Josef Meissner GmbH & Co. KG

Josef MeissnerModel MNT -Mononitrotoluene Plants

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In industrial chemistry, Mononitrotoluene is mainly used as a pre-product for polyurethanes, via the route Dinitrotoluene/TDA/TDI. Mononitrotoluene is obtained as mixture of isomers by nitration of Toluene. After isomer separation, the obtained pure isomers serve as an important raw material for the dyeing industry and related industries.

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MNT plants by MEISSNER are characterized by their circulation reactors, which have been developed especially for nitration purposes, and which ensure a high degree of security due to their large cooling areas with small reactor volumes. The circulation pumps used in the reactors provide for an optimum conversion of the reactants and thus an MNT of uniformly high quality.

For safety reasons, the separation of the MNT isomer mixture from the spent acid is performed in dynamic separators featuring a short separation time (within the range of seconds) and a very small volume. The mixture of MNT isomers is automatically conveyed to the washing section consisting of MEISSNER compact washing apparatus, which perform the product washing as well as the separation of the product from the washing medium.

Additionally to the MNT plant, MEISSNER as main contractor also offers the spent acid regeneration plant performing the recovery of concentrated Sulphuric Acid, as well as the respective plant for MNT isomer separation, and an economical waste water treatment plant for the disposal of toxic nitrocresols contained in the MNT waste water so that a biologically degradable waste water is obtained.