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Treatment and utilization method of acesulfame potassium crystallization waste liquid

Acesulfame K and crystallization technology, applied in water/sewage treatment, natural water treatment, chemical instruments and methods, etc., can solve the problems of low purity of potassium salt crude products and unresolved organic impurities, etc., to reduce material consumption, The effect of reducing production costs and reducing pollution

Inactive Publication Date: 2020-08-11
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this technology does not consider the influence of components such as sulfamate and AK sugar by-products in the crystallization mother liquor, the purity of the obtained potassium salt crude product is not high and requires recrystallization to obtain a relatively pure potassium salt product, while the original crystallization mother liquor extracts potassium The remaining waste liquid after salting (containing sulfamate and AK sugar by-products and other components) needs to be treated, and the recrystallization of impure potassium salt also produces secondary mother / waste liquid
Therefore, this technology only utilizes the potassium resources in it, and does not solve the problem of organic impurities in it, but will produce more secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 100mL of crystallization waste liquid in a 1000mL beaker, put it in a water bath at 40°C, and slowly add 20mL of 50% hydrogen peroxide while stirring. After the addition, a large number of bubbles are generated, and the temperature is naturally raised to above 90°C. After the reaction is completed, almost no bubbles emerge. After about 20 minutes, after cooling down, the solution has changed from dark brown before the reaction to about 110 mL of bright yellow transparent solution, and almost no organic components are detected by gas chromatography.

Embodiment 2

[0025] Take 100mL of crystallization waste liquid in a 1000mL beaker, in a water bath at 80°C, slowly add 10mL of 50% hydrogen peroxide while stirring, only a small amount of bubbles will be generated after the addition, keep it at 80°C for 2 hours, after cooling down, the color of the solution will deepen, and there is no other obvious The change.

Embodiment 3

[0027] Take 100mL of crystallization waste liquid in a 1000mL beaker, at room temperature 10°C, slowly add 20mL of 50% hydrogen peroxide while stirring. Above, after the reaction is completed, almost no bubbles emerge, about 20 minutes, after cooling down, the solution has changed from dark brown before the reaction to a bright yellow transparent solution of about 110mL.

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Abstract

The invention provides a treatment and utilization method of acesulfame potassium crystallization waste liquid. Crystallized waste liquid generated in the acesulfame potassium production process is subjected to hydrogen peroxide oxidation treatment, a faded solution only containing inorganic components is obtained, a potassium salt in the waste liquid can be conveniently utilized and can be used for a neutralization reaction in the acesulfame potassium production step to partially replace potassium hydroxide, and material consumption is reduced. Directly concentrating, crystallizing and dryingare carried out to obtain a potassium carbonate byproduct; the method can also be used for preparing other sylvite products. According to the method, the production cost of acesulfame potassium can be reduced, meanwhile, the amount of discharged wastewater can be greatly reduced, the content of potassium in the wastewater is reduced, the pollution of the wastewater to the environment is reduced,and the economic, social and environmental benefits of a process for producing acesulfame potassium by using a diketene-sulfamic acid-sulfur trioxide method are improved.

Description

technical field [0001] The invention relates to a method for treating and utilizing chemical waste liquid, in particular to oxidation treatment of crystallization waste liquid produced in the production process of acesulfame potassium, and a method for utilizing potassium salt in the waste liquid. Background technique [0002] Acesulfame potassium, also known as AK sugar, chemical name is acesulfame potassium, full name 6-methyl-2,2-dioxo-1,2,3-oxathiazepine-4-cyclohexenone potassium salt , the English name is Acesulfame Potassium (Acesulfame K), referred to as ASK. It is produced with diketene, sulfamic acid, triethylamine and sulfur trioxide as the main raw materials. It has the advantages of easy access to raw materials, mild reaction conditions, high yield, low cost, and good product quality. Now most acesulfame K All manufacturers use this method. Its production process includes the following steps: (1) Preparation of acetoacetylsulfamate: suspending sulfamic acid and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D291/06C02F1/72C01D7/24C01D5/02C01D3/06C02F103/36C02F101/10
CPCC07D291/06C02F1/725C02F1/722C01D7/24C01D5/02C01D3/06C01P2006/80C02F2103/36C02F2101/10
Inventor 赵金刚陈朝晖罗艺飞郑学连
Owner ANHUI JINGHE IND
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