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    Process for producing a high purity caprolactam
    94.
    发明授权
    Process for producing a high purity caprolactam 失效
    生产高纯度己内酰胺的方法

    公开(公告)号：US5459261A

    公开(公告)日：1995-10-17

    申请号：US289577

    申请日：1994-08-15

    Applicant: Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

    Inventor： Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

    IPC: C07D201/16 ,  C07D201/14

    CPC classification number: C07D201/16

    Abstract: A process for producing a high purity caprolactam is disclosed in which a crude caprolactam obtained by a catalytic rearrangement of cyclohexanone oxime is subjected(1) to mixing, while stirring, with at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons to form a liquid-liquid, two-layer liquid mixture, and then crystallizing caprolactam out of the liquid mixture;(2) to mixing with both at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons, and water to form a liquid mixture, separating the liquid mixture into a hydrocarbon layer and a water layer, and then recovering caprolactam from the water layer; or(3) to distillation in the co-presence of at least one aliphatic saturated hydrocarbon of 10 to 18 carbon atoms.

    Abstract translation: 公开了一种制备高纯度己内酰胺的方法，其中通过环己酮肟的催化重排获得的粗己内酰胺在搅拌下与至少一种选自脂族烃和脂环族烃的烃进行混合 形成液 - 液两层液体混合物，然后从该液体混合物中结晶己内酰胺; （2）与选自脂族烃和脂环烃的至少一种烃和水混合以形成液体混合物，将液体混合物分离成烃层和水层，然后从其中回收己内酰胺 水层; 或（3）在至少一种10至18个碳原子的脂族饱和烃的共存下进行蒸馏。

    Process for preparing N-alkyl-lactams
    96.
    发明授权
    Process for preparing N-alkyl-lactams 失效
    制备N-烷基 - 内酰胺的方法

    公开(公告)号：US3975377A

    公开(公告)日：1976-08-17

    申请号：US562905

    申请日：1975-03-28

    Applicant: Claude Poulain

    Inventor： Claude Poulain

    IPC: C07D201/16 ,  C07D201/14

    CPC classification number: C07D201/16

    Abstract: A process for preparing pure N-alkyl-lactams obtained by the reaction, in an organic solvent medium of, the corresponding lactamate of an alkali metal and an alkyl halide. This process consists of treating a reactive mixture of N-alkyl-lactam containing the corresponding cyclo-alkylene imine as an impurity with a current of carbon dioxide, until the cyclo-alkylene imine precipitates completely in the form of an insoluble carbonate, and then separating it from the precipitate.

    Abstract translation: 通过在相应的碱金属和烷基卤的乳酸盐的有机溶剂介质中通过反应制备纯N-烷基 - 内酰胺的方法。 该方法包括将含有作为杂质的相应环 - 亚烷基亚胺的N-烷基 - 内酰胺的反应性混合物与二氧化碳的电流进行处理，直到环 - 亚烷基亚胺完全沉淀为不溶性碳酸酯的形式，然后分离 它从沉淀中。

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