Hydrolysis device for preparing p-toluenesulfonyl chloride and processing technology

Abstract

The invention relates to a hydrolysis device for preparing p-toluenesulfonyl chloride, which comprises a reaction kettle, and further comprises a cleaning mechanism, a uniform dripping mechanism, a stirring mechanism and a gasoline transmission mechanism. The invention further provides a p-toluenesulfonyl chloride processing technology, which comprises the steps of step 1, producing p-toluenesulfonyl chloride; step 2, conducting a hydrolysis reaction; step 3, adjusting the reaction temperature; step 4, conducting a dissolution reaction; step 5, carrying out self-cleaning; and step 6, standingfor separation. The technical problems that when solvent gasoline is added for dissolution, stirring needs to be conducted, then a stirring piece is not beneficial to sufficient layering and later separation of a mixture, in addition, the mixture left on the stirring piece cannot be cleaned and discharged in time, and the accuracy of the next hydrolysis reaction is influenced while the accuracy ofthe hydrolysis reaction at this time is reduced are solved.

Description

technical field [0001] The invention relates to the technical field of p-toluenesulfonyl chloride, in particular to a hydrolysis device for the preparation of p-toluenesulfonyl chloride and a processing technique. Background technique [0002] As a fine chemical product, p-toluenesulfonyl chloride is widely used in the dyestuff, medicine, and pesticide industries. In the dyestuff industry, it is mainly used to manufacture disperse, ice dyeing, and acid dye intermediates; in the pharmaceutical industry, it is mainly used to produce sulfonamides. Drugs - mesotrione, etc.; the pesticide industry is mainly used for mesotrione, sulcotrione, mefenaxyl, etc. With the continuous development of dyestuffs, pharmaceuticals, and pesticide industries, the international demand for this product is increasing Growth, especially in Europe and the United States, has broad market prospects. [0003] The patent document with the patent number CN2015209956449 discloses a refining system for the...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, by setting a driving mechanism to drive the uniform dripping mechanism, the uniform dripping mechanism can complete the intermittent dripping work of water on the one hand, and evenly fall in the process of moving down; on the other hand, it can change in real time The air pressure under the dripping mechanism is evenly increased, and the temperature of the reaction space drops slowly while the pressure gradually increases. At the same time, the heat emitted by the driving mechanism is used to heat the reactor when it is working, so that the temperature in the reactor increases from 70 ° C. The time for the temperature to drop to 50°C becomes longer, and then the water in the range of 70°C to 50°C is guaranteed to be added dropwise, thus solving the problem that solvent gasoline needs to be stirred when adding and dissolving, and the stirring piece is not conducive to the full completion of the mixture. Stratification and post-separation work, in addition, the mixture remaining on the agitator cannot be cleaned and discharged in time, which reduces the accuracy of this hydrolysis reaction and affects the accuracy of the next hydrolysis reaction.

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