Xylenes isomerization catalyst system and use thereof

B - Operations – Transporting – 01 – J

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B01J 29/064 (2006.01) B01J 37/30 (2006.01)

Patent

CA 2574900

A catalyst system that exhibits a ratio of ethylene saturation to aromatics ring saturation of greater than 3,500. The catalyst system comprises two components and each component comprises a crystalline molecular sieve having a Constraint Index of from about 1 to about 12 and an effective amount of Group VIII metal. The catalyst system finds particular application in ethylbenzene conversion/xylenes isomerization reactions. The catalyst system can be prepared by incorporating the Group VIII metal into the molecular sieves by competitive ion exchange.

L'invention concerne un système catalyseur qui présente un taux de saturation en éthylène par rapport à la saturation en cycles aromatiques supérieur à 3500. Le système catalyseur comprend deux constituants et chaque constituant comprend un tamis moléculaire cristallin présentant un indice de contrainte compris entre environ 1 et environ 12 et une quantité efficace de métal du groupe VIII. Le système catalyseur trouve une application particulière dans des réactions d'isomérisation de xylènes par conversion d'éthylbenzène. Le système catalyseur peut être préparé par incorporation du métal du groupe VIII dans les tamis moléculaires par échange d'ions compétitif.

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