Environmentally-friendly benzyl chloride production method and device

Abstract

The embodiment of the invention discloses an environmentally-friendly benzyl chloride production method. The method comprises the following steps: feeding chlorine and methylbenzene into a chlorination reactor; performing optical chlorination; conveying the obtained chlorination liquid into a chlorination liquid storing tank for storing; conveying the chlorination liquid from the chlorination liquid storing tank into the middle part of a defluvium unguium rectifying tower; performing defluvium unguium rectifying; conveying the crude benzyl chloride product subjected to defluvium unguium rectifying into a crude product storing tank for temporary storing; conveying the crude benzyl chloride product from the crude product storing tank into the middle part of a finished product rectifying tower for rectifying the finished product; sampling and analyzing at every two hours; collecting the materials on the top of the tower when the benzyl chloride content is beyond 99.5wt%, the chlorotoluenecontent is less than 0.02wt%, and the 2, 4-dichlorotoluene content is less than 0.002wt%; and then feeding into a finished product packing system. With the adoption of the method, the benzyl chloridegoods containing chlorotoluene less than 300ppm and 2, 4-dichlorotoluene less than 20ppm can be continuously produced; and the demand of a dye company on environmentally-friendly benzyl chloride canbe met.

Description

technical field [0001] The invention relates to the production field of benzyl chloride, in particular to a production method and equipment of an environment-friendly grade benzyl chloride. Background technique [0002] With the continuous improvement of people's requirements for environmental protection, environmentally friendly dyes have become the goals pursued by major international dye companies. Benzyl chloride, as a conventional raw material for preparing dyes, has also been valued by various dye companies for its quality. The main impurity components of industrial benzyl chloride currently on the market have 3 kinds, toluene, ortho or para chlorotoluene, benzyl dichloride, wherein chlorotoluene is easy to become alkylphenols in the reaction process of preparing dyes, the The substance belongs to the category of environmental hormones, and the governments of various countries have imposed strict restrictions on this type of substance when testing the quality indicator...

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Problems solved by technology

[0003] The technical problem to be solved by the embodiments of the present invention is that the average content of the impurity chlorotoluene in the industrial benzyl chloride currently on the market is about 1000ppm, which cannot meet the requirements of dye companies to produce environmentally friendly dyes, and an environmentally friendly dye is proposed. Production method and equipment of benzyl chloride

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