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Acesulfame optimized crystallization process

A kind of acesulfame potassium and crystallization technology, applied in the direction of organic chemistry, etc., can solve the problems of high cost, complicated process, poor quality, etc., and achieve the effect of improving production efficiency, simple process, and reducing shallow cooling load

Inactive Publication Date: 2020-02-21
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of complex process, high cost and poor quality in the prior art, and provide an optimized crystallization production process of acesulfame potassium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one, such as figure 2 Shown:

[0019] 1. Put 70m³ of sugar water and 7 m³ of methylene chloride produced in the neutralization section of the acesulfame-K production process into the first mixer;

[0020] 2. After being mixed by the first mixer, it enters the separator, and 6.9 m³ of methylene chloride obtained from the layered heavy phase enters the rectification system, and 70.1 m³ of sugar water obtained from the layered light phase enters the second mixer, and the sugar water in the second mixer Add 10Kg of activated carbon, fully circulate through the circulation pump, and heat to 70°C through an external heat exchanger, and 550L of dichloromethane evaporates from the sugar water and enters the rectification system.

[0021] 3. After the preheating treatment, the sugar-water suspension is poured into the MVR in 4 batches, and concentrated at 85°C. When the concentrated liquid is 10m³, it is poured into the filter by a forced pump to remove 15Kg of acti...

Embodiment 2

[0023] Embodiment two, such as figure 2 Shown:

[0024] 1. Put 70m³ of sugar water and 10m³ of dichloromethane produced in the previous section into the mixer;

[0025] 2. After being mixed by the mixer, it enters the separator and separates 70.1 m³ of sugar water and 9.9 m³ of dichloromethane. Add 20Kg of activated carbon to the separated sugar water, fully circulate through the circulation pump, and heat to 70°C through the external heat exchanger , Evaporate 550L dichloromethane in sugar water.

[0026] 3. After the preheating treatment, the sugar-water suspension is poured into the MVR in 4 batches, and concentrated at 85°C. When the concentrate is 10m³, it is poured into the filter by a forced pump to remove activated carbon (35Kg);

[0027] 4. Put the filtrate into the freezer to freeze for about 1 hour. When the temperature is 10°C, shake the material. The weight of the dried product is 10.2-10.5T, and the measured organic impurities are 8-11ppm.

Embodiment 3

[0028] Embodiment three, such as figure 2 Shown:

[0029] 1. Put 70m³ of sugar water and 5m³ of dichloromethane produced in the previous section into the mixer;

[0030] 2. After being mixed by the mixer, it enters the separator and separates 70.1 m³ of sugar water and 4.9 m³ of dichloromethane. Add 20Kg of activated carbon to the separated sugar water, fully circulate through the circulation pump, and heat to 70°C through the external heat exchanger , Evaporate 550L dichloromethane in sugar water.

[0031] 3. After the preheating treatment, the sugar-water suspension is poured into the MVR in 4 batches, and concentrated at 85°C. When the concentrate is 10m³, it is poured into the filter by a forced pump to remove activated carbon (35Kg);

[0032] 4. Put the filtrate into the freezer to freeze for about 1 hour. When the temperature is 2°C, shake the material. The weight of the dried product is 10-10.4T, and the measured organic impurities are 9-12ppm.

[0033] compared to ...

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Abstract

The invention relates to an acesulfame optimized crystallization production process; the acesulfame optimized crystallization method comprises the steps: directly adding a certain amount of activatedcarbon into reversely extracted sweet water, mixing to form a turbid liquid sweet water state, directly carrying out MVR concentration with mixed sweet water, carrying out high-temperature filtrationon the concentrated solution, freezing, crystallizing and drying to obtain a finished product. The production process has the advantages that a novel optimized crystallization process is adopted, so that the production operation is simplified, the operation flow is shortened, the labor intensity of workers is reduced, and the freezing load is reduced; compared with an original traditional production process, the production process has the advantages of optimizing new crystal crystallization, removal, heat dissolution, decolorizing, freezing and other operations, simplifying the operation, shortening the flow, reducing the labor intensity, saving a large amount of electricity and steam, and improving the product quality.

Description

Technical field: [0001] The invention relates to an optimized crystallization method of acesulfame potassium. Background technique: [0002] In the traditional production process of acesulfame potassium, crystallization such as figure 1 As shown, after the sugar water is mixed and extracted with dichloromethane (DCM) in the mixer, the treated mixed solution (sugar water) is layered through the separator, and the upper layer of light phase sugar water is heat-treated to remove the residual DCM (return to the rectification tower). The sugar water is concentrated by MVR, and the concentrated solution is refrigerated and centrifuged to obtain crude sugar. The crude sugar is then thermally dissolved by adding activated carbon and water, mixed, decolorized, decolorized and filtered, and then frozen, crystallized and centrifuged for the second time to obtain the finished sugar. Because it is intermittent production, the process is long, manual operation, repeated thermal dissoluti...

Claims

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Application Information

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IPC IPC(8): C07D291/06
CPCC07D291/06
Inventor 周睿沈孝峰陈永旭杨池兵
Owner ANHUI JINGHE IND
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