申请人:CELANESE INTERNATIONAL CORPORATION
公开号:US20180079734A1
公开(公告)日:2018-03-22
Compositions and processes for producing high purity acesulfame potassium are described. One process comprises the steps of providing a crude acesulfame potassium composition comprising acesulfame potassium and acetoacetamide, concentrating the crude acesulfame potassium composition to form a water stream and an intermediate acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide, and separating the intermediate acesulfame potassium composition to form the finished acesulfame potassium composition comprising acesulfame potassium and less than 33 wppm acetoacetamide. The concentrating step is conducted at a temperature below 90° C. and the separating step is conducted at a temperature at or below 35° C.
描述了生产高纯度乙酰磺酸钾的组合物和工艺。其中一种工艺包括以下步骤:提供含有乙酰磺酸钾和乙酰乙酰胺的粗乙酰磺酸钾组合物,浓缩粗乙酰磺酸钾组合物以形成水流和含有乙酰磺酸钾和少于33 wppm乙酰乙酰胺的中间乙酰磺酸钾组合物,分离中间乙酰磺酸钾组合物以形成成品乙酰磺酸钾组合物,其中成品乙酰磺酸钾组合物含有乙酰磺酸钾和少于33 wppm乙酰乙酰胺。浓缩步骤在90°C以下的温度下进行,分离步骤在35°C或以下的温度下进行。