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Production method of low-viscosity silicone oil

A low-viscosity silicone oil and production method technology, applied in the field of silicone oil production, can solve the problems of oil consumption, auxiliary materials and energy consumption, cost increase, high cost, etc., and achieve great economy, cost saving, and low environmental pollution Effect

Inactive Publication Date: 2016-10-26
扬州宏远新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production of organic silicon monomers from waste silicone rubber in my country generally needs to be rearranged to produce silicone oil, which will increase the consumption of oil, auxiliary materials and energy consumption, resulting in increased costs. At present, there is a method in my country that uses sulfuric acid to directly make viscous silicone oil. However, due to the high cost of waste sulfuric acid treatment, the cost is higher than the rearrangement process to make silicone oil, so the method of acid silicon oil is generally not used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Follow the steps below:

[0020] 1) Pump the silicone monomer into the reaction kettle, add 6% edible alkali to neutralize the acid inside to make it neutral;

[0021] 2) Add 0.2% activated carbon and filter;

[0022] 3) Pump the filtered oil into another reaction kettle, raise the temperature to 80°C, keep the vacuum at 0.09MPa, and add 0.2% potassium hydroxide;

[0023] 4) Then the temperature is slowly raised to 110°C, kept for 4 hours, and 0.2% phosphoric acid is added to make it neutral;

[0024] 5) Then heat up to 240°C, remove low molecular weight, and add 1% activated carbon;

[0025] 6) Lower the temperature to 80°C, adjust the viscosity to the required level, and filter through a filter press to obtain the finished product;

[0026] The above ratios are based on the mass ratio of organosilicon monomer.

Embodiment 2

[0028] Follow the steps below:

[0029] 1) Pump the silicone monomer into the reaction kettle, add 3% edible alkali to neutralize the acid inside to make it neutral;

[0030] 2) Add 0.4% activated carbon and filter;

[0031] 3) Pump the filtered oil into another reaction kettle, raise the temperature to 70°C, keep the vacuum at 0.1MPa, and add 0.3% potassium hydroxide;

[0032] 4) Then the temperature was slowly raised to 100°C, kept for 3 hours, and 0.3% phosphoric acid was added to make it neutral;

[0033] 5) Then heat up to 220°C, remove low molecular weight, and add 1.2% activated carbon;

[0034] 6) Lower the temperature to 75°C, adjust the viscosity to the required level, and filter through a filter press to obtain the finished product;

[0035] The above ratios are based on the mass ratio of organosilicon monomer.

Embodiment 3

[0037] Follow the steps below:

[0038] 1) Pump the silicone monomer into the reaction kettle, add 3% edible alkali to neutralize the acid inside to make it neutral;

[0039] 2) Add 0.5% activated carbon and filter;

[0040] 3) Pump the filtered oil into another reaction kettle, raise the temperature to 90°C, keep the vacuum at 0.09MPa, and add 0.15% potassium hydroxide;

[0041] 4) Then the temperature was slowly raised to 120°C, kept for 4.5 hours, and 0.1% phosphoric acid was added to make it neutral;

[0042] 5) Then raise the temperature to 260°C, remove the low molecular weight, and add 0.8% activated carbon;

[0043] 6) Lower the temperature to 90°C, adjust the viscosity to the required level, and filter through a filter press to obtain the finished product;

[0044] The above ratios are based on the mass ratio of organosilicon monomer.

[0045] The invention is suitable for the production method of low-viscosity silicone oil with viscosity less than 500CS.

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PUM

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Abstract

The invention relates to a production method of low-viscosity silicone oil. The method comprises the following steps: 1) drawing an organosilicon monomer into a reaction kettle, and adding 3-7% of edible alkali to neutralize the acid until the system is neutral; 2) adding 0.2-0.5% of activated carbon, and filtering; 3) drawing the filtered oil into another reaction kettle, heating to 70-90 DEG C, keeping the vacuum degree at 0.08-0.1 MPa, and adding 0.1-0.3% of potassium hydroxide; 4) slowly heating to 100-120 DEG C, keeping for 3-5 hours, and adding 0.1-0.3% of phosphoric acid until the system is neutral; 5) heating to 220-260 DEG C, removing low molecules, and adding 0.8-1.2% of activated carbon; and 6) cooling to 70-90 DEG C, regulating the viscosity to the requirement, and carrying out pressure filtration by a filter press to obtain the finished product, wherein the proportion is the mass percent on the basis of the organosilicon monomer. The production method provided by the invention has the advantages of low environmental pollution and low cost, and has the meaning and function in the aspects of enhancing national related products, industrial technological progress and the like.

Description

technical field [0001] The invention relates to a method for producing low-viscosity silicone oil, belonging to the technical field of silicone oil production. Background technique [0002] The production of organic silicon monomers from waste silicone rubber in my country generally requires rearrangement to produce silicone oil, which will increase oil consumption, auxiliary materials and energy consumption, resulting in increased costs. At present, there is a method in my country that uses sulfuric acid to directly make viscous silicone oil. However, due to the high cost of waste sulfuric acid treatment, the cost is higher than that of rearranging silicon oil, so the method of acid silicon oil is generally not used. Contents of the invention [0003] The present invention aims at the above-mentioned defects, and aims to provide a production method of low-viscosity silicone oil with little environmental pollution, low cost, and the significance and effect of improving the ...

Claims

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Application Information

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IPC IPC(8): C08G77/04C08G77/06
CPCC08G77/04C08G77/06
Inventor 赵剑王明
Owner 扬州宏远新材料股份有限公司