Process for preparing gamma-chloropropylmethyldimethoxysilane

A technology of chloropropylmethyldimethoxysilane and chloropropylmethyldichlorosilane, which is applied in the field of preparation technology of γ-chloropropylmethyldimethoxysilane, can solve the problem of low conversion efficiency, reaction Low efficiency, high equipment investment and other problems, to achieve the effect of high production efficiency, stable operation and low pollution

Active Publication Date: 2010-06-30
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But for a long time, the preparation of γ-chloropropylmethyldimethoxysilane is mostly intermittent reaction, and the reaction efficiency is low.
The reaction device is complex and the equipment investment is high
Because the conversion efficiency is low, the unreacted raw material impurities γ-chloropropylmethyldichlorosilane and methanol that need to be discharged are also more

Method used

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  • Process for preparing gamma-chloropropylmethyldimethoxysilane
  • Process for preparing gamma-chloropropylmethyldimethoxysilane

Examples

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Effect test

Embodiment 1

[0011] Embodiment 1, the preparation process of γ-chloropropylmethyldimethoxysilane, wherein: the bottom of the reaction tower A communicates with the inlet of the reaction kettle C, and one side of the top of the reaction tower A is provided with a first feeding port E, The other side of the top of the reaction tower A is provided with a reflux feeding port G which communicates with the bottom of the reflux tank D, and the top of the reaction tower A is provided with a steam rising port M which communicates with one end of the condenser H, and the other end of the condenser H communicates with the reflux tank The top of D is connected; the bottom of the reaction tower A is provided with a second feeding port F; the bottom of the reaction kettle C is provided with a discharge port P; the pipeline connecting the reflux tank D with the reflux feeding port G is provided with a control valve K;

[0012] Its technological process: uniformly add γ-chloropropylmethyldichlorosilane fro...

Embodiment 2

[0015] Embodiment 2, the preparation technology of γ-chloropropylmethyldimethoxysilane, wherein:

[0016] Evenly add γ-chloropropylmethyldichlorosilane at a rate of 3000g / 5h, and evenly add methanol at a rate of 1000g / 5h, and control the liquid reflux flow rate in the reflux tank D to 200g / 5h;

[0017] The reaction temperature in reaction tower A is 65-75°C, and the reaction temperature in reaction kettle C is 140-160°C; the packing layer in reaction tower A is 1-1.2 meters, and the material is glass or ceramic material. The porosity is 60-70%. All the other are with embodiment 1.

Embodiment 3

[0018] Embodiment 3, the preparation technology of gamma-chloropropylmethyldimethoxysilane, wherein:

[0019] Evenly add γ-chloropropylmethyldichlorosilane at a rate of 2500-3600g / 5h, and evenly add methanol at a rate of 900-1100g / 5h, and control the liquid reflux flow rate in the reflux tank D to 190-210g / 5h;

[0020] The reaction temperature in the reaction tower A is 65-75°C, and the reaction temperature in the reactor C is 140-160°C; the packing layer in the reaction tower A is 1-1.2 meters, and the material is glass or ceramic material. The porosity is 60-70%. All the other are with embodiment 1.

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Abstract

The invention relates to a process for preparing gamma-chloropropylmethyldimethoxysilane. The gamma-chloropropylmethyldichlorosilane is uniformly added at the speed of 3,000g/5h, the methanol is uniformly added at the speed of 1,000g/5h, and the liquid reflux flow speed in a reflux tank D is controlled to be 200g/5h; the reaction temperature in a reaction tower A is between 65 DEC and 75 DEG C, and the reaction temperature in a reaction kettle C is between 140 DEG C and 160 DEG C; a packing layer in the reaction tower A is between 1m and 1.2m, glass or ceramic material is adopted, the porosity in the packing layer is between 60 percent and 70 percent. The process is matched with needed equipment, can realize continuous production and has reasonable and compact device and stable running. Because an optimal technical parameter is matched, the yield can be as high as 98 percent, therefore, the pollution is small, and the production efficiency is high.

Description

technical field [0001] The invention relates to a preparation process of silane in the field of chemistry, in particular to a preparation process of gamma-chloropropylmethyldimethoxysilane. Background technique [0002] γ-Chloropropylmethyldichlorosilane reacts with methanol to obtain γ-chloropropylmethyldimethoxysilane. γ-Chloropropylmethyldimethoxysilane is an important intermediate that can be reacted with ethylenediamine to obtain a softener that can be used in the textile industry. [0003] But for a long time, the preparation of γ-chloropropylmethyldimethoxysilane is mostly intermittent reaction, and the reaction efficiency is low. Its reaction device is complicated, and equipment investment is high. Because the conversion efficiency is low, the unreacted raw material impurities γ-chloropropylmethyldichlorosilane and methanol that need to be discharged are also more. The greater the potential pollution to the environment. Contents of the invention [0004] The ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18
Inventor 谢云飞杨秀伟李建兵贺志江
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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