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    Method for production of maleimides
    1.
    发明公开
    Method for production of maleimides 失效
    一种用于生产马来酰亚胺的过程。

    公开(公告)号：EP0165574A2

    公开(公告)日：1985-12-27

    申请号：EP85107397.3

    申请日：1985-06-14

    申请人： Nippon Shokubai Kagaku Kogyo Co., Ltd

    发明人： Kita, Yuichi ,  Sakamoto, Kentaro ,  Baba, Masao ,  Okubo, Atsushi

    IPC分类号： C07D207/448

    CPC分类号： C07D207/448

    摘要： A method for the production of maleimides, which comprises subjecting maleinamic acids to ring-closure imidation in an organic solvent capable of forming an azeotrope with water in the presence of an acid catalyst at a temperature in the range of 120° to 250°C while removing the formed water in the form of an azeotrope with said organic solvent and thereafter purifying the produced maleimides.

    Maleimide manufacture
    2.
    发明公开
    Maleimide manufacture 失效
    马来西亚制造

    公开(公告)号：EP0213933A3

    公开(公告)日：1987-11-19

    申请号：EP86306648

    申请日：1986-08-28

    申请人： Nippon Shokubai Kagaku Kogyo Co., Ltd

    发明人： Kishino, Kazuo ,  Kita, Yuichi ,  Sakamoto, Kentaro ,  Baba, Masao ,  Nakagawa, Yoichi

    IPC分类号： C07D207/448

    CPC分类号： C07D207/448 ,  Y02P20/584

    摘要： A method for the manufacture of a maleimide comprising the steps of heating a maleinamic acid in an organic solvent capable of forming an azeotrope with water in the presence of an acid catalyst while causing the water formed during the course of said reaction to be removed from the reaction system in the form of an azeotrope with said organic solvent thereby effecting ring-closure imidation of said maleinamic acid, which method is characterized by separating and recovering an acid catalyst layer from the organic solvent layer after completion of said ring-closure imidation and circulating said acid catalyst layer to the step of said ring-closure imidation for repeated use therein.

    Method for inhibiting polymerization of maleimides
    7.
    发明公开
    Method for inhibiting polymerization of maleimides 失效
    一种用于抑制马来酰亚胺的聚合方法。

    公开(公告)号：EP0230597A2

    公开(公告)日：1987-08-05

    申请号：EP86117385.4

    申请日：1986-12-13

    申请人： Nippon Shokubai Kagaku Kogyo Co., Ltd

    发明人： Tobo, Tomoaki ,  Kita, Yuichi ,  Sakamoto, Kentro ,  Baba, Masao

    IPC分类号： C07D207/448 ,  C07D207/452

    CPC分类号： C07D207/448 ,  C07D207/452

    摘要： A method for inhibiting polymerization of a maleimide, which comprises adding to said maleimide, as a polymerization inhibitor, at least one compound selected from the group consisting of thiodipropionic esters, 4-t-butyl-catechol, 2,6-di-t-butyl-p-cresol,2,5-di-t-butyl-hydroquinone, 2-t-butyl-hydroquinone, 2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5-trizaine, 2,2'-thiobis(4-methyl-6-t-butylphenol), 4,4'-thiobis-16-t-butyl-m-cresol), and triethyleneglycol-bis-[3-(3-t-butyl-5-methyl-4-hydroxyphenyl) propionate].