Device and method for preparing methylsulfonyl fluoride through continuous reaction

Abstract

The invention discloses a device and a method for preparing methylsulfonyl fluoride through continuous reaction. The device comprises a reaction kettle body and a filtering device, bases are fixed at the lower ends of the reaction kettle body and the filtering device, base plates are fixed at the lower ends of the bases, the filtering device and the reaction kettle body are connected through a connecting pipe, one side of the reaction kettle body is connected with a methylsulfonyl chloride conveying pipe and a KF solution input pipe, a filler layer and a liquid distributor are arranged in the reaction kettle body, and one side of the filtering device is connected with a KCl crystal discharging pipe and a mother liquor discharging pipe. According to the device and the method, continuous reaction can be realized, the efficiency is higher than that of an intermittent kettle, anti-corrosion materials under various working conditions can be selected for all parts in a targeted manner, intrinsic safety is realized in the aspects of equipment strength and corrosion prevention, remote data display and automatic operation are realized through a DCS, and personnel contact can be avoided especially under the working condition with highly toxic substances, and the safety is greatly improved.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a device and method for continuous reaction to prepare methanesulfonyl fluoride. Background technique [0002] In the process of chemical production, the reaction process of two-phase immiscible substances often occurs. Because of their immiscibility, the reaction interface is small, and most of them are accompanied by the formation of solid by-products. The reaction time is long and the efficiency is low. In the production process of methanesulfonyl fluoride, it is particularly obvious. [0003] In the production of trifluoromethanesulfonic acid, methanesulfonyl chloride is used as raw material to react with KF to generate methanesulfonyl fluoride, which is produced intermittently in a reactor. The production process requires continuous high-power stirring, low efficiency, high energy consumption, and automation. The degree is not high. During solid-liquid separation, resi...

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Problems solved by technology

[0003] In the production of trifluoromethanesulfonic acid, methanesulfonyl chloride is used as raw material to react with KF to generate methanesulfonyl fluoride, which is produced intermittently in a reactor. The production process requires continuous high-power stirring, low efficiency, high energy consumption, and automation. The degree is not high, and residual methanesulfonyl fluoride will be contained in the residual potassium chloride in the kettle during solid-liquid separation, which will bring great difficulty and potential safety hazard to the subsequent washing and blowdown of the kettle and the purification of KCl. Both methanesulfonyl chloride and methanesulfonyl fluoride are highly poisonous, and there are many operations by personnel, and the safety risk is relatively high. Therefore, we have proposed a device and method for continuous reaction preparation of methanesulfonyl fluoride to solve the above problems

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