High-purity m-phthaloyl chloride/paraphthaloyl chloride continuous reaction system and reaction method thereof

Abstract

The invention relates to the technical field of organic synthesis systems. The invention relates to a continuous reaction system, in particular to a continuous reaction system of high-purity m-phthaloyl chloride / paraphthaloyl chloride and a reaction method thereof. The device comprises a granulator, a mixing tank and a reaction kettle which are sequentially connected in series, an exhaust port ofthe reaction kettle is externally connected with a condenser; the discharge end of the condenser is communicated with the feed port of the mixing tank; an S-shaped channel is formed in the reaction kettle, a plurality of exhaust pipes penetrate through the S-shaped channel, a tail gas cavity is formed in the upper part of the reaction kettle, the tops of the exhaust pipes are positioned in the tail gas cavity and are communicated with the tail gas cavity, and a plurality of capillary holes are formed in the upper parts of the exhaust pipes positioned in the S-shaped channel. According to the invention, continuous reaction of acyl chloride products is realized, the occupied area of equipment is small, the space is saved, the operation process is simpler than that of an intermittent reaction, the reaction equipment does not have a complex pipeline, and the complexity of the process is reduced. The problem that the pipeline is easy to crystallize is solved, the energy consumption requiredby heat tracing of the process pipeline is saved, and the quality of a continuous reaction product is relatively stable.

Description

technical field [0001] The invention relates to the technical field of organic synthesis systems, in particular to a continuous reaction system of high-purity iso / terephthaloyl dichloride and a reaction method thereof. Background technique [0002] At present, the application number is 2014105170371, and the patent name is a continuous synthesis device and synthesis method of acid chlorides. The patent discloses a continuous synthesis device and synthesis method of acid chlorides. The continuous synthesis of acid chlorides is realized by setting 4 reaction kettles. This method has problems such as large equipment footprint, high energy consumption, complicated process, and tube Louis crystallization. [0003] In addition, other similar existing devices also generally have the problem of longer reaction time and reaction tail gas that cannot be discharged in time, which seriously restricts the production rate of the reaction process; in addition, the reaction raw materials / te...

AI Technical Summary

Problems solved by technology

[0002] At present, the application number is 2014105170371, and the patent name is a continuous synthesis device and synthesis method of acid chlorides. The patent discloses a continuous synthesis device and synthesis method of acid chlorides. The continuous synthesis of acid chlorides is realized by setting 4 reaction kettles. This method has problems such as large equipment footprint, high energy consumption, complex process, and tube Louis crystallization.

[0003] In addition, other similar existing devices also generally have the problem of longer reaction time and reaction tail gas that cannot be discharged in time, which seriously restricts the production rate of the reaction process; in addition, the reaction raw materials / terephthalic acid material particles are relatively large , affecting the reaction speed

Images