A process for continuously producing m-toluic acid
A technology for the production process of toluic acid, which is applied in the field of continuous production of m-toluic acid, can solve the problems of long heating time of the mixture to be separated, high energy consumption of process operation, and low single-pass yield of m-toluic acid. , to achieve the effect of inhibiting the generation of deep by-products, improving product production capacity, and improving corporate profit margins
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[0035] Such as figure 1 , figure 2 As shown, the continuous production process of m-toluic acid includes the synthesis production process corresponding to the synthesis section and the rectification production process corresponding to the rectification section.
[0036] The synthesis section includes a meta-xylene intermediate tank 1 for storing meta-xylene, and the meta-xylene intermediate tank 1 is connected with a meta-xylene feed pump 2 through a pipeline, and the meta-xylene feed pump 2 is connected with a meta-xylene exchange through a pipeline. Heater 3 and m-xylene heat exchanger 3 are connected to multi-stage external circulation reaction tower groups through pipelines.
[0037] The multi-stage external circulation reaction tower group includes two multi-stage external circulation reaction tower groups connected to each other, and is divided into a first multi-stage external circulation reaction tower 4 and a second multi-stage external circulation reaction tower 9,...
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