Neutralization direct crystallization production technology of acesulfame potassium

Abstract

The invention relates to a neutralization direct crystallization production technology of acesulfame potassium, the neutralization direct crystallization production technology of the acesulfame potassium includes neutralization reaction, separation and hydrolysis rough crystallization reaction stepS, and the neutralization direct crystallization production technology is characterized in that: a neutralization direct crystallization method is used in the neutralization reaction, an original alkali is directly added into a water-wash organic phase of a neutralization tank for stirring for reaction, after precipitation and stratification, acesulfame potassium crystals are directly separated to a crude evaporation kettle for heating to evaporate dichloromethane which is carried out, and then an acesulfame potassium crude product is obtained by freezing and centrifugation. The neutralization direct crystallization production technology has the advantages that: through use of the neutralization direct crystallization production technology, the production operation is simplified and the worker labor intensity is reduced; and compared with traditional production technologies in the prior art, the neutralization direct crystallization production technology removes alkali preparation, concentration and other operation, simplifies the operation, reduces the labor intensity, and saves a large amount of water and steam.

Description

Technical field: [0001] The invention relates to a production method for neutralization and direct crystallization of acesulfame. Background technique: [0002] The neutralization reaction in the traditional production process of Acesulfame is like figure 1 As shown, soda ash and soft water are prepared into a certain concentration of lye, pumped into the high tank, and added to the neutralization kettle together with the washed organic phase for neutralization, and the sugar water after the reaction is preheated, heated, precooled, frozen, and centrifuged After a series of steps, raw sugar can be obtained. Because it is intermittent production, manual operation is cumbersome and resource waste is serious, production cost is high, raw material waste is serious, and the temperature of the reactor varies greatly, the service life of the kettle is short, and the load of the ice machine is also caused. Unstable and heavy load. Intermittent production, low device utilization, high im...

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Problems solved by technology

[0002] The neutralization reaction in the traditional acesulfame potassium production process is as follows: figure 1 As shown, soda ash and soft water are prepared into lye with a certain concentration, pumped into the high-level tank, and added to the neutralization kettle together with the washed organic phase for neutralization, and the sugar water after reaction and separation is then preheated, heated, pre-cooled, frozen, and centrifuged After a series of steps, raw su

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