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    VERFAHREN ZUR HERSTELLUNG VON TOLUYLENDIAMIN DURCH HYDRIERUNG VON DINITROTOLUOL
    12.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON TOLUYLENDIAMIN DURCH HYDRIERUNG VON DINITROTOLUOL 有权
    受理并氢化二硝基甲苯二胺PRODUCING

    公开(公告)号：EP2382181A1

    公开(公告)日：2011-11-02

    申请号：EP09799345.5

    申请日：2009-12-21

    Applicant: BASF SE

    Inventor： COELHO TSOU, Joana ,  OEHLENSCHLÄGER, Steffen ,  SCHWAB, Ekkehard ,  MACKENROTH, Wolfgang ,  VOß, Hartwig ,  MAIXNER, Stefan ,  NETO, Samuel ,  BÖHMEKE, Sven ,  VAN LAAR, Frederik

    IPC: C07C209/36 ,  C07C211/50

    CPC classification number: C07C209/36 ,  C07C211/50

    Abstract: The invention relates to a method for producing toluylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst in a vertically upright reactor (1), at the upper end of which a propulsion jet nozzle (2) is arranged, through which the reaction mixture drawn from the reactor sump is injected into the upper area of the reactor (1) through an external loop, the reaction mixture then flowing into a central insertion pipe (4), which is arranged in the longitudinal direction of the reactor, flowing through said insertion pipe from top to bottom and flowing upward again in an internal loop movement outside of the insertion pipe (4), having a heat exchanger (6) in the interior space of the reactor (1), through which cooling water flows, and in the process absorbs part of the reaction heat, the dinitrotoluene being fed at the upper end of the reactor (1) and the hydrogen being fed at the lower end of the reactor (1), and in addition to the heat exchanger (6) arranged in the interior space of the reactor (1), another heat exchanger (W) being inserted in the external loop, water absorbing the remaining reaction heat through indirect heat exchange with the reaction mixture, characterized in that the reaction heat is used to produce steam at an overpressure of at least 4 bar in that the hydrogenation of dinitrotoluene into toluylenediamine is performed at a temperature > 180°C.

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