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Method for preparing propyl trichlorosilane by using tail gas propylene in chloropropyl chlorosilane production process

A technology of chloropropylchlorosilane and propyltrichlorosilane, which is applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc., and can solve problems such as tail gas propylene safety hazards and environmental pollution , to achieve the effect of low cost, large market demand and huge economic benefits

Inactive Publication Date: 2021-07-09
JINGZHOU JIANGHAN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: provide a kind of process equipment is simple, has low production cost, good economic benefit, to solve the potential safety hazard and environmental pollution problem of tail gas propylene discharge in the existing chloropropyl chlorosilane production process using chloropropyl chloride Method for preparing propyltrichlorosilane from tail gas propylene in silane production process

Method used

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  • Method for preparing propyl trichlorosilane by using tail gas propylene in chloropropyl chlorosilane production process
  • Method for preparing propyl trichlorosilane by using tail gas propylene in chloropropyl chlorosilane production process

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Effect test

Embodiment 1

[0031] In two two-stage series-connected 3-ton addition reactors with stirring, first press 2000 kg of trichlorosilane, and then add 100 ml of catalyst respectively, turn on the stirring, and the stirring speed is 40 rpm, and the addition The temperature of the reaction kettle is controlled below 20°C, each brine condenser is opened, the brine temperature is -15~0°C, the feed valves of the one-stage addition reactor and the second-stage addition reactor are opened, and the chloropropylmethyl dichloride The tail gas propylene produced by silane under normal pressure continuously enters the first-stage addition reactor, and the feed flow rate is 80~100L / h. At the beginning of feeding, the temperature of the first-stage addition reactor rose slowly, and there was no feed flow in the second-stage addition reactor; the first-stage addition reactor was fed for 4 hours, and the temperature of the first-stage addition reactor was 35°C, and the second-stage addition reactor had no feed ...

Embodiment 2

[0034] In two two-stage series-connected 3-ton addition reactors with stirring, first press 2000 kg of trichlorosilane, and then add 200 ml of catalyst respectively, turn on the stirring, and the stirring speed is 40 rpm, and the addition The temperature of the reaction kettle is controlled below 20°C, each brine condenser is opened, the brine temperature is -15~0°C, the feed valves of the one-stage addition reactor and the second-stage addition reactor are opened, and the chloropropyltrichlorosilane The tail gas propylene produced under high pressure enters the first-stage addition reactor intermittently, and the feed flow rate is 50~80L / h. At the beginning of feeding, the temperature of the first-stage addition reactor rose slowly, and there was no feed flow in the second-stage addition reactor; the first-stage addition reactor was fed for 5 hours, and the temperature of the first-stage addition reactor was 39°C, and the second-stage addition reactor had no feed flow. The re...

Embodiment 3

[0037] In two two-stage series-connected 3-ton addition reactors with stirring, first press 2000 kg of trichlorosilane, then add 150 ml of catalyst, turn on the stirring, the stirring speed is 40 rpm, and the addition The temperature of the reaction kettle is controlled below 20°C, each brine condenser is opened, the brine temperature is -15~0°C, the feed valves of the one-stage addition reactor and the second-stage addition reactor are opened, and the chloropropyltrichlorosilane Tail gas produced under high pressure and propylene produced under normal pressure with chloropropylmethyldichlorosilane continuously enter the first-stage addition reactor with a feed flow rate of 50-80L / h. At the beginning of feeding, the temperature of the first-stage addition reactor rose slowly, and the second-stage addition reactor had no feed flow; the first-stage addition reactor was fed for 5 hours, and the temperature of the first-stage addition reactor was 41°C, and the second-stage addition...

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Abstract

The invention relates to a method for preparing propyl trichlorosilane by using tail gas propylene in a chloropropyl chlorosilane production process, and belongs to the technical field of fine chemical engineering. According to the method, by-product tail gas propylene generated in the production process of chloropropyl chlorosilane is used as a raw material and is subjected to an addition reaction with trichlorosilane under stirring, and distillation is performed to obtain a propyltrichlorosilane product. As a silane intermediate, propyl trichlorosilane can be used as a cross-linking agent, a coupling agent, a building waterproofing agent, a powder treating agent and many other material industries of RTV silicone rubber after hydrolysis, alcoholysis and acylation. The method has the advantages of simple equipment process and byproduct raw materials, not only creates huge economic benefits, but also solves the problems of safety, environmental protection and occupational health of tail gas propylene in the production process of chloropropyl chlorosilane, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing propyltrichlorosilane by using tail gas propylene in the production process of chloropropylchlorosilane, which belongs to the technical field of fine chemicals. Background technique [0002] At present, most of the production of chloropropyl trichlorosilane adopts pressure addition reaction process, the conversion rate of industrial products is about 75%, and about 15% of silicon tetrachloride, 6% of propyl trichlorosilane, 4% of Propylene; Chloropropylmethyldichlorosilane mostly adopts atmospheric pressure intermittent addition reaction process, the conversion rate of industrial products is about 76%, and about 12% of methyltrichlorosilane, 5% of methylpropyl dichlorosilane Silane, 7% propylene. According to the above data, it is estimated that about 500,000 tons of by-product propylene is produced in the global silane industry every year, that is, every ton of chloropropyl chlorosilane product will pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/14
CPCC07F7/14
Inventor 胡江华文少卿汤艳陈圣云甘俊甘书官
Owner JINGZHOU JIANGHAN FINE CHEM