Selective production and reaction of p-Disubstituted aromatics over zeolite ZSM-48
AssigneeMobil Oil Corporation
InventorLewis B. Young
Life of this patent
Estimating the term…
Abstract
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.
Claims27
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.degree. C. and 750.degree. 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 selective reaction of 1,4-disubstituted aromatic compounds in a mixture of disubstituted aromatic compounds to produce a product enriched in 1,2- and/or 1,3-disubstituted aromatic isomers which comprises contacting said mixture under conversion conditions including a temperature of between about 150.degree. C. and about 800.degree. C. 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.
Dependencies are inferred from the claim text.