VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON NITROBENZOL
    32.
    发明公开
    VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON NITROBENZOL 有权
    工艺硝基苯连续生产

    公开(公告)号:EP2598474A2

    公开(公告)日:2013-06-05

    申请号:EP11743991.9

    申请日:2011-07-26

    Abstract: The invention relates to a continuous method for producing nitrobenzene by nitriding benzene by means of nitric acid or mixtures of nitric acid and sulfuric acid to form raw nitrobenzene, washing the raw nitrobenzene by means of at least one acidic, alkaline, and neutral wash, respectively, wherein a prepurified nitrobenzene is obtained, comprising at least light boilers, optionally medium boilers, and high boilers and salts in addition to nitrobenzene, wherein the prepurified nitrobenzene is further purified by separating light boilers in a distillation apparatus by evaporating the light boilers and separating nitrobenzene from the further purified nitrobenzene thus obtained in a distillation apparatus by partially evaporating nitrobenzene, wherein pure nitrobenzene is removed from the distillation apparatus in gaseous form and then condensed, and wherein the non-evaporated part of the further purified nitrobenzene is fed back into the wash at an arbitrary point.

    Procédé de préparation du paranitrophénol
    40.
    发明公开
    Procédé de préparation du paranitrophénol 失效
    一种制备对硝基苯酚的过程。

    公开(公告)号:EP0251941A1

    公开(公告)日:1988-01-07

    申请号:EP87420140.3

    申请日:1987-05-20

    Inventor: Desbois, Michel

    CPC classification number: C07C201/14 C07C205/22

    Abstract: La présente invention concerne un nouveau procédé de préparation du paranitrophénol par mise en contact dans l'acide fluorhydrique liquide d'un ester minéral de phényle avec un agent de nitration et en ce qu'on réalise simultanément ou successivement une hydrolyse du produit obtenu.

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