公开(公告)号：US5534655A

公开(公告)日：1996-07-09

申请号：US392508

申请日：1995-02-23

申请人： Yoshihiko Kambara ,  Yoshikazu Uehara ,  Takeya Abe ,  Koichi Asao

发明人： Yoshihiko Kambara ,  Yoshikazu Uehara ,  Takeya Abe ,  Koichi Asao

IPC分类号： C07C231/06 ,  C07C231/24

CPC分类号： C07C231/065 ,  C07C231/24

摘要： A process for preparing acrylamide is disclosed herein which comprises subjecting acrylonitrile to a hydration reaction in the presence of a copper-based catalyst, said process comprising the step of allowing a compound having an active methylene group and an acidic group in one molecule or a salt of the compound, for example, malonic acid, cyanoacetic acid or its salt to be present in a reaction system. According to the hydration reaction, it is possible to inhibit the secondary formation of impurities which cannot be heretofore removed, without any deterioration of a catalyst activity, and acrylamide can be obtained which is useful as a material for the manufacture of a high-molecular weight flocculant having a sufficiently large molecular weight and a good water solubility.

摘要翻译： 本文公开了一种制备丙烯酰胺的方法，其包括在铜基催化剂存在下使丙烯腈进行水合反应，所述方法包括使一分子中具有活性亚甲基和酸性基团的化合物或盐 的化合物，例如丙二酸，氰基乙酸或其盐存在于反应体系中。 根据水合反应，可以抑制不可能除去的杂质的二次形成，而不会降低催化剂活性，并且可以获得丙烯酰胺，其可用作制备高分子量的材料 絮凝剂具有足够大的分子量和良好的水溶性。

公开(公告)号：US5476883A

公开(公告)日：1995-12-19

申请号：US274453

申请日：1994-07-13

申请人： Takeya Abe ,  Yoshihiko Kambara

发明人： Takeya Abe ,  Yoshihiko Kambara

IPC分类号： C07C231/06 ,  C08L77/00 ,  C08L23/26

CPC分类号： C07C231/06 ,  C07C231/065

摘要： This invention provides a process for the preparation of acrylamide. Acrylonitrile is treated through at least two purification steps in which acrylonitrile is brought into contact with a strongly-acidic cation exchange resin and then with a resin having primary and/or secondary amino groups or with activated carbon. The resulting acrylonitrile is subjected to hydration in the presence of a copper-base catalyst. The process of this invention can provide high-quality acrylamide even when acrylonitrile of ordinary quality is used, and permits preparation of a polyacrylamide suitable for use in the production of a coagulant having good water solubility or the like.

摘要翻译： 本发明提供了制备丙烯酰胺的方法。 通过至少两个纯化步骤处理丙烯腈，其中丙烯腈与强酸性阳离子交换树脂接触，然后与具有伯和/或仲氨基或活性炭的树脂接触。 所得丙烯腈在铜基催化剂存在下进行水合。 即使使用普通质量的丙烯腈，本发明的方法也可以提供高质量的丙烯酰胺，并且可以制备适用于生产具有良好的水溶性等的凝结剂的聚丙烯酰胺。