초록

Para-Disubstituted aromatics are produced in the presence of a catalyst comprising zeolite ZSM-48. Selective cracking of para-isomers may also be accomplished to produce mixtures rich in meta-isomers.

대표청구항 ▼

A process for effecting disproportionation of toluene to produce benzene and xylenes in which the proportion of para-xylene isomer is in excess of its normal equilibrium concentration which comprises contacting toluene under conditions including a temperature of between about 350°C. and 750°C., a pr

A process for effecting disproportionation of toluene to produce benzene and xylenes in which the proportion of para-xylene isomer is in excess of its normal equilibrium concentration which comprises contacting toluene under conditions including a temperature of between about 350°C. and 750°C., a pressure of between about 1 atmosphere and 100 atmospheres, and a weight hourly space velocity of between about 0.25 and 20 with a catalyst comprising zeolite ZSM-48. A process for effecting the alkylation of mono-substituted aromatic compounds to produce a di-substituted aromatic product in which the para-isomer is in excess of normal equilibrium concentration which comprises contacting a mono-substituted aromatic compound with an alkylating agent under conditions effective for accomplishing said alkylation in the presence of a catalyst comprising zeolite ZSM-48.