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Acesulfame potassium compositions and processes for producing same

A technology of acesulfame potassium and acesulfame potassium, applied in the field of producing acesulfame potassium and producing high-purity acesulfame potassium, can solve problems such as consumer dissatisfaction, inability to meet standards, difficulties and the like

Pending Publication Date: 2018-03-20
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Removal of many of these impurities using standard purification procedures such as evaporation, crystallization, and / or filtration has proven difficult, resulting in consumer dissatisfaction and failure to meet standards

Method used

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  • Acesulfame potassium compositions and processes for producing same
  • Acesulfame potassium compositions and processes for producing same
  • Acesulfame potassium compositions and processes for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0212] Example 1: Evaporation / Crystallization

[0213] The first portion of the crude acesulfame potassium composition was evaporated in a rotary evaporator at 45°C and under reduced pressure for approximately 20 minutes. Thus, approximately 50% of the water was evaporated from the crude acesulfame potassium composition. After removal of the water, the lower acesulfame potassium composition remains. The acesulfame potassium intermedia composition is then isolated, eg, cooled to 5°C in a refrigerator.

[0214] Cooling resulted in the precipitation of crude crystals consisting mainly of acesulfame potassium. These crude crystals are believed to be the refined acesulfame potassium composition. Crude crystals were separated from liquid and analyzed for yield and impurities (eg, acetoacetamide). Testing for acetoacetamide (AAA) content was performed using the HPLC equipment and techniques discussed herein. Specifically, HPLC analysis was performed using an LC system HPLC unit ...

Embodiment 2 and comparative Embodiment B-D

[0230] The effect of temperature and pH on the degradation of acesulfame potassium composition during treatment was also explored. Acesulfame potassium was diluted with sufficient water to form a 16% aqueous solution. The aqueous solution was divided into portions (Example 2 and Comparative Examples B-D). These portions of the aqueous solution (except Example 2) were heated under reflux condensation to simulate a concentration operation. In Comparative Example D, a small amount of 10% potassium hydroxide was added to each portion of the aqueous solution prior to heating, which brought the resulting solution pH to approximately 9.8. For each fraction, crystals (acesulfame intermedia potassium composition) were removed from the remaining liquid (after heating) and impurities formed via degradation (eg, acetoacetamide-N-sulfonic acid (AAA-NSH) ) for analysis. Testing for acetoacetamide-N-sulfonic acid content was performed using the HPLC equipment and techniques discussed abov...

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Abstract

Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of providing a crude acesulfame potassium composition comprising acesulfame potassium and acetoacetamide, concentrating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium and lessthan 33 wppm acetoacetamide, and separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide. The concentrating step is conducted at a temperature below 90DEG C. and the separating step is conducted at a temperature at or below 35DEG C.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This patent application is related to and claims priority to US Provisional Patent Application No. 62 / 397,509, filed September 21, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention generally relates to acesulfame potassium and methods for producing acesulfame potassium. More specifically, the present invention relates to a method for producing high purity acesulfame potassium. Background technique [0004] Acesulfame potassium has a strong sweet taste and has been used as a sweetener in many food-related applications. In conventional acesulfame potassium production methods, sulfamic acid is reacted with an amine (eg, triethylamine) to form an amidosulfamic acid salt (eg, ammonium sulfamic acid of trialkylammonium) Salt). The ammonium sulfamate is then reacted with the diketene to form the acetoacetamide salt. The acetoacetamide salt can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D291/06
CPCC07D291/06
Inventor C·莫伦科普夫P·格勒尔A·亚达夫
Owner CELANESE INT CORP
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