VERFAHREN ZUR UMWANDLUNG VON AROMATISCHEN KOHLENWASSERSTOFFEN MIT 8 KOHLENSTOFFATOMEN

摘要

A C8 aromatic hydrocarbon mixture which typically may consist essentially of xylenes and ethylbenzene, the latter being present in an amount of not more than 40 weight percent, is converted to a product containing an increased proportion of p-xylene by bringing it into contact with an acid leached hydrogen form mordenite having a silica to alumina mole ratio of 15-21 at a temperature in the range of 180 DEG to 250 DEG C. under a pressure of atmospheric to 200 Kg/cm2. Hydrogen may be present in the system in a mole ratio of hydrogen to C8 aromatic hydrocarbon mixture of 0-10. The reaction may be conducted in the vapor phase or in the liquid phase.