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Method for preparing acesulfame potassium

A technology of acesulfame potassium and acesulfame potassium, which is applied in the field of preparation of acesulfame potassium, to achieve the effect of increasing the color value of the product, reducing the content of organic impurities, and reducing the decomposition

Pending Publication Date: 2022-01-04
NANTONG ACETIC ACID CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Stress on acesulfame potassium and acesulfame H may lead to degradation of these compounds, especially acesulfame H, resulting in the formation of undesired impurities, e.g., acetoacetamide and acetoacetamide-N-sulfonate Acids, or other impurities that may form

Method used

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  • Method for preparing acesulfame potassium
  • Method for preparing acesulfame potassium
  • Method for preparing acesulfame potassium

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Using dichloromethane as solvent, sulfamic acid is neutralized with triethylamine, and the prepared solution is acylated with diketene to obtain DKA (acetoacetamide-N-sulfonate) solution. 20% SO 3 Solution and 35% DKA solution are introduced into the input end of the cyclization reactor, and the material after the cyclization reaction is directly sprayed into the hydrolysis reactor at the outlet of the reactor to carry out a hydrolysis reaction with a certain amount of water; after the hydrolysis reaction is completed, the sulfuric acid in the acid layer The content of ACH in the acid layer is 45%, and the content of ACH in the acid layer is 2.2%; the residence time of the hydrolyzate in the hydrolysis reactor is 40min, and the content of ACH in the acid does not change. After extraction and neutralization, a crude acesulfame potassium composition was obtained with a color value of 8.3 Hazen, and then refined acesulfame potassium product was obtained through evaporation...

Embodiment 2

[0065] Using dichloromethane as solvent, sulfamic acid is neutralized with triethylamine, and the prepared solution is acylated with diketene to obtain DKA (acetoacetamide-N-sulfonate) solution. 30% SO 3 Solution and 25% DKA solution are introduced into the input end of the cyclization reactor, and the material after the cyclization reaction is directly sprayed into the hydrolysis reactor at the outlet of the reactor to carry out a hydrolysis reaction with a certain amount of water; after the hydrolysis reaction is completed, the sulfuric acid in the acid layer The content of ACH in the acid layer is 60%, and the content of ACH in the acid layer is 2.8%; the residence time of the hydrolyzate in the hydrolysis reactor is 25 minutes, and the content of ACH in the acid does not change. After extraction and neutralization, a crude acesulfame potassium composition was obtained, with a color value of 8.5 Hazen, and then evaporated, concentrated, decolorized, and recrystallized to ob...

Embodiment 3

[0067] Using dichloromethane as solvent, sulfamic acid is neutralized with triethylamine, and the prepared solution is acylated with diketene to obtain DKA (acetoacetamide-N-sulfonate) solution. 40% SO 3 solution and 30% DKA solution are introduced into the input end of the cyclization reactor, and the material after the cyclization reaction is directly sprayed into the hydrolysis reactor at the outlet of the reactor to carry out a hydrolysis reaction with a certain amount of water; after the hydrolysis reaction is completed, the sulfuric acid in the acid layer The content of ACH in the acid layer is 50%, and the ACH content in the acid layer is 2.5%; the residence time of the hydrolyzate in the hydrolysis reactor is 35 minutes, and the ACH content in the acid does not change. After extraction and neutralization, a crude acesulfame potassium composition was obtained, with a chromaticity value of 8.1 Hazen, and then evaporated, concentrated, decolorized, and recrystallized to o...

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Abstract

The invention relates to a method for preparing acesulfame potassium. The method effectively reduces the decomposition of ACH, reduces the content of organic impurities in an acesulfame potassium finished product and improves the chromatic value of the product by controlling the content of ACH in a hydrolysis reaction acid layer and the retention time of a hydrolysis reaction solution.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing acesulfame potassium. Background technique [0002] Acesulfame potassium, the chemical name is 6-methyl-1,2,3-thiazin-4(3)-one-2,2-potassium dioxide, commonly known as acesulfame potassium, AK sugar (Acesulfame-K). Because acesulfame potassium has the advantages of safety, non-toxicity, stable property, refreshing sweet taste, no bad aftertaste, and reasonable price, it is one of the most stable sweeteners in the world at present. It is used in food, medicine, etc. sweetener. [0003] In a conventional acesulfame potassium production process, sulfamic acid is reacted with an amine (eg, triethylamine) to form an ammonium sulfamate. The ammonium sulfamate is then reacted with diketene to form the acesulfame triethylamine salt. Acesulfame potassium is cyclized, hydrolyzed and neutralized to form acesulfame potassium. The patent application number...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D291/06
CPCC07D291/06
Inventor 庆九俞新南朱小刚刘芳
Owner NANTONG ACETIC ACID CHEM
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