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Preparation method of methane chloride

A technology of monochloromethane and methanol, which is applied in the field of preparation of monochloromethane, can solve environmental problems and other problems, and achieve the effects of no environmental pollution, saving investment, and simple process

Inactive Publication Date: 2005-10-26
江苏梅兰化工有限公司
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the environmental protection problems in the traditional synthetic monochloromethane process, the invention provides a kind of monochloromethane preparation method

Method used

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  • Preparation method of methane chloride
  • Preparation method of methane chloride

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Embodiment Construction

[0012] The methanol and hydrogen chloride superheated to 180-220℃ are 1:1.1-1.3 (molar ratio), in the presence of a proprietary catalyst, under the conditions of 280-320℃, 0.2-0.4MpaG, the gas phase reacts to produce monochloromethane and water After the high temperature reaction gas exiting the reactor is chilled by dilute hydrochloric acid, the temperature is reduced to about 90-140℃. The separated chilled liquid is 20% hydrochloric acid (the acid is used to produce 31% hydrochloric acid for external sales), and the separated moisture Condensed by a condenser (dilute hydrochloric acid is used for the quenching of the reaction gas in the condensate), dried with sulfuric acid, and compressed and condensed to obtain monochloromethane.

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Abstract

The present invention discloses a preparation method of methane chloride. It uses methyl alcohol and hydrogen chloride as raw material, in the pressure of active catalyst, under the condition of 260-320 deg.C and 0.2-0.6 MpaG it utilizes gas-phase reaction of obtain methane chloride and water, after the high-temperature reaction gas discharged from reactor is chilled by dilute hydrochloric acid, the separated humid gas is condensed by means of condenser, dried by utilizing sulfuric acid, compressed and condensed so as to obtain methane chloride.

Description

Technical field [0001] The invention relates to a method for preparing monochloromethane. Background technique [0002] At present, the synthesis of monochloromethane generally adopts liquid phase catalysis or gas-solid phase catalysis, both of which use water washing and alkaline washing processes. The process has the following disadvantages: [0003] (1) The production process produces a large amount of acidic and alkaline wastewater. On the one hand, it increases production costs, on the other hand, it puts a lot of pressure on environmental protection. [0004] (2) The organic matter methanol, monochloromethane, etc. contained in the wastewater can be discharged after the treatment reaches the standard. There are certain difficulties in the treatment of sewage and it is easy to cause environmental pollution. [0005] (3) The process is complicated and the process is too long, which increases the investment. Summary of the invention [0006] In order to solve the environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/03
Inventor 周虎宏叶振高永宝
Owner 江苏梅兰化工有限公司
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