Production process of tetramethyldivinyldisiloxane

A technology of tetramethyldivinyldisiloxane and tetramethyldivinyldisiloxane, which is applied in the direction of silicon organic compounds, can solve the problems of wasting investment costs and difficult disposal, and reduce environmental protection The effect of pressure, sodium ethoxide content reduction, and production cost reduction

Active Publication Date: 2010-08-04
浙江佳汇新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an economical, effective The production process of tetramethyldivinyldisiloxane

Method used

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  • Production process of tetramethyldivinyldisiloxane
  • Production process of tetramethyldivinyldisiloxane
  • Production process of tetramethyldivinyldisiloxane

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The production process of tetramethyldivinyldisiloxane, such as figure 1 shown, including the following steps:

[0026] The first step: put dimethyldiethoxysilane and metal sodium into the reaction kettle, heat the reaction kettle, raise the temperature to dissolve dimethyldiethoxysilane and metal sodium, and pass chlorine after the dissolution is complete For ethylene, control the temperature at 90°C and control the pressure at 0MPa to make it react;

[0027] Step 2: Take dimethyldichlorosilane and store it in a storage tank for later use, then put the above reaction product into the initial steamer, then open the valve of the storage tank, and start to add dimethyl dichlorosilane dropwise to the initial steamer. Dichlorosilane, the speed is controlled at 8-18L / h, and the temperature of the initial steamer is controlled at 70°C at the same time, and the pressure of the initial steamer is controlled at 0MPa. Small amount of addition or even close the valve, until the ...

Embodiment 2

[0039] The production technology of tetramethyl divinyl disiloxane comprises the steps:

[0040] The first step: put dimethyldiethoxysilane and metal sodium into the reaction kettle, heat the reaction kettle, raise the temperature to dissolve dimethyldiethoxysilane and metal sodium, and pass chlorine after the dissolution is complete For ethylene, control the temperature at 70°C and control the pressure at 0.2MPa to make it react;

[0041] Step 2: Take dimethyldichlorosilane and store it in a storage tank for later use, then put the above reaction product into the initial steamer, then open the valve of the storage tank, and start to add dimethyl dichlorosilane dropwise to the initial steamer. Dichlorosilane, the speed is controlled at 8-17L / h. At the same time, the temperature of the initial steamer is controlled at 60°C by using the jacket heating or cooling system, and the pressure of the initial steamer is controlled at 0.1MPa. During this process, when the kettle pressure o...

Embodiment 3

[0047] The production technique of tetramethyl divinyl disiloxane is characterized in that: comprises the steps:

[0048] The first step: put dimethyldiethoxysilane and metal sodium into the reaction kettle, heat the reaction kettle, raise the temperature to dissolve dimethyldiethoxysilane and metal sodium, and pass chlorine after the dissolution is complete For ethylene, control the temperature at 70°C and control the pressure at 0MPa to make it react;

[0049] Step 2: Take dimethyldichlorosilane and store it in a storage tank for later use, then put the above reaction product into the initial steamer, then open the valve of the storage tank, and start to add dimethyl dichlorosilane dropwise to the initial steamer. Dichlorosilane, the speed is controlled at 8-18L / h, while the temperature of the initial steamer is controlled at 60°C, and the pressure of the initial steamer is controlled at 0MPa. During this process, when the pressure of the still or the temperature of the stil...

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Abstract

The invention relates to a production process of an organic material and discloses a production process of tetramethyldivinyldisiloxane. On the basis of the production process of the tetramethyldivinyldisiloxane in the prior art, a technical process of dripping dimethyldichlorosilane is adopted before a predistillation step, the dripped dimethyldichlorosilane reacts with sodium ethylate generated in a reaction to form dimethyldiethoxysilane and sodium chloride mainly, the sodium ethylate content of waste residues is reduced or zero, so the damages caused by sodium ethylate to human bodies and the environment are reduced, the risks in storage and transportation process are reduced, the production cost is reduced and the environmental protection burden is relieved.

Description

technical field [0001] The invention relates to a production process of organic matter, in particular to a production process of tetramethyldivinyldisiloxane. Background technique [0002] At present, when the production process of tetramethyldivinyl disiloxane (commonly known as organosilicon end-capping agent) is produced in the silicone industry, old processes are used, such as figure 1 As shown, the process is as follows: 1. Take the raw material sodium metal and dimethyldiethoxysilane, put the measured dimethyldiethoxysilane and metal sodium into the kettle, heat up and dissolve, and then dissolve them completely Feed vinyl chloride to react, the temperature is controlled below 90°C, and the pressure is below 0.2MPa. Generally, the reaction time is calculated according to the material balance; Below ℃, the pressure is below 0.1MPa, when there is no liquid in the still, the distillation ends; the steamed liquid enters the hydrolysis kettle as an intermediate material fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08
Inventor 杨亦清
Owner 浙江佳汇新材料有限公司
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