Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Patent
1994-05-05
1995-12-12
Achutamurthy, P.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
585467, C07C 552
Patent
active
054751799
ABSTRACT:
A method for the selective disproportionation of a substituted aromatic compound wherein the aromatic compound is passed over a catalytic molecular sieve which has been pre-selectivated with a silicon deposit and then subsequently treated with a silicon-containing, high efficiency p-xylene selectivating agent at conversion conditions. The present invention attains para-xylene product over 95% at a toluene conversion of at least 20%. The present invention also includes the highly para-selective catalyst which results from the pre-selectivation and subsequent treatment of a catalytic molecular sieve with a high efficiency p-xylene selectivating agent under the recited conditions.
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Chang Clarence D.
Rodewald Paul G.
Achutamurthy P.
Kenehan, Jr. Edward F.
McKillop Alexander J.
Mobil Oil
Santini Dennis P.
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