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Method for producing cyanoethylalkoxysilane by atmospheric distillation reaction

A technology of cyanoethylalkoxysilane and cyanoethyltrichlorosilane is applied in the field of producing cyanoethylalkoxysilane, and can solve the problems of inability to continuously produce for a long time, excessive use of entrainers, low production capacity and the like, Achieve the effect of large production capacity, reduced energy consumption and low acid value

Active Publication Date: 2020-12-22
江西宏柏新材料股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for producing cyanoethylalkoxysilane by atmospheric distillation reaction in order to solve the problems of excessive use of entraining agent, low production capacity and inability to produce continuously for a long time in the existing method

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  • Method for producing cyanoethylalkoxysilane by atmospheric distillation reaction

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specific Embodiment approach 1

[0017] Specific embodiment one: the device for producing cyanoethyl alkoxysilane by atmospheric distillation reaction in this embodiment, the device includes a tower kettle 1, a packed tower 2, a first storage tank 3, a second storage tank 4 and a first replacement tank Heater 5, described tower reactor 1 and packed tower 2 form tower reactor 6, the first heat exchanger 5 links to each other with tower reactor 1 and packed tower 2 respectively, and first storage tank 3 and second storage tank 4 are respectively connected with The packed towers 2 are connected, the first pump 7, the first flow meter 8 and the second heat exchanger 9 are arranged between the first storage tank 3 and the packed tower 2, and the second storage tank 4 and the packed tower 2 are arranged Two pumps 10, a second flowmeter 11 and a third heat exchanger 12, the top of the packed tower 2 is provided with a tail gas pipe 14, the tail gas pipe 14 is provided with a fourth heat exchanger 13, the tail gas pip...

specific Embodiment approach 2

[0018] Specific embodiment two: the method for the production of cyanoethylalkoxysilane by atmospheric distillation reaction in this embodiment is carried out according to the following steps:

[0019] 1. First, lay the bottom of cyanoethyl alkoxysilane on the bottom of tower reactor 6 and tank 1, and pass the entrainer into tower reactor 6 until the temperature of tower tank 1 is 220°C-240°C, of ​​which cyanoethyl alkoxysilane The mass ratio of base alkoxysilane to entrainer is 10-20:1;

[0020] Two, from the bottom of the tower reactor 6 to the tower reactor 1 of the tower reactor 6, the monohydric aliphatic alcohol is continuously passed into the tower reactor 6 at a rate of 128g / h-256g / h, from the top of the tower reactor 6 to the tower reactor 6 Continuously feed cyanoethyltrichlorosilane at a rate of 175g / h-350g / h, and react under the condition that the temperature in the atmospheric column tank 1 is 100-120°C, and during the reaction, use 5g / h- Supplement entrainer at ...

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the entrainer described in step 1 and step 2 is toluene, acetonitrile, n-hexane or cyclohexane. Others are the same as in the second embodiment.

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Abstract

The invention relates to a device and a method for producing cyanoethyl alkoxy silane by normal pressure rectification reaction, and aims to solve the problems that excessive entrainers are used, capacity is low, and continuous production cannot be performed for a long time in an existing method. The device comprises a tower kettle, a condenser, a packed tower and a first heat exchanger. The method includes the steps: bottoming the cyanoethyl alkoxy silane; leading the entrainers into a tower reactor; continuously leading in unitary fatty alcohol; continuously leading in cyanoethyl trichlorosilane; performing reaction under the condition of normal pressure; supplementing the entrainers in the reaction process to obtain the cyanoethyl alkoxy silane. The device is reasonable in process, highin product yield, low in acid value, high in capacity, simple and low in investment cost. By a rectification reaction mode, the fewest entrainers are used, the acid value is effectively reduced, thepH (potential of hydrogen) value of reaction liquid is kept 6-7, energy consumption is greatly reduced, and capacity is improved.

Description

technical field [0001] The present invention relates to a method for producing cyanoethylalkoxysilanes. Background technique [0002] Cyanoethylalkoxysilane is an important fine chemical raw material and a product with high production value. Siloxyl groups are reactive towards inorganics and organofunctional groups are reactive or compatible with organics. Therefore, when the silane coupling agent is interposed between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix can be formed. It can build a "molecular bridge" between the interface of inorganic substances and organic substances, and connect two materials with different properties together to improve the performance of composite materials and increase the bonding strength. It was first applied to glass fiber reinforced plastics, and now its use has expanded from glass fiber reinforced plastics to glass fiber surface treatment agents for glass fiber reinforce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18B01J19/00B01D3/00B01D3/32B01J4/00
CPCB01D3/009B01D3/32B01J4/001B01J4/008B01J19/00B01J19/0006C07F7/188
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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