Influence of sulphidation and fluoridation on the HDN of o-toluidine over tungsten catalysts ex ammonium tertrathiotungstate

摘要

Alumina-supported tungsten catalysts, prepared by dcomposition of supported ammonium tetrathiotungstate, had a much higher hydrodenitrogenation activity than classically prepared tungsten catalysts, because they wee muc better suplhided. Fluoride addition substantially increased the activity for the hydrogenation of the aromatic ring and the direct cleavage of the C(sp~2)-N bond in o-toluidine, while it hardly changed the activity for C(sp~3)-N bond breaking in methylcyclohexylamine and olefin hydrogenation.