Sulfonation reaction cooling method in acesulfame synthesis technology

A technology of sulfonation reaction and synthesis process, which is applied in the field of sulfonation reaction cooling in the synthesis process of acesulfame potassium, can solve the problems of large influence of brine pump efficiency and large cooling loss in the control process, so as to reduce equipment purchase and installation costs and maintenance. Maintenance cost, effect of eliminating constraints

Inactive Publication Date: 2015-12-02
ANHUI JINGHE IND
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Problems solved by technology

[0003] Aiming at the disadvantages of large cold loss in the control process of the existing cooling method and being greatly affected by the efficiency of the brine pump, the present invention provides a cooling method fo

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  • Sulfonation reaction cooling method in acesulfame synthesis technology
  • Sulfonation reaction cooling method in acesulfame synthesis technology

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Embodiment Construction

[0008] like figure 2 As shown, the present invention provides a method for cooling the sulfonation reaction in the synthesis process of acesulfame potassium, which utilizes the characteristics of low specific gravity and low boiling point of liquid ammonia to take away the heat of the sulfonation reaction through the sublimation of liquid ammonia to achieve the purpose of cooling. Liquid ammonia is used instead of the traditionally used cryogenic brine as a coolant to enter the heat exchanger to directly cool down the sulfonation tank, and the temperature in the sulfonation tank is controlled by adjusting the flow rate of liquid ammonia to meet the temperature requirements of the sulfonation reaction.

[0009] Specific steps:

[0010] 1) Turn on the sulfonation circulating pump to make the material enter the heat exchanger tube;

[0011] 2) Turn on the ice machine, turn on the evaporative condenser, and turn on the ammonia valve to allow liquid ammonia to enter the heat exch...

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Abstract

The invention discloses a sulfonation reaction cooling method in an acesulfame synthesis technology. The method is characterized in that liquid ammonia is adopted to replace copious cooling brine and enters a heat exchanger as a cooling agent to directly cool a sulfonation kettle, and the temperature in the sulfonation kettle is controlled by regulating the flow of the liquid ammonia so as to meet the temperature requirement of sulfonation reaction. The method has the advantages that based on the characteristics of low specific gravity and low boiling point of the liquid ammonia, heat generated in sulfonation reaction is taken away through sublimation of the liquid ammonia so as to achieve cooling. Compared with an existing cooling method, restrictions on production from brine pumps are eliminated, the usage quantity of brine pumps is reduced, and a large amount of electric energy is saved; the purchase and installation cost and the repair and maintenance cost of brine tanks and dry evaporative cooling equipment are lowered, annual calcium chloride consumption and soft water consumption are reduced, and influences on the environment in the overhaul process are eliminated.

Description

technical field [0001] The invention relates to the field of acesulfame K synthesis technology, in particular to a cooling method for sulfonation reaction in the acesulfame K synthesis technology. Background technique [0002] The sulfonation section is the main section that affects the yield of acesulfame potassium, and the reaction in this section needs to be carried out below -30°C to ensure the smooth progress of the reaction. The sulfonation section of the traditional acesulfame production process such as figure 1 As shown, the temperature in the kettle is controlled by cooling the temperature of cryogenic brine (more than 30% calcium chloride solution). The cryogenic brine enters the heat exchanger through the brine pump, and the cold loss is large during the control process. Indirect control is not conducive to production regulation. The efficiency of the water pump is greatly affected. This project uses the characteristics of low specific gravity and low boiling po...

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Application Information

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IPC IPC(8): C07D291/06
CPCC07D291/06Y02P20/10
Inventor 王从春祁飞
Owner ANHUI JINGHE IND
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