Production process for continuously producing high-hydrogen-content silicone oil

A high hydrogen-containing silicone oil and production process technology, applied in the field of fine chemicals, can solve the problems of high production cost, low hydrogen content, solvent pollution, etc., and achieve the effects of reducing production cost, improving yield, and reducing the number of washings

Active Publication Date: 2014-05-14
HOSHINE SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the pollution or side effects of the solvent itself in the production of the existing solvent method, the residue of the solvent in the product restricts the use of the product, and the production cost of hydrogen-containing silicone oil by the non-solvent method is high and the yield is low. , The problem of low hydrogen content

Method used

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  • Production process for continuously producing high-hydrogen-content silicone oil

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] A production process for continuous production of high hydrogen-containing silicone oil comprises the following steps:

[0024] 1) Add trimethylchlorosilane, methylhydrogendichlorosilane, dilute hydrochloric acid with a concentration of 1wt%, and low molecular weight into the hydrolysis cycle reaction system in proportion, with an average residence time of 20 minutes and a temperature of 8°C; the trimethylsilane The mass ratio of methylchlorosilane and methylhydrogendichlorosilane is 1:10, and the mass ratio of the chlorosilane mixture composed of trimethylchlorosilane and methylhydrogendichlorosilane and the concentration of 1wt% dilute hydrochloric acid is 1:30 ;

[0025] 2) The oleic acid mixture obtained through the hydrolysis reaction is separated in the oleic acid separation system, the upper layer is the hydrolyzate, and the lower layer is 16wt% dilute hydrochloric acid; the lower layer dilute acid enters the hydrolysis reaction system for recycling; the upper la...

Embodiment 2

[0028] A production process for continuous production of high hydrogen-containing silicone oil comprises the following steps:

[0029] 1) Add trimethylchlorosilane, methylhydrogendichlorosilane, dilute hydrochloric acid with a concentration of 3wt%, and low molecular weight into the hydrolysis cycle reaction system in proportion, with an average residence time of 40 minutes and a temperature of 12°C; the trimethylsilane The mass ratio of methylchlorosilane to methylhydrogendichlorosilane is 1:20, and the mass ratio of the chlorosilane mixture composed of trimethylchlorosilane and methylhydrogendichlorosilane to the concentration of 3wt% dilute hydrochloric acid is 1:40 ;

[0030] 2) The oleic acid mixture obtained through the hydrolysis reaction is separated in the oleic acid separation system, the upper layer obtains the hydrolyzate, and the lower layer obtains 20wt% dilute hydrochloric acid; the lower layer dilute acid enters the hydrolysis reaction system for recycling; the...

Embodiment 3

[0033] A production process for continuous production of high hydrogen-containing silicone oil comprises the following steps:

[0034] 1) Add trimethylchlorosilane, methylhydrogendichlorosilane, dilute hydrochloric acid with a concentration of 5wt%, and low molecular weight into the hydrolysis cycle reaction system in proportion, with an average residence time of 30 minutes and a temperature of 20°C; the trimethylsilane The mass ratio of methylchlorosilane to methylhydrogendichlorosilane is 1:30, and the mass ratio of the chlorosilane mixture composed of trimethylchlorosilane and methylhydrogendichlorosilane to concentration of 5wt% dilute hydrochloric acid is 1:80 ;

[0035] 2) The oleic acid mixture obtained through the hydrolysis reaction is separated in the oleic acid separation system. The upper layer obtains the hydrolyzate, and the lower layer obtains 22wt% dilute hydrochloric acid. The residence time of the hydrolyzate in the oleic acid separation system is 100min; the...

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Abstract

The invention discloses a production process for continuously producing high-hydrogen-content silicone oil. The production process comprises the following steps: performing hydrolysis reaction on raw materials including trimethylchlorosilane, methyldichlorosilane, diluted hydrochloric acid and low molecule, which are in proportion; separating an oil acid mixture obtained by the hydrolysis reaction, feeding a hydrolysate at the upper layer into a washing system for deacidification, feeding dilute acid at the lower layer into a hydrolysis reaction system for recycling; after the washed hydrolysate is dehydrated, feeding the dehydrated hydrolysate into a fixed bed reaction system filled with a catalyst, and performing telomeric reaction on hydrogen-containing silicone oil; performing decontaminating, low molecule removal and refining on the hydrogen-containing silicone oil subjected to the telomeric reaction to obtain the hydrogen-containing silicone oil of which the hydrogen content is 1.56-1.60wt%. The production process for the high-hydrogen-content silicone oil, provided by the invention, has the advantages of low energy consumption, high yield, low production cost, high product hydrogen content and the like.

Description

technical field [0001] The invention relates to a production method in the field of fine chemicals, in particular to a production process for continuously preparing high hydrogen-containing silicone oil. Background technique [0002] Methyl hydrogen-containing silicone oil is a colorless and transparent oily liquid with a viscosity of 10-200 mPa·S. It is one of the most important products among silicone oil varieties. Its siloxane main chain contains active group hydrogen, which has high activity and can react with many active groups. Its notable feature is its good waterproof effect. It can be cross-linked at low temperature to form a film and form a waterproof layer on the surface of the substance. It is widely used as a waterproof agent in industries such as fabrics, glass, ceramics, paper, leather, metal, and building materials, as well as an anti-yellowing agent, cross-linking agent, and silicone rubber for silicone rubber. Ink thinner, etc., the effect is very good. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/12C08G77/34
Inventor 方红承母清林董浩兰永平曹华俊胡敬辉彭金鑫谭军
Owner HOSHINE SILICON IND CO LTD
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