Method of producing xylylenediamine
    21.
    发明授权
    Method of producing xylylenediamine 有权
    产生苯二甲胺的方法

    公开(公告)号:US07465832B2

    公开(公告)日:2008-12-16

    申请号:US11749787

    申请日:2007-05-17

    IPC分类号: C07C209/48

    CPC分类号: C07C209/48 C07C211/27

    摘要: A method of producing xylylenediamine of the present invention includes the steps of: subjecting a liquid mixture of phthalonitriles with liquid ammonia or a mixture of liquid ammonia and an organic solvent to a first catalytic hydrogenation treatment, thereby hydrogenating the phthalonitriles to obtain a reaction product (A), wherein a content of the liquid ammonia or the mixture of liquid ammonia and an organic solvent is 80 wt % or more; removing the liquid ammonia in the reaction product (A) to obtain a reaction product (B); subjecting the reaction product (B) to a second catalytic hydrogenation treatment, thereby hydrogenating cyanobenzylamine to obtain a reaction product (C); and distilling the reaction product (C) to purify xylylenediamine.

    摘要翻译: 本发明的苯二甲胺的制造方法包括以下步骤:将液氨或液态氨与有机溶剂的混合液的酞腈液进行第一次催化氢化处理,氢化二氯腈得到反应产物( A),其中液氨或液氨和有机溶剂的混合物的含量为80重量%以上; 除去反应产物(A)中的液氨,得到反应产物(B); 使反应产物(B)进行第二催化氢化处理,由此氢化氰基苄胺得到反应产物(C); 并蒸馏反应产物(C)以净化苯二甲胺。

    Classification tree based information retrieval scheme
    23.
    发明授权
    Classification tree based information retrieval scheme 失效
    基于分类树的信息检索方案

    公开(公告)号:US06363375B1

    公开(公告)日:2002-03-26

    申请号:US09410146

    申请日:1999-09-30

    IPC分类号: G06F1730

    摘要: An information retrieval scheme using classification trees with respect to a plurality of information sources connected to a network is disclosed, where each classification tree having a hierarchical structure defined in terms of entries. In the information retrieval apparatus, classification tree class information for each classification tree class defined among entries constituting each classification tree is managed, where each classification tree class information indicating retrieval condition parameters for each classification tree class. Then, the information retrieval is controlled by receiving from a user a retrieval request indicating a retrieval target entry that was obtained by the user by tracing the classification trees, generating retrieval commands with respect to selected information sources among said plurality of information sources by referring to each classification tree class information corresponding to the retrieval target entry that is managed by the class definition unit, obtaining a retrieval result of a retrieval with respect to the selected information sources using the retrieval commands, and returning the retrieval result to the user.

    摘要翻译: 公开了使用关于连接到网络的多个信息源的分类树的信息检索方案,其中每个分类树具有根据条目定义的分层结构。 在信息检索装置中,对构成每个分类树的条目中定义的每个分类树类的分类树类信息进行管理,其中每个分类树类信息指示每个分类树类的检索条件参数。 然后,通过从用户接收指示由用户通过跟踪分类树获得的检索目标条目的检索请求来控制信息检索,通过参考所述多个信息源中的所选信息源生成关于所选信息源的检索命令 每个分类树类信息对应于由类定义单元管理的检索目标条目,使用检索命令获得关于所选择的信息源的检索的检索结果,并将检索结果返回给用户。