Industrial preparation method of carbon tetrachloride transferring to methyl chloride and its fixed bed reactor

A technology of fixed bed reactor and carbon tetrachloride, which is applied in chemical instruments and methods, preparation of halogenated hydrocarbons, organic chemistry, etc., can solve the problem that carbon tetrachloride is not found to be converted into methylene chloride, etc., and achieve energy saving , Improve the effect of reaction speed

Inactive Publication Date: 2006-04-26
江苏梅兰化工有限公司
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Problems solved by technology

Especially have not found the industrial production method that carbon tetrachloride is converted into methylene chloride preferably so far

Method used

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  • Industrial preparation method of carbon tetrachloride transferring to methyl chloride and its fixed bed reactor
  • Industrial preparation method of carbon tetrachloride transferring to methyl chloride and its fixed bed reactor
  • Industrial preparation method of carbon tetrachloride transferring to methyl chloride and its fixed bed reactor

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Embodiment Construction

[0012] according to figure 1 , the raw material methanol is sent from the methanol storage tank to the methanol evaporator by the methanol pump, and is vaporized with steam. The vaporized methanol is preheated to 150°C in the preheater, and then superheated to 150°C by the methanol superheater with heat transfer fluid. -240°C. The raw material carbon tetrachloride is sent to the carbon tetrachloride evaporator from the carbon tetrachloride daily storage tank, and is vaporized with steam. -240°C. Hydrogen chloride gas from the outside world is superheated to 150-240 ° C with heat transfer fluid in the hydrogen chloride superheater, and then mixed with superheated methanol from the methanol superheater and carbon tetrachloride superheated by the carbon tetrachloride superheater according to the feed volume ratio at the initial stage of the reaction For, methyl alcohol: hydrogen chloride=1: 1-1.4 or methyl alcohol: carbon tetrachloride: water=1: 0.25-0.35: 0.5-1; During normal ...

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Abstract

The present invention discloses industrial preparation process and fixed bed reactor for converting carbon tetrachloride into methane monochloride. After methanol and carbon tetrachloride are evaporated separately in evaporators and methanol, carbon tetrachloride and hydrogen chloride are overheated in overheaters at 150-240 deg.c, they are catalytically reacted as required inside a fixed bed reactor at reaction temperature 160-300 deg.c and reaction pressure 0.05-0.45 MPaG. In the initial stage, the volume ratio of materials is methanol / hydrogen chloride of 1 to 1-1.4, or methanol / carbon tetrachloride / water is 1 to 0.25-0.35 to 0.5-1; and during the normal reaction, the volume ratio of materials is methanol / carbon tetrachloride / hydrogen chloride of 1 to 0.25-0.35 to 0-0.4, or methanol / carbon tetrachloride of 1 to 0.25-0.35. The fixed bed reactor is a shell-and-tube one with bed layer diameter 1500-3200 mm, effective tube array length 1500-4500 mm and tube array diameter 32-80 mm.

Description

technical field [0001] The invention relates to an industrial preparation method for converting carbon tetrachloride into monochloromethane and a fixed-bed reactor thereof. Background technique [0002] Due to the restrictions of relevant conventions, the use of carbon tetrachloride is relatively small. With the development of the chlor-alkali industry, the rational digestion of carbon tetrachloride will become an important factor affecting the environmental protection of chloroform preparation in the future. Especially have not found the industrial production method that carbon tetrachloride is converted into methyl chloride preferably so far. Contents of the invention [0003] The invention provides an industrial preparation method for converting carbon tetrachloride into methylene chloride by using a fixed-bed reactor. [0004] A preparation method for converting carbon tetrachloride into monochloromethane according to the present invention, methanol and carbon tetrach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/03C07C17/00
Inventor 叶振王斌黄鸿儒
Owner 江苏梅兰化工有限公司
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