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Preparation method of long-chain alkyl trialkoxysilane

A technology of long-chain alkyltrialkoxysilane and trialkoxyhydrogensilane, which is applied in the field of preparation of long-chain alkyltrialkoxysilane, and can solve the problems of low production efficiency, corrosion of production equipment, and long production cycle and other issues to achieve the effect of reducing equipment requirements, reducing environmental pressure, and shortening the production cycle

Active Publication Date: 2019-05-31
JINGZHOU JIANGHAN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of long-chain alkyl trialkoxysilane by route ① has the disadvantages of long production cycle so that the production efficiency is not high, and a large amount of HCL produced in the reaction process is easy to cause corrosion to the production device, and has relatively high requirements for the device; Alkyl trialkoxysilane has a simple method and a short production period, but the conversion rate of most long-chain olefins reacting with trialkoxysilane under this condition is not high, so that the preparation of long-chain alkenes by this route The production efficiency of alkoxysilane is not high, and the recovered long-chain olefins are difficult to reuse due to their low isomerization activity, resulting in a large amount of waste

Method used

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  • Preparation method of long-chain alkyl trialkoxysilane

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Experimental program
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Effect test

Embodiment 1

[0022] Add 224.4g (1mol) of 1-hexadecene into a 1L pressure reactor, then blow dry nitrogen into the kettle for 1min, then add 171.6g (1.4mol) of trimethoxyhydrogensilane and 2.42g ( 0.02mol) N,N-dimethylaniline, add 40ul chloroplatinic acid / isopropanol solution with a concentration of 0.1mol / L to the reaction kettle with a micro injector, start stirring, and heat the system temperature to 100°C, Control the pressure in the reactor to 0.3Mpa, and keep this condition to react for 2h. The added crude product was distilled to obtain 329.1 g of hexadecyltrimethoxysilane with a content of 97.0%, and the product yield was 92.0%.

Embodiment example 2

[0024] Add 224.4g (1mol) of 1-hexadecene into a 1L pressure reactor, then blow dry nitrogen into the kettle for 1min, then add 171.6g (1.4mol) of trimethoxyhydrogensilane and 2.42g ( 0.02mol) N,N-dimethylaniline, add 40ul of chloroplatinic acid / isopropanol solution with a concentration of 0.1mol / L into the reaction kettle with a micro injector, start stirring, and heat the system temperature to 110°C, Control the pressure in the reactor to 0.45Mpa, and keep this condition to react for 2h. The added crude product was distilled to obtain 338.0 g of hexadecyltrimethoxysilane with a content of 97.3%, and the product yield was 94.5%.

Embodiment example 3

[0026] Add 224.4g (1mol) of 1-hexadecene into a 1L pressure reactor, then blow dry nitrogen into the kettle for 1min, then add 171.6g (1.4mol) of trimethoxyhydrogensilane and 2.42g ( 0.02mol) N,N-dimethylaniline, add 40ul chloroplatinic acid / isopropanol solution with a concentration of 0.1mol / L into the reaction kettle with a micro injector, start stirring, and heat the system temperature to 120°C, Control the pressure in the reactor to 0.6Mpa, and keep this condition to react for 2h. The crude product after addition was distilled to obtain 347 g of hexadecyltrimethoxysilane with a content of 97.0%, and the product yield was 97.0%.

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Abstract

The invention relates to a preparation method of long-chain alkyl trialkoxysilane, and belongs to the technical field of fine chemical industry. According to the preparation method, under a certain pressure condition, long-chain olefin and trialkoxyhydrosilane are subjected to addition reaction to form the long-chain alkyl trialkoxysilane under the action of a catalyst and an auxiliary agent; andthe long chain alkyltrialkoxysilane is prepared by the method of the invention. The preparation method is simple to operate, short in production period and high in efficiency, and generation of corrosive HCL is avoided in a reaction process, requirements to equipment are reduced, meanwhile, pressure to the environment is also reduced, the preparation method is safe and environmentally friendly, meanwhile, if the method is used for preparing the long-chain alkyl trialkoxysilane, generated waste materials are less, thus, aftertreatment difficulty is reduced, the cost is also reduced, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of long-chain alkyltrialkoxysilane, which belongs to the technical field of fine chemicals. Background technique [0002] Introducing long-chain alkyl modifying groups into silicone molecules can endow silicone products with new properties. Long-chain alkyl trialkoxysilane coupling agent can be used as coating waterproof additive, durable and anti-fouling building hydrophobic agent, daily chemical additive, release agent for plastic and rubber products, fabric finishing agent (use The fabric is smooth and the wool feels strong), etc. [0003] Regarding long chain alkyltrialkoxysilanes (where the long chain alkyl includes C 8 ~C 20 There are many related literatures on the synthesis of saturated long-chain alkyl groups, alkoxy groups including short-chain alkoxy groups such as methoxy, ethoxy, propoxy, etc., and the following two routes are basically used in these literatures to prepare long-chain alkane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18
Inventor 陈其王欣阮少阳甘俊甘书官陈圣云
Owner JINGZHOU JIANGHAN FINE CHEM
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