利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

103 条记录 (耗时 0.02 秒)

    REFINING METHOD FOR ACESULFAME
    54.
    发明公开
    REFINING METHOD FOR ACESULFAME 审中-公开

    公开(公告)号：EP4206190A1

    公开(公告)日：2023-07-05

    申请号：EP20953772.9

    申请日：2020-09-21

    申请人： Anhui Jinhe Industrial Co., Ltd.

    发明人： WANG, Congchun ,  CHEN, Yongxu ,  SHEN, Xiaofeng ,  CHEN, Chaohui ,  SHEN, Dongdong

    IPC分类号： C07D291/06

    摘要： Provided is a method for refining acesulfame potassium (Ace K), including: adding hydrogen peroxide and activated carbon to an Ace K crude product-containing solution to obtain a mixture, maintaining the mixture at a first preset temperature for a first preset time, and filtering the mixture to obtain an Ace K mother liquor; conducting concentration on the Ace K mother liquor to a preset concentration to obtain a concentrated solution, allowing the concentrated solution to stand at a second preset temperature for a second preset time to form an Ace K crystal nucleus, and obtaining a crystal nucleus-containing solution; conducting programmed freezing on the crystal nucleus-containing solution to obtain a solution with a large number of Ace K crystals; and conducting centrifugation, water washing, and drying on the solution with a large number of Ace K crystals to obtain an Ace K crystal product. The present disclosure has the following beneficial effects: by controlling crystallization process and technology, a high-quality and high-purity crystallization product is obtained with a less impurity content, and purity and quality of the Ace K crystal are significantly improved; moreover, the method for refining Ace K has a simple process, mild and controllable conditions, and low requirements for equipment and personnel skills, which is extremely suitable for large-scale industrial production.

    ACESULFAME POTASSIUM COMPOSITIONS AND PROCESSES FOR PRODUCING SAME
    57.
    发明公开
    ACESULFAME POTASSIUM COMPOSITIONS AND PROCESSES FOR PRODUCING SAME 审中-公开

    公开(公告)号：EP3319949A1

    公开(公告)日：2018-05-16

    申请号：EP17772252.7

    申请日：2017-09-14

    申请人： Celanese International Corporation

    发明人： MOLLENKOPF, Christoph ,  GROER, Peter ,  YADAV, Arvind

    IPC分类号： C07D291/06

    摘要： 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.

    PROCESS FOR PRODUCING ACESULFAME POTASSIUM
    58.
    发明公开
    PROCESS FOR PRODUCING ACESULFAME POTASSIUM 审中-公开
    生产ACESULFAME POTASSIUM的方法

    公开(公告)号：EP3210978A1

    公开(公告)日：2017-08-30

    申请号：EP17151405.2

    申请日：2013-06-06

    申请人： Celanese Sales Germany GmbH

    发明人： Bayer, Michael J. ,  Brietzke, Stephan ,  Groer, Peter ,  Mollenkopf, Christoph

    IPC分类号： C07D291/06 ,  C07C307/02 ,  A23L27/30

    CPC分类号： A23L1/236 ,  A23L27/30 ,  C07C307/02 ,  C07D291/06

    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.

    摘要翻译： 在一个实施方案中，本发明涉及生产乙酰磺胺酸钾的方法。 在一个实施方案中，该方法包括使第一反应混合物反应以形成氨基磺酸氨基磺酸盐如三烷基铵氨基磺酸盐的步骤。 第一反应混合物包含氨基磺酸，胺和少量（如果有的话）乙酸，例如少于1重量％（10000wppm）。 就范围而言，第一反应混合物可以包含1wppm至1wt％的乙酸。 该方法还包括使氨基磺酸氨基磺酸盐与双烯酮反应以形成乙酰乙酰胺盐的步骤。 在优选的实施方案中，酰胺基氨基磺酸盐形成反应在5.5至7.0的pH水平下进行。 该方法还包括从乙酰乙酰胺盐衍生乙酰磺胺酸钾的步骤。