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Continuous production method of propyl trialkoxysilane

A technology of propyltrialkoxysilane and propyltrichlorosilane, which is applied in the field of chemical synthesis, can solve the problems of many production by-products, poor product quality, and low product yield, and achieve low labor intensity, thorough reaction, The effect of high purity

Inactive Publication Date: 2009-02-11
淄博市临淄齐泉工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this product is mainly a laboratory product, and the reaction method is batch-type kettle reaction. The disadvantage is that the labor intensity is high, and the reaction process has many side reactions, resulting in many by-products and poor product quality, and the product yield is low, and the production scale is small. The pressure of environmental protection has become a bottleneck restricting product promotion and market application development

Method used

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  • Continuous production method of propyl trialkoxysilane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the usual raw material batching requirements, the reaction raw materials are propyltrichlorosilane and methanol with a total molar ratio of 1:4. Put propyltrichlorosilane and methanol into a pre-reactor (pre-esterification tank) through the insertion tube according to the molar ratio of 1:2.4. At normal temperature, a preliminary reaction is carried out in the pre-esterification tank. The flow enters the tower reactor (esterification tower), and the remaining amount of methanol is vaporized and heated to a temperature of 150°C through two vaporization tanks in sequence. The gaseous alcohol vapor enters from the lower part of the esterification tower. After contacting the pre-esterification solution entering the reactor, the reaction is continued until complete, and the hydrogen chloride generated by the reaction is removed, and the vacuum degree of the reaction system is maintained at 0.02MPa.

[0014] The hydrogen chloride produced by the reaction is absor...

Embodiment 2

[0016] Ratio of reaction raw materials: the total molar ratio of propyltrichlorosilane and methanol is 1:4;

[0017] The add-on of methyl alcohol is 65% in the preliminary reaction;

[0018] The remaining amount of methanol is vaporized and heated to a temperature of 145°C;

[0019] The vacuum degree of the reaction system was kept at 0.015MPa.

[0020] Others are with embodiment 1.

Embodiment 3

[0022] Ratio of reaction raw materials: the total molar ratio of propyltrichlorosilane and methanol is 1: 3.5;

[0023] The add-on of methyl alcohol is 60% in the preliminary reaction;

[0024] The remaining amount of methanol is vaporized and heated to a temperature of 155°C;

[0025] The vacuum degree of the reaction system was kept at 0.02MPa.

[0026] Others are with embodiment 1.

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Abstract

The invention relates to a continuous production method for triethoxypropylsilane, which pertains to the technical field of chemical synthesis, is obtained from the reaction of propyl trichlorosilane and lower aliphatic alcohol and is characterized in that preliminary reaction is carried out in a pre-reactor of the propyl trichlorosilane and the lower aliphatic alcohol; after the reaction, mixed liquid overflows into a tower reactor for esterification reaction; after rectification, a triethoxypropylsilane product is obtained; in the reaction, the lower aliphatic alcohol is added by two sections, wherein, 50 percent to 75 percent of the lower aliphatic alcohol in the preliminary reaction while the rest part thereof enters from the lower part of the tower reactor after vaporization and heating; the vaporized lower aliphatic alcohol continues to react to be complete after being in contact with pre-reaction liquid entering from the pre-reactor during a rising process. The continuous production method has low labor intensity, can obtain products with high purity, good quality and high yield, and is convenient for enlarging production scale and is beneficial to environmental protection.

Description

technical field [0001] The invention relates to a continuous production method of propyltrialkoxysilane, which belongs to the technical field of chemical synthesis. Background technique [0002] Propyltrialkoxysilane, mainly used as a silane coupling agent product, is an important basic raw material for processing sol-gel, which adds an appropriate amount of organic properties to the polysiloxane network. At present, this product is mainly a laboratory product, and the reaction method is batch-type kettle reaction. The disadvantage is that the labor intensity is high, the reaction process has many side reactions, resulting in many production by-products and poor product quality, and the product yield is low and the production scale is small. The pressure of environmental protection has become a bottleneck restricting product promotion and market application development. Contents of the invention [0003] The object of the present invention is to provide a continuous produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18
Inventor 乌洪涛齐锋国许钧峰崔安平
Owner 淄博市临淄齐泉工贸有限公司