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    Preparation process of aliphatic polyester
    4.
    发明公开
    Preparation process of aliphatic polyester 失效
    一种用于生产聚酯的α-纳粹过程

    公开(公告)号：EP0826711A3

    公开(公告)日：2000-09-13

    申请号：EP97114395.3

    申请日：1997-08-20

    申请人： MITSUI CHEMICALS, INC.

    发明人： Goto, Kenichi ,  Mori, Yukiko ,  Miyamoto, Michihiko

    IPC分类号： C08G63/06 ,  C08G63/12 ,  C08G63/81 ,  C08G63/60 ,  C08G63/16

    CPC分类号： C08G63/81 ,  C08G63/06 ,  C08G63/16 ,  C08G63/60

    摘要： The invention relates to a preparation process of aliphatic polyester, comprising using an ion exchange resin as a drying agent and after the dehydration polycondensation reaction, regenerating and drying the used ion exchange resin and repeatedly using said ion exchange resin in the next dehydration polycondensation reaction, in a process for preparing aliphatic polyester from one or more aliphatic compound (A) by heating in an organic solvent in the presence of a catalyst, distilling a generated water containing organic solvent out of the reaction system, treating the distilled organic solvent with a drying agent, and returning the treated solvent to the reaction system to progress a dehydration polycondensation reaction. The process of the invention enables to steadily and efficiently prepare in industry an aliphatic polyester having an excellent color tone, high molecular weight and high quality.

    Process for the preparation of nitroguanidine derivatives starting from 2-nitroimino-hexahydro-1,3,5-triazines in the presence of ammonia, primary or secondary amine
    6.
    发明公开
    Process for the preparation of nitroguanidine derivatives starting from 2-nitroimino-hexahydro-1,3,5-triazines in the presence of ammonia, primary or secondary amine 失效
    一种制备由2-硝基亚氨基六氢-1,3,5-三嗪在氨，伯胺或仲胺的存在下起始的硝基胍衍生物的方法

    公开(公告)号：EP0869120A1

    公开(公告)日：1998-10-07

    申请号：EP98105850.6

    申请日：1998-03-31

    申请人： MITSUI CHEMICALS, INC.

    发明人： Ebihara, Koichi ,  Ura, Daisuke ,  Miyamoto, Michihiko ,  Kaiho, Tatsuo

    IPC分类号： C07D213/61 ,  C07D277/32 ,  C07D307/14

    CPC分类号： C07D277/32 ,  C07D407/06 ,  C07D417/06

    摘要： Described is a convenient process, as a substitute for hydrolysis, for preparing a nitroguanidine derivative represented by the following formula (2):
    wherein A represents a substituted or unsubstituted aromatic or non-aromatic hydrocarbon ring, a substituted or unsubstituted aromatic or non-aromatic heterocycle, a hydrogen atom or a substituted or unsubstituted alkyl, alkenyl or alkynyl group; and R 2 represents a hydrogen atom, a substituted or unsubstituted C 1-6 alkyl, alkenyl or alkynyl group, which comprises reacting a compound represented by the following formula (1):
    wherein R 1 represents a substituted or unsubstituted, linear or cyclic C 1-10 alkyl group and A and R 2 have the same meanings as defined above, with ammonia, a primary amine or a secondary amine, or a salt thereof.

    摘要翻译： 描述的是一个方便的方法中，作为用于水解的替代物，用于制备由下式表示的硝基胍衍生物（2）： worin甲darstellt一个substituiertem奥德unsubstituiertem芳族或非芳族烃环，substituiertem奥德unsubstituiertem芳族或 非芳族杂环，氢原子或substituiertem奥德unsubstituiertem烷基，烯基或炔基; 和R2 darstellt一个氢原子，substituiertem奥德unsubstituiertem C 1-6烷基，烯基或炔基，该方法包括使由下式表示的化合物（1）： worin R1 darstellt一个substituiertem奥德unsubstituiertem，直链或环状的C1 -10烷基以及A和R2具有与上述定义，与氨，伯胺或仲胺，或它们的盐的相同含义。