Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By isomerization
Patent
1986-09-03
1988-02-02
Davis, Curtis R.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By isomerization
C07C 522
Patent
active
047230517
ABSTRACT:
Process for the isomerization of xylene feedstock employing an aluminum-deficient mordenite catalyst. The xylene feedstock is passed into a reaction zone and in contact with a mordenite catalyst having a silica/alumina mole ratio of at least 30. The xylene feedstock may comprise a substantially pure meta-xylene, a mixture of xylene isomers, or in the preferred embodiment, a mixture of xylene isomers and ethylbenzene in which para-xylene is present in less than an equilibrium amount, and ethylbenzene present in an amount greater than the para-xylene content. The reaction zone is operated at a temperature within the range of 350.degree.-600.degree. C. and a hydrogen pressure within the range of 200-1000 psig to effect isomerization of xylene isomers to provide an increased para-xylene content and disproportionation of ethylbenzene to provide a reduced ethylbenzene content in the product.
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Butler James R.
Menard Kevin P.
Abokhair John K.
Cheairs M. Norwood
Cosden Technology, Inc.
Davis Curtis R.
Jackson William D.
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