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A method for removing low molecular weight device and producing methyl silicone oil with a viscosity of 30-1000000cs

A production method and technology for methyl silicone oil are applied in the field of high-efficiency production of 30-1,000,000cs high-purity methyl silicone oil, which can solve the problems of low efficiency of methyl silicone oil, rising production costs, and low efficiency in removing low-efficiency, and achieve production system safety and production efficiency. High and reduced production time effect

Active Publication Date: 2020-07-21
YICHANG COLLIN SILICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production of methyl silicone oil in China is divided into two production lines according to the low-viscosity production line (≦1000cs) and the high-viscosity production line (>1000cs). Viscosity 1000cs is the cut-off point, different performance indicators and viscosity detection methods are agreed, and the maximum viscosity allowed by the strong acidic cationic resin catalyst system is used as the basis to divide silicone oil into high and low viscosity). Since high and low viscosity silicone oils must be produced separately, equipment construction investment Large and high-viscosity production lines produce low-efficiency silicone oil with a viscosity above 12,500cs, and the efficiency of producing methyl silicone oil with a viscosity above 500,000cs is even lower, and the production cost will also increase a lot

Method used

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  • A method for removing low molecular weight device and producing methyl silicone oil with a viscosity of 30-1000000cs
  • A method for removing low molecular weight device and producing methyl silicone oil with a viscosity of 30-1000000cs
  • A method for removing low molecular weight device and producing methyl silicone oil with a viscosity of 30-1000000cs

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 2100Kg DMC to the stainless steel reaction kettle, start stirring and heat up, dehydrate at 80±5°C, vacuum degree -90kPa for 1h until there is no liquid in the sight glass. 300 Kg parts by weight of MDM were added after the vacuum was released. Raise the temperature to 120°C, then add 0.045Kg of catalyst to the stainless steel reaction kettle (the catalyst is: tetramethylammonium hydroxide alkali gel, put the above weight of tetramethylammonium hydroxide into 5Kg of DMC, stir at 130°C for about 1.5 hours prepared), continue to raise the temperature to 150°C, carry out polycondensation equilibrium reaction for 2.5h under the conditions of normal pressure and stirring speed of 150r / min. After the polymerization is completed, put the material into a special delowering device (before pressing into the delowering device, the second layer of flower board drawing and flashing plate must be placed in a horizontal position and locked with bolts. After opening the first layer...

Embodiment 2

[0026] Add 1000Kg D3 and 1100Kg D4 into the stainless steel reaction kettle, start stirring and raise the temperature, dehydrate at 80±5℃, vacuum degree -90kPa for 1h until there is no liquid in the sight glass. 240 Kg parts by weight of MDM were added after the vacuum was released. Raise the temperature to 120°C, then add 0.042Kg of catalyst to the stainless steel reaction kettle (the catalyst is: tetramethylammonium hydroxide alkali gel, put the above weight of tetramethylammonium hydroxide into 5Kg of DMC, stir at 130°C for about 1.5 hours prepared), continue to raise the temperature to 145°C, and carry out polycondensation equilibrium reaction for 2.5h under the conditions of normal pressure and stirring speed of 100r / min. After the polymerization is completed, put the material into a special delowering device (before pressing into the delowering device, the second layer of flower board drawing and flashing plate must be placed in a horizontal position and locked with bolt...

Embodiment 3

[0028]Add 800Kg D3 and 1300Kg D5 into the stainless steel reaction kettle, start stirring and raise the temperature, dehydrate at 82°C and vacuum degree -90kPa for 1h until there is no liquid in the sight glass. 160 Kg parts by weight of MDM were added after the vacuum was released. Raise the temperature to 125°C, then add 0.04Kg of catalyst to the stainless steel reaction kettle (the catalyst is: tetramethylammonium hydroxide alkali gel, put the above weight of tetramethylammonium hydroxide into 5Kg of DMC, stir at 130°C for about 1.5 hours prepared), continue to raise the temperature to 148°C, and carry out polycondensation equilibrium reaction for 2.5h under the conditions of normal pressure and stirring speed of 200r / min. After the polymerization is completed, put the material into a special delowering device (before pressing into the delowering device, the second layer of flower board drawing and flashing plate must be placed in a horizontal position and locked with bolts...

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Abstract

The invention provides a low molecule remover and a method for producing methyl silicone oil with viscosity of 30-1000000cs. A tube nest heating section is arranged on the top in the low molecule remover and performs heating with steam or conduction oil; and two tube nest drawing flash boards are designed below the heating section. The method for producing methyl silicone oil with viscosity of 30-1000000cs comprises the following steps: adding one or several of D3, D4, D5 and D6 rings into a stainless steel reactor, and dewatering until no liquid is seen by sight glass; adding an end-capping reagent after vacuum is eliminated, continuously heating to 120+ / -5 DEG C, adding a catalyst into the stainless steel reactor, continuously heating to 145+ / -10 DEG C, and carrying out a polycondensation equilibrium reaction for 2-3 hours; pressing the materials into the low molecule remover after polymerization is completed, continuously removing low molecules at a temperature of 220+ / -5 DEG C; andadding the material into a silicone oil storage tank, and performing product detection. The device is simple, the investment is less, high-purity methyl silicone oil produced by the device has a wideviscosity range from 30cp to 1000000cs, the quality of methyl silicone oil can meet the national standard requirement of China, and industrialized production can be realized.

Description

technical field [0001] The invention belongs to the technical field of chemical organic silicon production, and in particular relates to a method for high-efficiency production of 30-1,000,000 cs high-purity methyl silicone oil. Background technique [0002] Silicone material, as a new type of high-tech material, has been widely used in electronics, electrical appliances, aviation, aerospace, construction, textiles, medicine, daily chemicals and other fields since its industrial production in the early 1940s. It is an indispensable new material for the improvement of people's living standards. Silicone materials are mainly divided into four categories: silicone rubber, silicone oil, silicone resin, and silane coupling agent. Among them, silicone oil is the main component of silicone materials, and its annual consumption accounts for about 25% of the domestic silicone material market. [0003] At present, the production of methyl silicone oil in China is divided into two pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/06
CPCC08G77/06
Inventor 尹华金杜宏伟张红玲
Owner YICHANG COLLIN SILICON MATERIAL CO LTD
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