Low pressure naphtha hydrocracking process

Details Low pressure naphtha hydrocracking process Low pressure naphtha hydrocracking process

C - Chemistry, Metallurgy

10

G

C10G 47/16 (2006.01)

Patent

CA 2309093

This invention is directed to extinction recycle naphtha hydrocracking processes. Large pore zeolite catalysts with Constraint Indices less than 2, such as USY or beta, which are loaded with noble metals such as Pt or Pd or with transition metals such as Ni in combination with Mo or W are employed. Preferably, low hydrogen partial pressures, and a feedstock relatively rich in hydrogen are used, in order to prevent catalyst aging.

L'invention concerne des procédés d'hydrocraquage de naphta à recyclage par extinction. On utilise des catalyseurs comprenant des zéolithes à larges pores, telles que des zéolithes Y ultrastables ou Beta avec des indices de contrainte inféireurs à 2. Ces catalyseurs sont chargés avec des métaux précieux tels Pt ou Pd ou avec des métaux de transition tels que Ni en combinaison avec Mo ou W. On utilise, de préférence, des pressions partielles à faible teneur en hydrogène et une charge relativement riche en hydrogène de manière à éviter le vieillissement des catalyseurs.

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