Process for producing acesulfame potassium

摘要

In one embodiment, the invention relates to processes for producing acesulfame potassium. In one embodiment, the process comprises the step of reacting a first reaction mixture to form an amidosulfamic acid salt such as a trialkyl ammonium amidosulfamic acid salt. The first reaction mixture comprises sulfamic acid, an amine, and smaller amounts, if any, acetic acid, e.g., less than 1 wt % (10000 wppm). In terms of ranges, the first reaction mixture may comprise from 1 wppm to 1 wt % acetic acid. The process further comprises the step of reacting the amidosulfamic acid salt with diketene to form an acetoacetamide salt. In preferred embodiments, the amidosulfamic acid salt formation reaction is conducted at pH levels from 5.5 to 7.0. The process further comprises the step of deriving the acesulfame-K from the acetoacetamide salt.

主权项

1. A process for producing acesulfame potassium, the process comprising the steps of:
(a) reacting a first reaction mixture comprising:
sulfamic acid,an amine, andfrom 1 wppm to 1 wt % wppm acetic acid to form an amidosulfamic acid salt; (b) reacting the amidosulfamic acid salt with diketene to form an acetoacetamide salt; (c) deriving the acesulfame potassium from the acetoacetamide salt, wherein a molar ratio of acetic acid to sulfamic acid in the first reaction mixture is less than 0.095:1.