PROCESS FOR PRODUCING TOLUIDENE-MIXTURE CONTAINING M-TOLUIDENE WITH ISOMERIZING O- AND/OR P-TOLUIDENE

摘要

The invention relates to a process for the isomerization of o-, m- or p-toluidine, or of a mixture of them, on a zirconium-containing zeolite catalyst of the pentasil type. Catalysts of this type are distinguished by particularly high activity and a long useful life. The invention particularly relates to the preparation of m-toluidine by isomerization of o- and/or p-toluidine on zirconium-containing zeolite catalysts of the pentasil type.