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A kind of preparation method of hydrogen-containing silicone oil

A technology of hydrogen-containing silicon and diatomaceous earth is applied in the field of preparation of hydrogen-containing silicone oil, which can solve the problems of strong irritation of post-treatment, increased technological difficulty, and a large amount of solid residues, etc. The effect of increasing interlayer spacing and lipophilicity

Active Publication Date: 2022-02-22
烟台开发区金宏化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Concentrated sulfuric acid is used as a catalyst in the preparation of hydrogen-containing silicone oil, which can increase the reaction rate. However, since concentrated sulfuric acid is a highly corrosive and strong mineral acid, the risk of operation is relatively high, the purchase is difficult, and its post-treatment is very irritating. , will cause a large amount of solid residue, increasing the difficulty of the process

Method used

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  • A kind of preparation method of hydrogen-containing silicone oil

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preparation example 1

[0030] Preparation Example 1 of Modified Activated Clay Catalyst: ① Take 100kg of water, add 12.5kg of phosphotungstic acid, and stir evenly to obtain a phosphotungstic acid solution; ②Add 35kg of activated clay to the phosphotungstic acid solution, Stir at a speed of 150r / min for 2 hours to obtain a suspension of activated clay; ③ decompress the suspension of activated clay to -0.09MPa and maintain it for 35min to obtain prefabricated activated clay. After washing the prefabricated activated clay with water, place it in Calcined at 165°C for 5 hours to obtain a modified and activated clay catalyst.

preparation example 2

[0031] Preparation example 2 of modified activated clay catalyst: ①Take 100kg of water, add 10kg of phosphotungstic acid, stir evenly to obtain a phosphotungstic acid solution; ②Add 30kg of activated clay to the phosphotungstic acid solution, , stirred at a speed of 100r / min for 1h to obtain an activated clay suspension; ③ after depressurizing the activated clay suspension to -0.09MPa, keep it for 30min to obtain prefabricated activated clay, wash the prefabricated activated clay with water, and place it Calcined at 160°C for 4 hours to obtain a modified and activated clay catalyst.

preparation example 3

[0032] Preparation example 3 of modified activated clay catalyst: ① Take 100kg of water, add 15kg of phosphotungstic acid, stir evenly to obtain a phosphotungstic acid solution; ② add 40kg of activated clay to the phosphotungstic acid solution, at 200r / min speed, stirring for 3h, to obtain activated clay suspension; ③ after the activated clay suspension was decompressed to -0.09MPa, maintained for 40min, to obtain prefabricated activated clay, after prefabricated activated clay was washed with water, it was placed in 170 ℃, calcined for 6 hours to obtain a modified activated clay catalyst.

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Abstract

The invention discloses a method for preparing hydrogen-containing silicone oil, and relates to the technical field of silicone oil preparation. The key point of the technical solution is a method for preparing hydrogen-containing silicone oil, which includes the following steps: using cyclosiloxane as a reaction monomer, adding terminal hydrogen The end-capping agent is subjected to a polymerization reaction under the action of a modified activated clay catalyst. After the polymerization reaction is completed, the modified activated clay catalyst is filtered to collect a clear and transparent liquid to obtain hydrogen-containing silicone oil. The activated clay of the present invention is used as a catalyst in the catalytic equilibrium method, which reduces the usage amount of the catalyst, lowers the production cost, and the aftertreatment is mild and easy to operate, and the production process is simplified.

Description

technical field [0001] The invention relates to the technical field of silicone oil preparation, more specifically, it relates to a method for preparing hydrogen-containing silicone oil. Background technique [0002] Silicone oil usually refers to a linear polysiloxane product that maintains a liquid state at room temperature. Hydrogen-containing silicone oil is an important variety of silicone oil products, and its molecular formula is Me 3 SiO(MeHSiO) m (Me 2 SiO) n SiMe 3 , Its siloxane main chain contains active group hydrogen, which has high activity and can react with a variety of active groups. It is often used as a raw material for synthesizing block-modified silicone oil and graft-modified silicone oil. [0003] At present, there are mainly three methods for preparing hydrogen-containing silicone oil: first alcoholysis followed by hydrolysis, co-hydrolysis condensation, and catalytic equilibrium method. Gel, the product quality is unstable, and the performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/12C08G77/08
CPCC08G77/12C08G77/08
Inventor 高守云邹立岩
Owner 烟台开发区金宏化工有限公司
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