Acesulfame potassium compositions and processes for producing same

Patent metadata

Field	Value
Publication number	US-11724993-B2
Application number	US-202117206208-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

Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of forming a cyclic sulfur trioxide adduct; hydrolyzing the cyclic sulfur trioxide adduct to form an acesulfame-H composition comprising acesulfame-H; neutralizing the acesulfame-H in the acesulfame-H composition to form a crude acesulfame potassium composition comprising acesulfame potassium and less than 2800 wppm acetoacetamide-N-sulfonic acid, wherein the neutralizing step is conducted or maintained at a pH at or below 11.0; and treating the crude acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 37 wppm acetoacetamide-N-sulfonic acid.

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, and less than 2800 wppm acetoacetamide-N-sulfonic acid.

2. The crude acesulfame potassium composition of claim 1 , further comprising 0.001 wppm to 5 wppm organic impurities and/or 0.001 wppm to 5 wppm of at least one heavy metal.

3. The crude acesulfame potassium composition of claim 2 , wherein the at least one heavy metal is selected from the group consisting of mercury, lead and mixtures thereof.

4. The crude acesulfame potassium composition of claim 3 , wherein the mercury is present in an amount of 1 wppb to 20 wppm.

5. The crude acesulfame potassium composition of claim 3 , wherein the lead is present in an amount of 1 wppb to 25 wppm.

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

7. The crude acesulfame potassium composition of claim 1 , wherein the crude acesulfame potassium composition comprises from 20 wppm to 2500 wppm acetoacetamide-N-sulfonic acid.

8. The crude acesulfame potassium composition of claim 1 , wherein the crude acesulfame potassium composition comprises from 500 wppm to 2375 wppm acetoacetamide-N-sulfonic acid.

9. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises less than 2800 ppm acetoacetamide.

10. The crude acesulfame potassium composition of claim 1 , wherein the crude acesulfame potassium composition comprises from 20 wppm to 2500 wppm acetoacetamide.

11. The crude acesulfame potassium composition of claim 2 , wherein the organic impurities are present in an amount of from 1 wppm to 25 wppm.

12. The crude acesulfame potassium composition of claim 2 , wherein the organic impurities include acetoacetamide, acetoacetamidesulfonate, acetoacetamide-N-sulfonic acid, or a combination thereof.

13. The crude acesulfame potassium composition of claim 1 , wherein the composition comprises a cyclizing agent/solvent reaction product.

14. The crude acesulfame potassium composition of claim 13 , wherein the cyclizing agent/solvent reaction product is formed from the reaction of sulfur trioxide and dichloromethane.

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

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

17. The crude acesulfame potassium composition of claim 16 , wherein the unreacted neutralizing agent includes potassium hydroxide.

18. 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