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    SEPARATION METHOD AND METHOD FOR PRODUCING ISOCYANATE
    2.
    发明公开
    SEPARATION METHOD AND METHOD FOR PRODUCING ISOCYANATE 审中-公开
    温哥华VERFAHREN ZUR HERSTELLUNG VON ISOCYANAT

    公开(公告)号：EP2626345A4

    公开(公告)日：2015-08-12

    申请号：EP11830666

    申请日：2011-10-04

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： SHINOHATA MASAAKI ,  MIYAKE NOBUHISA

    IPC分类号： C07C263/20 ,  B01D3/00 ,  B01D3/14 ,  B01D3/34 ,  C07B63/00 ,  C07C263/04 ,  C07C265/14

    CPC分类号： C07C263/20 ,  B01D3/009 ,  B01D3/143 ,  B01D3/34 ,  C07B63/00 ,  C07C263/04 ,  Y02P20/127 ,  C07C265/14

    摘要： An object of the present invention is to provide the separation of a mixture containing plural types of reversibly reacting compounds, especially, a method for efficiently separating an isocyanate from a mixture containing the isocyanate and a hydroxy compound, particularly, a method for efficiently separating an isocyanate and a hydroxy compound that form by the thermal decomposition of an N-substituted carbamic acid ester. The object is attained by a method for separating, with a multi-stage distillation column, a mixture containing an active hydrogen-containing compound (A) and a compound (B) that reversibly reacts with the active hydrogen-containing compound (A), the method comprising distillation-separating the active hydrogen-containing compound (A) and the compound (B) with the multi-stage distillation column in the presence of an intermediate-boiling-point inactive compound (C) that has a normal boiling point between a normal boiling point of the active hydrogen-containing compound (A) and a normal boiling point of the compound (B) and is chemically inactive for both of the (A) and the compound (B).

    摘要翻译： 本发明的目的是提供含有多种可逆反应化合物的混合物的分离，特别是从含有异氰酸酯和羟基化合物的混合物中有效分离异氰酸酯的方法，特别是有效分离异氰酸酯的方法 异氰酸酯和通过N-取代氨基甲酸酯的热分解形成的羟基化合物。 本发明的目的是通过多级蒸馏塔分离含有活性氢化合物（A）和与活性氢化合物（A）可逆反应的化合物（B）的混合物的方法来实现的， 该方法包括在中间沸点无活性化合物（C）的存在下，用多级蒸馏塔将活性氢化合物（A）和化合物（B）蒸馏分离，所述中间体沸点无活性化合物（C）的沸点为 活性含氢化合物（A）的正常沸点和化合物（B）的标准沸点，对于（A）和化合物（B）都是化学惰性的。

    PROCESS FOR PRODUCING ISOCYANATE
    6.
    发明公开
    PROCESS FOR PRODUCING ISOCYANATE 审中-公开
    用于制造异氰酸酯

    公开(公告)号：EP2275406A4

    公开(公告)日：2015-10-14

    申请号：EP08752810

    申请日：2008-05-15

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： SHINOHATA MASAAKI ,  MIYAKE NOBUHISA

    IPC分类号： C07C263/04 ,  C07C263/18 ,  C07C265/14

    CPC分类号： C07C263/04 ,  C07C263/18 ,  C07C2601/14 ,  C07C265/14

    摘要： An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.