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Method fo rproducing high pure methane chloride

A technology of monochloromethane and production method, applied in chemical instruments and methods, halogenated hydrocarbon preparation, organic chemistry and other directions, can solve problems such as quality and environmental protection problems, and achieve the effects of no environmental pollution, simple process and investment saving.

Inactive Publication Date: 2005-10-26
江苏梅兰化工有限公司
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Problems solved by technology

[0005] In order to solve the quality and environmental protection problems in the traditional synthetic monochloromethane process, the present invention provides a high-purity monochloromethane production method

Method used

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  • Method fo rproducing high pure methane chloride
  • Method fo rproducing high pure methane chloride

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Embodiment Construction

[0011] according to figure 1 As shown, the methanol and hydrogen chloride superheated to 180-220 ° C are 1: 1.1 ~ 1.3 (molar ratio), in the presence of a catalyst, at 280-320 ° C, 0.2-0.4MpaG conditions, the gas phase reaction generates monochloromethane and Water, the high-temperature reaction gas out of the reactor is quenched by dilute hydrochloric acid and the temperature drops to about 120°C. The quenched liquid after separation is 20% hydrochloric acid, which is used to produce 31% industrial hydrochloric acid. After separation, the moisture passes through the condenser Condensate (the condensate is dilute hydrochloric acid for quenching the reaction gas), dry with sulfuric acid, compress and condense to obtain the crude product of monochloromethane. The crude product of monochloromethane passes through the first rectification tower to remove the light components in the crude material of monochloromethane, and then passes through the second rectification tower to remove ...

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Abstract

The present invention discloses a method for producing high-purity methane chloride. It uses methyl alcohol and hydrogen chloride as raw material, in the pressure of active catalyst, under the conditiojn of 280-320 deg.C and 0.2-0.6 MPa it utilizes gas-phase reaction to 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 condenser, then dried by sulfuric acid, compressed and condeased to obtain methane chloride crude product, then said method makes said crude product pass through first rectification tower to remove light component from said methane chloride crude material, then makes it pass through secondary rectification tower to remove heavy component so as to raise methane chloride content, its purity can be greater than 99.96%.

Description

technical field [0001] The invention relates to a method for producing high-purity monochloromethane. Background technique [0002] At present, the synthesis of monochloromethane generally adopts liquid-phase catalytic method or gas-solid phase catalytic method. These two methods all adopt the process of washing with water, alkali washing and drying with sulfuric acid to prepare monochloromethane. This process has the following disadvantages: [0003] (1) The content of monochloromethane produced is low, generally 98-99%. [0004] (2) Large pollution and high cost cannot meet the high-end market demand. Contents of the invention [0005] In order to solve the quality and environmental protection problems in the traditional process of synthesizing monochloromethane, the invention provides a high-purity monochloromethane production method. [0006] The technical scheme of the present invention is: in the presence of an active proprietary catalyst, methanol and hydrogen ch...

Claims

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Application Information

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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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