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Pressure synthesis and refining process of methane chloride

A monochloromethane and methanol technology, applied in the field of advanced preparation, can solve the problems of unsatisfactory product purity, limited production of chloromethane, etc., and achieve the effects of saving energy consumption, prolonging service life and simplifying process

Inactive Publication Date: 2005-07-27
蓝星安迪苏股份有限公司
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AI Technical Summary

Problems solved by technology

However, the by-product recovery method is limited by the production and sales of the pesticide trichlorfon, the production of methyl chloride is limited, and the purity of the product cannot meet the requirements for the synthesis of methylchlorosilane

Method used

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Effect test

Embodiment Construction

[0016] The vaporized methanol and hydrogen chloride desorbed from hydrochloric acid enter the reaction kettle with zinc chloride solution in a certain proportion, and react at 160°C and 0.2MPa to form methyl chloride. Chloromethane and unreacted hydrogen chloride and methanol are condensed and cooled by the condenser, and part of the water and methanol are condensed and enter the vapor-liquid separator, and the separator is returned to the reactor to adjust the temperature of the reactor. The reaction produces methyl chloride, etc. and unreacted hydrogen chloride and methanol enter the bottom of the acid water tower together, and a certain amount of water is added to the top of the acid water tower to remove most of the hydrogen chloride and methanol. , dimethyl ether and a small amount of hydrogen chloride enter the bottom of the alkali washing tower from the top of the acid washing tower. Add 10% caustic soda washing solution to the top of the alkali washing tower to remove ...

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PUM

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Abstract

The present invention relates to a new process for producing methane chloride by using liquid-phase catalytic method and pressurization process. The hydrogen chloride and methyl alcohol are mixed according to a certain ratio, then placed in a tank reactor with catalyst, and under the condition of a certain temp. and pressure the invented methane chloride can be synthesized. It adopts acid / water washing and alkali-washing processes to remove unreacted methyl alcohol and hydrogen chloride, and adopts concentrated sulfuric acid washing process to remove residual water content and reaction by-product dimethyl ether, then the purified and dried methane chloride gas is undergone the processes of compression and condensation so as to obtain high-purity liquid methane chloride product.

Description

Technical field: [0001] The invention is an advanced preparation method for producing methyl chloride. Background technique: [0002] At present, there are three industrial production methods of methyl chloride, namely by-product recovery method, methane chlorination method, and methanol hydrochlorination method. [0003] The by-product recovery method is to freeze and dehydrate the mixed tail gas of methyl chloride and hydrogen chloride produced in the process of pesticide production, then dry it with concentrated sulfuric acid, neutralize the acid with solid alkali, and then compress and liquefy it to obtain the product methyl chloride. However, the by-product recovery method is restricted by the production and sales of the pesticide trichlorfon, the production of methyl chloride is limited, and the product purity cannot meet the requirements for the synthesis of methylchlorosilane. [0004] The methane chlorination method is to chlorinate methane and chlorine at a high t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/00C07C17/16C07C19/03
Inventor 郭守涛程红斌李红许银根曾阳陈梅徐贱生方海姣
Owner 蓝星安迪苏股份有限公司
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