Method for producing trichloromethoxybenzene by using chlorobenzene as solvent

Abstract

The invention relates to a production method of an aromatic compound, in particular to a method for producing trichloromethoxybenzene by using chlorobenzene as solvent. The method comprises the following steps: using anisole as starting raw material and chlorobenzene as solvent to perform photo-chlorination reaction and recycling chlorobenzene to prepare trichloromethoxybenzene. The chemical equation is shown as below. In the method, chlorobenzene is used as the organic solvent of the photo-chlorination reaction for preparing trichloromethoxybenzene; as chlorobenzene is cheaper and can be better used in the photo-chlorination reaction, photo-chlorination reaction can be performed according to a proper molar ratio of chlorobenzene to the raw material anisole in the presence of proper catalyst under proper reaction conditions and trichloromethoxybenzene can be prepared better. Therefore, the method is suitable for industrial large-scale production.

Description

technical field The invention relates to a method for producing aromatic compounds, in particular to a method for producing trichloromethoxybenzene using chlorobenzene as a solvent. Background technique Photochlorination reaction is one of the procedures for preparing fine chemical products, and is also one of the important procedures for preparing trichloromethoxybenzene. The photochlorination reaction can be carried out without using a solvent, but in most cases, it is carried out in the presence of an organic solvent. A variety of organic solvents for photochlorination reactions have been proposed. Regarding the solvent used in the photochlorination reaction of trichloromethoxybenzene, there are carbon tetrachloride, glacial acetic acid, benzotrifluoride, o-chlorobenzotrifluoride, m-chlorobenzotrifluoride, p-chlorobenzotrifluoride, 1 , 2-dichlorotrifluoroethane, trichlorotoluene, etc. Using carbon tetrachloride as a solvent (CN1390820A), the molar ratio of anisole to c...

AI Technical Summary

Problems solved by technology

However, due to the relatively expensive price of 1.3-bistrifl...