Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Patent
1996-12-20
1998-04-28
Caldarola, Glenn
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
585470, 585475, C07C 552
Patent
active
057446733
ABSTRACT:
The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, preferably following a calcining step wherein a synthesized zeolite beta catalyst containing a templating agent is calcined at a temperature in the range of from about 200.degree. to 1000.degree. C. in order to remove a substantial portion of the catalyst templating agent and an ion-exchanging step wherein the calcined catalyst is ion-exchanged with a salt solution containing at least one hydrogen forming cation selected from NH.sub.4.sup.+ and quaternary ammonium. Conversion processes utilizing the catalyst of the invention, including isomerization of paraffins and alkylaromatics and disproportionation of aromatics, also are disclosed.
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Flanigen Edith M.
Skeels Gary W.
Caldarola Glenn
Conser Richard E.
McBride Thomas K.
Spears Jr. John F.
UOP
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