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62 条记录 (耗时 0.016 秒)

    Procedure for the preparation of alkyl isocyanates
    22.
    发明公开
    Procedure for the preparation of alkyl isocyanates 失效
    Verfahren zur Herstellung von Alkylisocyanaten。

    公开(公告)号：EP0570071A1

    公开(公告)日：1993-11-18

    申请号：EP93201339.4

    申请日：1993-05-08

    申请人： ENICHEM SYNTHESIS S.p.A.

    发明人： Mizia, Franco ,  Rivetti, Franco ,  Romano, Ugo

    IPC分类号： C07C263/04

    CPC分类号： C07C263/04 ,  C07C265/14

    摘要： Multistep process for the preparation of alkyl mono and diisocyanates consisting in reacting the corresponding aliphatic amine or diamine with dimethylcarbonate and, substantially, in partially vaporizing and converting the urethane thus formed in an evaporator to subsequently terminate the cracking in a II° reactor, and finally subjecting the cracking product to fractional distillation at reduced pressure, recycling the unconverted part to the partial vaporization step.

    摘要翻译： 用于制备烷基单和二异氰酸酯的多步骤方法，其中使相应的脂族胺或二胺与碳酸二甲酯反应，并且基本上部分蒸发并转化在蒸发器中形成的氨基甲酸酯，随后在II DEG反应器中终止裂化，最后 使裂化产物在减压下进行分馏，将未转化的部分再循环到部分蒸发步骤。

    Process for producing carbamates
    26.
    发明公开
    Process for producing carbamates 失效
    生产氨基甲酸酯的方法

    公开(公告)号：EP0391473A1

    公开(公告)日：1990-10-10

    申请号：EP90200753.3

    申请日：1990-03-29

    申请人： ENICHEM SYNTHESIS S.p.A.

    发明人： Calderoni, Carlo ,  Mizia, Franco ,  Rivetti, Franco ,  Romano, Ugo

    IPC分类号： C07C271/06 ,  C07C269/04

    CPC分类号： C07C269/04

    摘要： A process for preparing carbamates is disclosed, in which:
    - a stoichiometric or higher-than-stoichiometric amount of an alkyl carbonate or a cycloalkyl carbonate is reacted with an aliphatic, cycloaliphatic or aromatic amine, in a first reaction step, by operating in the presence of a carbamation catalyst, in order to produce a mixture of a carbamate and an urea,
    - the urea contained in the reaction product from the first process step is reacted with carbonate, in a second reaction step, in order to produce the corresponding carbamate, and
    - the reaction mixture coming from the second process step is submitted to treatments in order to recover the carbamate.
    The process makes it possible high yields and high values of selectivity to the useful reaction product to be obtained.

    摘要翻译： 公开了制备氨基甲酸酯的方法，其中： - 在第一反应步骤中，化学计量或高于化学计量量的烷基碳酸酯或环烷基碳酸酯与脂族，脂环族或芳族胺反应，通过在 存在氨基甲酸酯化催化剂以产生氨基甲酸酯和脲的混合物， - 在第二反应步骤中，使来自第一工艺步骤的反应产物中所含的脲与碳酸酯反应，以产生相应的氨基甲酸酯 ，并且 - 将来自第二工艺步骤的反应混合物进行处理以回收氨基甲酸酯。 该方法使得可以获得高产率和高选择性的有用反应产物。

    Catalytic procedure for the prepartation of organic carbonates
    27.
    发明公开
    Catalytic procedure for the prepartation of organic carbonates 失效
    用于制备有机碳酸酯的催化方法。

    公开(公告)号：EP0574082A3

    公开(公告)日：1994-12-28

    申请号：EP93201598.5

    申请日：1993-06-04

    申请人： ENICHEM SYNTHESIS S.p.A.

    发明人： Delledonne, Daniele ,  Rivetti, Franco ,  Romano, Ugo

    IPC分类号： C07C68/00 ,  C07C69/96

    CPC分类号： C07D317/38 ,  C07C68/005 ,  C07D317/36 ,  C07C69/96

    摘要： Catalytic procedure for the preparation of an organic carbonate having general formula (I):
    wherein R represents a C 1 -C 10 alkyl radical, linear or branched, or a C 5 -C 8 cycloalkyl radical; or of a cyclic organic carbonate having general formula (II):
    wherein R' represents a C 2 -C 5 alkylene radical, linear or branched; including the reacting of an aliphatic or cyclo-aliphatic alcohol having general formula (III):
    or an aliphatic diol having general formula (IV):
    wherein R and R' have the meaning described above, with carbon monoxide and oxygen, in the presence of a catalyst composed of a cobalt(II) or cobalt(III) ion and an organic binder containing at least one oxygen atom, characterized in that the process is carried out in the presence of at least one reaction coadjuvant selected from the following groups of linear or cyclic compounds: ureas, nitriles, amides, phosphoramides, sulphones, sulphoxides, carbamates.