公开(公告)号：WO2011073400A3

公开(公告)日：2011-06-23

申请号：PCT/EP2010/070097

申请日：2010-12-17

Applicant: DSM IP ASSETS B.V. ,  AVRAMESCU, Maria Elena ,  TINGE, Johan Thomas

Inventor： AVRAMESCU, Maria Elena ,  TINGE, Johan Thomas

IPC: C07D201/16

Abstract: The invention relates to a process for treating an aqueous solution containing ε-caprolactam, ammonium sulphate and one or more other impurities, comprising one or more organic impurities from a caprolactam production process and optionally other salts than ammonium sulphate, by means of a membrane process, thereby obtaining a retentate and a permeate, in which process the membrane used is selected from the group of polyether sulphone membranes, sulphonated polyether sulphone membranes, polyester membranes, polysulphone membranes, aromatic polyamide membranes, polyvinyl alcohol membranes, polypiperazine membranes, cellulose acetate membranes, titanium oxide membranes, zirconium oxide membranes and aluminium oxide membranes, having a molecular weight cut off in the range of 100-1000 g/mol; and wherein more than 60 wt.% of the caprolactam in the aqueous solution is passed through a membrane to the permeate side, to obtain a purified caprolactam containing permeate stream, and wherein at least 50 wt.% of the organic impurities are retained in the retentate solution.

公开(公告)号：EP2513050A2

公开(公告)日：2012-10-24

申请号：EP10795353.1

申请日：2010-12-17

Applicant: DSM IP Assets B.V.

Inventor： AVRAMESCU, Maria Elena ,  TINGE, Johan Thomas

IPC: C07D201/16

CPC classification number: C07D223/10 ,  C07D201/16

Abstract: The invention relates to a process for treating an aqueous solution containing ε-caprolactam, ammonium sulphate and one or more other impurities, comprising one or more organic impurities from a caprolactam production process and optionally other salts than ammonium sulphate, by means of a membrane process, thereby obtaining a retentate and a permeate, in which process the membrane used is selected from the group of polyether sulphone membranes, sulphonated polyether sulphone membranes, polyester membranes, polysulphone membranes, aromatic polyamide membranes, polyvinyl alcohol membranes, polypiperazine membranes, cellulose acetate membranes, titanium oxide membranes, zirconium oxide membranes and aluminium oxide membranes, having a molecular weight cut off in the range of 100-1000 g/mol; and wherein more than 60 wt.% of the caprolactam in the aqueous solution is passed through a membrane to the permeate side, to obtain a purified caprolactam containing permeate stream, and wherein at least 50 wt.% of the organic impurities are retained in the retentate solution.

Abstract translation: 本发明涉及一种处理含ε-己内酰胺，硫酸铵和一种或多种其它杂质的水溶液的方法，所述水溶液包含来自己内酰胺生产工艺的一种或多种有机杂质和任选的非硫酸铵以外的其它盐，借助膜工艺 从而获得渗余物和渗透物，其中使用的膜选自聚醚砜膜，磺化聚醚砜膜，聚酯膜，聚砜膜，芳族聚酰胺膜，聚乙烯醇膜，聚哌嗪膜，醋酸纤维素膜 ，氧化钛膜，氧化锆膜和氧化铝膜，其分子量在100-1000g / mol的范围内截断; 并且其中超过60重量％的所述水溶液中的己内酰胺通过膜到达渗透侧，以获得纯化的含有己内酰胺的渗透物流，并且其中至少50重量％的有机杂质保留在 滞留物解决方案。