Methane chlorides production process utilizing chlorination reaction heat

Abstract

The invention discloses a process for producing methane chloride by chlorination reaction heat. The process comprises a hydrochlorinate process and a chlorination process, wherein the chlorination process comprises the following steps that: after methane chloride gas prepared by the hydrochlorinate process and subchloride gas separated from mixture of a chlorination reaction are mixed and preheated, the methane chloride gas and the subchloride gas are mixed with chlorine and are introduced to a chlorination reactor to react; reaction mixture exchanges heat with raw material gas mixture of the methane chloride and the subchloride through a heat exchanger to preheat the raw material gas mixture, meanwhile, after the reaction mixture self is cooled, the reaction mixture enters a quenching tower to be cooled and washed, and enters a separating column to be separated; chlorine hydride gas and the subchloride gas are separated from gas vaporized from the top of the separating column through condensing separation, and are used as raw materials of the hydrochlorinate process and the chlorination process to be recycled; and methylene dichloride, methenyl trichloride and carbon tetrachloride are obtained from a mixed liquid obtained from the bottom of the separating column through rectifying separation. The process sufficiently and effectively reclaims mass high-grade heat energy carried by the mixture of high-temperature chlorination reaction, can greatly save energy, and reduce production cost.

Description

technical field [0001] The invention relates to an organic compound production process, in particular to a methane chloride production process utilizing chlorination reaction heat. Background technique [0002] Methane chloride is the general name of monochloromethane, dichloromethane, chloroform and carbon tetrachloride. It is an important chemical raw material and organic solvent, and it is also the main product of chlorine balance in chlor-alkali enterprises. In recent years, with the rapid development of the national economy and the further expansion of the application field of methane chloride, the domestic production and consumption of methane chloride have developed rapidly. [0003] At present, domestic and foreign manufacturers mainly use the methanol method to produce methane chloride. The methanol method is divided into two steps: the first step is the hydrochlorination reaction of methanol and hydrogen chloride to generate monochloromethane; the second step is t...

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Problems solved by technology

[0004] The above-mentioned production process has the following problems: the reaction mixture discharged from the chlorination reactor is a high-temperature gas containing a large amount of high-grade heat energy that can be recycled and utilized, but it cannot be fully and effectively recycled, resulting in a great waste of energy

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