Acesulfame potassium compositions and processes for producing same

Patent metadata

Field	Value
Publication number	US-11724994-B2
Application number	US-202117206230-A
Country	US
Kind code	B2
Filing date	Mar 19, 2021
Priority date	Sep 21, 2016
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.

First claim

We claim:

1. A crude acesulfame potassium composition,
wherein the composition is in the form of an aqueous phase that comprises at least 5 wt. % acesulfame potassium, a halogenated aliphatic hydrocarbon solvent, water, and less than 39 wppm 5-chloro-acesulfame potassium.

2. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises at least 90 wt. % acesulfame potassium.

3. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises from 1 wppb to 39 wppm of 5-chloro-acesulfame potassium.

4. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises from 1 wppb to 33 wppm of 5-chloro-acesulfame potassium.

5. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises from 1 wppb to 25 wppm of 5-chloro-acesulfame potassium.

6. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises from 1 wppb to 10 wppm of 5-chloro-acesulfame potassium.

7. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises from 1 wppb to 5 wppm of 5-chloro-acesulfame potassium.

8. The crude acesulfame potassium composition of claim 1 , further comprising organic impurities.

9. The crude acesulfame potassium composition of claim 8 , wherein the organic impurities are present in an amount of from 1 wppm to 25 wppm.

10. The crude acesulfame potassium composition of claim 8 , wherein the organic impurities include acetoacetamide, acetoacetamidesulfonate, acetoacetamide-N-sulfonic acid, or a combination thereof.

11. The crude acesulfame potassium composition of claim 1 , further comprising heavy metal impurities.

12. The crude acesulfame potassium composition of claim 11 , wherein the heavy metal impurities are present in an amount of from 1 wppb to 25 wppm.

13. The crude acesulfame potassium composition of claim 11 , wherein the heavy metal impurities include mercury, lead, or a combination thereof.

14. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises less than 1 wt. % of a cyclizing agent/solvent reaction product.

15. The crude acesulfame potassium composition of claim 14 , wherein the composition comprises from 10 wppm to 0.25 wt. % of the cyclizing agent/solvent reaction product.

16. The crude acesulfame potassium composition of claim 14 , wherein the cyclizing agent/solvent reaction product is formed from the reaction of sulfur trioxide and dichloromethane.

17. The crude acesulfame potassium composition of claim 14 , wherein the cyclizing agent/solvent reaction product includes chloromethyl, chlorosulfate, methyl-bis-chlorosulfate, or a combination thereof.

18. The crude acesulfame potassium composition of claim 1 , wherein the halogenated aliphatic hydrocarbon solvent comprises dichloromethane.

19. The crude acesulfame potassium composition of claim 1 , further comprising an unreacted neutralizing agent.

20. The crude acesulfame potassium composition of claim 19 , wherein the unreacted neutralizing agent includes potassium hydroxide.

21. An intermediate acesulfame potassium composition comprising a concentrated form of the crude acesulfame composition of claim 1 , wherein the intermediate composition comprises at least 10 wt. % acesulfame potassium and is free of water.

Assignees

• Celanese Int Corp

Inventors

• Mollenkopf Christoph
• Groer Peter
• Yadav Arvind

Classifications

• C07D291/06 Primary

  Six-membered rings · CPC title

• A23L27/30

  Artificial sweetening agents · CPC title

• A23L27/31

  containing amino acids, nucleotides, peptides or derivatives · CPC title

• A23V2002/00

  Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title