	US 11,718,594 B2
	Acesulfame potassium compositions and processes for producing same
Christoph Mollenkopf, Frankfurt am Main (DE); Peter Groer, Babenhausen (DE); and Arvind Yadav, Hessen (IN)
Assigned to Celanese International Corporation, Irving, TX (US)
Filed by Celanese International Corporation, Irving, TX (US)
Filed on Mar. 19, 2021, as Appl. No. 17/206,191.
Application 17/206,191 is a continuation of application No. 16/984,305, filed on Aug. 4, 2020, granted, now 10,954,203.
Application 16/984,305 is a continuation of application No. 16/684,692, filed on Nov. 15, 2019, granted, now 10,759,770, issued on Sep. 1, 2020.
Application 16/684,692 is a continuation of application No. 16/273,358, filed on Feb. 12, 2019, granted, now 10,590,095, issued on Mar. 17, 2020.
Application 16/273,358 is a continuation of application No. 16/014,431, filed on Jun. 21, 2018, granted, now 10,233,163, issued on Mar. 19, 2019.
Application 16/014,431 is a continuation of application No. 15/704,386, filed on Sep. 14, 2017, granted, now 10,029,999, issued on Jul. 24, 2018.
Claims priority of provisional application 62/397,509, filed on Sep. 21, 2016.
Prior Publication US 2021/0206733 A1, Jul. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C07D 291/06 (2006.01); A23L 27/30 (2016.01)

CPC C07D 291/06 (2013.01) [A23L 27/30 (2016.08); A23V 2002/00 (2013.01)]

17 Claims

1. A process for producing a finished acesulfame potassium composition, the process comprising the steps of:

(a) providing a crude acesulfame potassium composition comprising acesulfame potassium, acetoacetamide and water by a process comprising:

reacting sulfamic acid and an amine to form an amidosulfamic acid salt;

reacting the amidosulfamic acid salt and acetoacetylating agent to form an acetoacetamide salt;

reacting the acetoacetamide salt with cyclizing agent in the cyclizing agent composition to form the cyclic sulfur trioxide adduct;

hydrolyzing the cyclic sulfur trioxide adduct to form an acesulfame-H composition comprising acesulfame-H; and

neutralizing the acesulfame-H in the acesulfame-H composition to form the crude acesulfame potassium composition;

(b) evaporating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium, less than 75 wt. % water, and less than 33 wppm acetoacetamide; and

(c) separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium, less than 33 wppm acetoacetamide and less than 33 wppm acetoacetamide-N-sulfonic acid, wherein the weight percentage of acetoacetamide in the finished acesulfame potassium composition is less than the weight percentage of acetoacetamide in the crude acesulfame potassium composition;

wherein the evaporating step (b) is conducted at a temperature below 90° C., and wherein the separating step (c) is conducted at a temperature at or below 35° C.