Acesulfame synthesis and acylation production process

Abstract

The invention relates to an acesulfame synthesis and acylation production process, which comprises the following steps of a, putting a sulfamic acid and dichloromethane into a dissolving kettle, and pumping a mixture into a synthesis kettle; b, adding dropwise triethylamine into the synthesis kettle, adding dropwise a glacial acetic acid, and performing natural reaction for 1 hour after the glacial acetic acid is added dropwise; c, placing reactants in the synthesis kettle into an acylation kettle, and adding dropwise diketene for an acylation reaction; and d, after the diketene is added dropwise, circulating a product subjected to the acylation reaction for 1 hour in the acylation kettle, placing into a heat-preservation kettle, performing natural reaction for 1 hour to generate an acetoacetyl-N-sulfonate intermediate, and feeding the acetoacetyl-N-sulfonate intermediate to a sulfonation section for use. The acesulfame synthesis and acylation production process has the advantages that 1, a stepwise reaction mode is adopted, so that compared with a conventional single-kettle production process, the method has the characteristics of production operation continuity and high reaction stability; 2, a multi-kettle stepwise production mode is adopted, so that the production efficiency is greatly improved, the reaction efficiency of the whole production flow is optimized, and the economic benefits of an enterprise are significantly improved.

Description

Technical field: [0001] The invention relates to a production method of the synthetic acylation section in the production of acesulfame potassium. Background technique: [0002] In the traditional production process of acesulfame potassium, the synthesis section such as figure 1 As shown, various raw materials are added to the synthesis kettle according to the batching amount, and all reactions are carried out in the same reactor. The process reaction time is long, the production capacity is low, the conversion rate is low, there are many by-products, and the production cost is high. Invention content: [0003] The purpose of the present invention is to overcome the shortcoming of long reaction time, low production capacity, low conversion rate and many by-products existing in the one-pot reaction in the prior art, and provides a step-by-step acylation reaction process for producing acesulfame potassium. [0004] In order to achieve the above object, the present invention...

AI Technical Summary

Problems solved by technology

[0002] In the traditional production process of acesulfame potassium, the synthesis section such as figure 1 As shown, various raw materials are added to the synthesis kettle according to the batching amount, and all reactions are carried out in the same reaction kettle. The process reaction time is long, the production capacity is low, the conversion rate is low, there are many by-products, and the production cost is high.

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