B01J31/02
CPCY02P20/584
Inventor 朱德洪鲁兰帅祝纪才宫有圣朱恩俊
Owner ZHENJIANG JIANGNAN CHEM
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