VERFAHREN ZUR HERSTELLUNG VON DINITROTOLUOL
    125.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON DINITROTOLUOL 有权
    用于生产二硝基甲苯

    公开(公告)号:EP1713756A1

    公开(公告)日:2006-10-25

    申请号:EP05701305.4

    申请日:2005-02-02

    CPC classification number: C07C201/08 C07C201/14 C07C205/06

    Abstract: The invention relates to a method for producing dinitrotoluene, comprising the steps of a) reacting toluene with nitric acid in the presence of sulphuric acid to give mononitrotoluene, b) separating the reaction product of step a) into a mononitrotoluene-containing organic phase and a sulphuric acid-containing aqueous phase, c) reacting the mononitrotoluene-containing organic phase with nitric acid in the presence of sulphuric acid to give dinitrotoluene, d) separating the reaction product of step c) into a dinitrotoluene-containing organic phase and a sulphuric-acid containing aqueous phase, whereby the reaction product of step a) contains 3.0 to 8 wt. % of toluene, in relation to the organic phase, and 0.1 to 1.2 wt. % of nitric acid, in relation to the aqueous phase and the phase separation of step b) is carried out in such a manner that further reaction of toluene with nitric acid is prevented.

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