Process for nitrating toluene

Details Process for nitrating toluene Process for nitrating toluene

C - Chemistry, Metallurgy

07

C

260/611

C07C 205/06 (2006.01) B01J 37/02 (2006.01)

Patent

CA 1086775

PROCESS FOR NITRATING TOLUENE Abstract of the disclosure: Toluene is nitrated with nitric acid in the gaseous phase under reduced pressure and at temperatures from about 80 - 180°C, while using an acid inorganic catalyst consisting of a carrier substance based on SiO2 and/or Al2O3 being impregnated with a tardily volatile inorganic acid such as H2SO4 or H3PO4 and optionally with metal salts of such acids. This process yields essentially p-nitrotoluene, in addition to a smaller quantity of o-nitrotoluene and a very small amount of m-isomer. The technology of the process is simple and provides good yields. The nitrotoluenes - especially the p-nitrotoluene - re- present interesting intermediates, for example for the manu- facture of dyestuffs.

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