ACESULFAME POTASSIUM COMPOSITIONS AND PROCESSES FOR PRODUCING SAME
First Claim
1. A process for producing a finished acesulfame potassium composition, the process comprising the steps of:
- (a) contacting a cyclizing agent and a solvent selected from the group consisting of halogenated aliphatic hydrocarbons, esters of carbonic acid with lower aliphatic alcohols, nitroalkanes, alkyl-substituted pyridines, aliphatic sulfones, acetone, acetic acid, and dimethylformamide to form a cyclizing agent composition;
(b) reacting an acetoacetamide salt with the cyclizing agent in the cyclizing agent composition to form a cyclic sulfur trioxide adduct; and
(c) forming from the cyclic sulfur trioxide adduct the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 35 wppm 5-chloro-acesulfame potassium;
wherein contact time from the beginning of step (a) to the beginning of step (b) is less than 60 minutes.
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Accused Products
Abstract
Improved processes for producing high purity acesulfame potassium. In one embodiment, the process comprises the steps of contacting a solvent, e.g., dichloromethane, and a cyclizing agent, e.g., sulfur trioxide, to form a cyclizing agent composition and reacting an acetoacetamide salt with the cyclizing agent in the composition to form a cyclic sulfur trioxide adduct. The contact time is less than 60 minutes. The process also comprises forming from the cyclic sulfur trioxide adduct composition a finished acesulfame potassium composition comprising non-chlorinated, e.g., non-chlorinated, acesulfame potassium and less than 35 wppm 5-halo acesulfame potassium, preferably less than 5 wppm.
6 Citations
40 Claims
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1. A process for producing a finished acesulfame potassium composition, the process comprising the steps of:
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(a) contacting a cyclizing agent and a solvent selected from the group consisting of halogenated aliphatic hydrocarbons, esters of carbonic acid with lower aliphatic alcohols, nitroalkanes, alkyl-substituted pyridines, aliphatic sulfones, acetone, acetic acid, and dimethylformamide to form a cyclizing agent composition; (b) reacting an acetoacetamide salt with the cyclizing agent in the cyclizing agent composition to form a cyclic sulfur trioxide adduct; and (c) forming from the cyclic sulfur trioxide adduct the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 35 wppm 5-chloro-acesulfame potassium; wherein contact time from the beginning of step (a) to the beginning of step (b) is less than 60 minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification