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A method of using methyl chloride as a refrigerant to strengthen the condensation treatment of hydrogen chloride produced by the hydrolysis of chlorosilanes

A technology of methyl chloride and chlorosilane, which is applied in the field of silicone production, can solve problems such as increased entrainment of silicone oil, impact on the quality of methyl chloride, equipment blockage, etc., and achieve the effects of reducing entrainment of silicone oil, optimizing condensation effect, and stabilizing product quality

Active Publication Date: 2022-03-11
ZHENJIANG JIANGNAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the hydrogen chloride gas purification and cooling system consists of a condenser and a demister. The condensation uses ethylene glycol as a non-contact refrigerant for graphite heat exchange. Since the hydrogen chloride gas is directly precipitated from the silicon oil (hydrolyzate), the gas flow is bound to entrain the silicon oil. Subsequent process; at the same time, the efficiency of the demister after long-term use is difficult to match and purify, so the entrainment of silicone oil in the hydrogen chloride gas sent to the synthesis of methyl chloride increases significantly, and the participation of silicone oil in the follow-up reaction will inevitably affect the quality of methyl chloride. It is easy to polymerize in acidic medium and cause blockage of equipment

Method used

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  • A method of using methyl chloride as a refrigerant to strengthen the condensation treatment of hydrogen chloride produced by the hydrolysis of chlorosilanes

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Embodiment 1

[0015] Method for reducing hydrogen chloride producing chloride produced by cold chloride as a refrigerant, methanol, and hydrogen chloride reacting from hydrogen chloride gas purifying cooling system, liquid phase chloromethane, fluidized with silicon powder In the bed, the chlorosilane mixed monomer was reacted, and the hydrolyzed acid hydrolyzed generated polymethylsiloxane and by-product hydrogen chloride were generated by purified separation of hydrolyzed hydrogen chloride. After washing the tower, the hydrogen chloride gas purification cooling system is obtained, wherein the hydrogen chloride gas purification cooling system includes a first condenser, a first derogator, a second condenser, and a second derivator, which will be communicated in sequentially through a pipe. The liquid phase chloroform obtained by the chloromethane synthesis process is divided into two channels, and the first route is sent to the chloroformation of the chloroformation. It is used for subsequent ...

Embodiment 2

[0017] Method for reducing hydrogen chloride producing chloride produced by cold chloride as a refrigerant, methanol, and hydrogen chloride reacting from hydrogen chloride gas purifying cooling system, liquid phase chloromethane, fluidized with silicon powder In the bed, the chlorosilane mixed monomer was reacted, and the hydrolyzed acid hydrolyzed generated polymethylsiloxane and by-product hydrogen chloride were generated by purified separation of hydrolyzed hydrogen chloride. After washing the tower, the hydrogen chloride gas purification cooling system is obtained, wherein the hydrogen chloride gas purification cooling system includes a first condenser, a first derogator, a second condenser, and a second derivator, which will be communicated in sequentially through a pipe. The liquid phase chloroform obtained by the chloromethane synthesis process is divided into two channels, and the first route is sent to the chloroformation of the chloroformation. It is used for subsequent ...

Embodiment 3

[0019] Method for reducing hydrogen chloride producing chloride produced by cold chloride as a refrigerant, methanol, and hydrogen chloride reacting from hydrogen chloride gas purifying cooling system, liquid phase chloromethane, fluidized with silicon powder In the bed, the chlorosilane mixed monomer was reacted, and the hydrolyzed acid hydrolyzed generated polymethylsiloxane and by-product hydrogen chloride were generated by purified separation of hydrolyzed hydrogen chloride. After washing the tower, the hydrogen chloride gas purification cooling system is obtained, wherein the hydrogen chloride gas purification cooling system includes a first condenser, a first derogator, a second condenser, and a second derivator, which will be communicated in sequentially through a pipe. The liquid phase chloroform obtained by the chloromethane synthesis process is divided into two channels, and the first route is sent to the chloroformation of the chloroformation. It is used for subsequent ...

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Abstract

The invention provides a method for using methyl chloride as a refrigerant to strengthen the condensation treatment of hydrogen chloride produced by the hydrolysis of chlorosilanes. Chlorosilane monomers are subjected to concentrated acid hydrolysis to generate polymethylsiloxane and by-product hydrogen chloride; after the hydrolyzate passes through a phase separator, the hydrogen chloride After the gas is washed by the scrubber, it enters the hydrogen chloride gas purification and cooling system, wherein the hydrogen chloride gas purification and cooling system includes a first condenser, a first demister, a second condenser and a second demister that are connected in sequence through pipelines. directly inject methyl chloride into the pipeline between the first mist eliminator and the second condenser; the present invention adds liquid-phase methyl chloride as refrigerant in the hydrogen chloride gas purification cooling system, and optimizes the condensation of the hydrogen chloride gas purification cooling system As a result, the silicone oil entrained in the hydrogen chloride is further coalesced to form oil droplets, which are finally intercepted by the demister, achieving the purpose of reducing the entrainment of silicone oil in the hydrogen chloride gas.

Description

Technical field [0001] The present invention relates to the field of silicone production, and more particularly to a method involving one chloride as a refrigerant to strengthen condensation treatment of chloride hydrolysis production. Background technique [0002] Organic dichlorosilanes are the main products synthesized by silicone monomers, such as dimethyl dichlorosilanes, dimethyl dichlorosilane concentrated acid hydrolyzate, linear or cyclic organosiloxanes and hydrogen chloride; conventional hydrogen chloride purification processes are : After the reaction material is hydrolyzed, the hydrogen chloride gas supplied to the phase separator is separated and produced by the hydrogen chloride gas purification cooling system to obtain a hydrogen chloride after dry purification, and then sent to the chloromethane synthesis step; [0003] At present, the hydrogen chloride gas purification cooling system is composed of a condenser and a dexactor. Condensation uses ethylene glycol to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/01
CPCC01B7/01
Inventor 谈钱戬孟庆曦王勇李显同卞正冬陈玉国纪倪杰孙洁
Owner ZHENJIANG JIANGNAN CHEM