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    Process for producing 1,3-dialkyl-2-imidazolidinone
    1.
    发明公开
    Process for producing 1,3-dialkyl-2-imidazolidinone 失效
    一种用于制备1,3-二烷基-2-咪唑啉酮的过程。

    公开(公告)号：EP0198345A1

    公开(公告)日：1986-10-22

    申请号：EP86104563.1

    申请日：1986-04-03

    申请人： MITSUI TOATSU CHEMICALS, Inc.

    发明人： Nagata, Teruyuki ,  Kajimoto, Nobuyuki ,  Wada, Masaru ,  Mizuta, Hideki ,  Tamaki, Akihiro

    IPC分类号： C07D233/32

    CPC分类号： C07D233/32

    摘要： An improved process of producing 1,3-dialkyl-2-imidazo- lidinones directly from N,N'-dialkylethylenediamine and urea with a high yield is provided, which process comprises reacting a N, N'-dialkylethylenediamine of the formula
    wherein R represents -CH 3 , -C 2 H 5 , -C 3 H 7 or -C 4 H 9 , with urea at 180°C or higher in the presence of a polar solvent, to obtain a 1,3-dialkyl-2-imidazolidinone of the formula
    and preferably comprises carrying out the reaction at two stages, that is, the initial period reaction being carried out at 140°C or lower to from a 1,1'-dialkyl-1,1'-dimethylenebisurea and successively the latter reaction being carried out at 180°C or higher.

    Process for preparing high-purity aniline
    3.
    发明公开
    Process for preparing high-purity aniline 失效
    Verfahren zur Herstellung von Anilin hoher Reinheit。

    公开(公告)号：EP0458006A1

    公开(公告)日：1991-11-27

    申请号：EP91100621.1

    申请日：1991-01-19

    申请人： MITSUI TOATSU CHEMICALS, Inc.

    发明人： Nagata, Teruyuki ,  Watanabe, Katsuji ,  Kono, Yoshitsugu ,  Tamaki, Akihiro ,  Kobayashi, Takashi

    IPC分类号： C07C209/36

    CPC分类号： C07C209/36

    摘要： A process for the continuous preparation of aniline by hydrogenating nitrobenzene is disclosed which comprises the steps of suspending, in an aniline solvent, a catalyst of palladium or palladium-platinum which is deposited on a lipophilic carbon having an oil absorbency of at least 100, adding a zinc compound and an alkali metal carbonate or a zinc compound and an alkali metal bicarbonate as promotors to the reaction system, and carrying out reaction at a temperature of from 150 to 250°C substantially in the absence of water while aniline and water formed in said reaction are continuously distilled off as vapor from the reaction product, and the concentration of nitrobenzene in the reaction solution is maintained at 0.01% by weight or less.

    摘要翻译： 公开了通过氢化硝基苯连续制备苯胺的方法，其包括以下步骤：在苯胺溶剂中悬浮沉积在吸油性至少为100的亲脂性碳上的钯或钯 - 铂催化剂，加入 锌化合物和碱金属碳酸盐或锌化合物和碱金属碳酸氢盐作为反应体系的促进剂，并且在150-250℃的温度下基本上不存在水进行反应，同时形成苯胺和水 所述反应作为蒸气从反应产物中连续蒸馏，反应溶液中硝基苯的浓度保持在0.01重量％以下。

    Process for producing 2-oxazolidinones
    4.
    发明公开
    Process for producing 2-oxazolidinones 失效
    Verfahren zur Herstellung von 2-Oxazolidinonen。

    公开(公告)号：EP0244810A1

    公开(公告)日：1987-11-11

    申请号：EP87106458.0

    申请日：1987-05-05

    申请人： MITSUI TOATSU CHEMICALS, Inc.

    发明人： Kajimoto, Nobuyuki ,  Nagata, Tereuyuki ,  Wada, Masaru ,  Tamaki, Akihiro

    IPC分类号： C07D263/22

    CPC分类号： C07D263/22

    摘要： An improved process for producing a 2-oxazolidinone of the formula
    wherein R represents hydrogen atom or a lower alkyl group and R 1 and R 2 are the same as or different and each represent hydrogen atom or a lower alkyl group, by reacting an amino-alcohol of the formula
    wherein R, R 1 and R 2 are each as defined above, and/or its hydrochloride, with phosgene is provided, which process is characterized by carrying out the reaction substantially in the presence of water and a dehydrochlorinating agent, preferably while keeping the pH of the reaction liquid within a range of 3.0 to 10.0 with the dehydrochlorinating agent in water solvent.

    摘要翻译： 一种制备式CHEM的2-恶唑烷酮的改进方法，其中R表示氢原子或低级烷基，R 1和R 2相同或不同，各自表示氢原子或低级烷基，氨基 的式R-NHCHR1CHR2OH的醇，其中R，R1和R2各自如上所定义，和/或其盐酸盐与光气一起提供，该方法的特征在于基本上在水和脱氯化氢存在下进行反应 试剂，优选在使用脱水氢化剂在水溶剂中将反应液体的pH保持在3.0〜10.0的范围内。