Process for fluid catalytic cracking

Details Process for fluid catalytic cracking Process for fluid catalytic cracking

C - Chemistry, Metallurgy

10

G

C10G 11/18 (2006.01) C10G 11/05 (2006.01)

Patent

CA 2449642

The invention relates to a process for the fluid catalytic cracking of hydrocarbons using a downflow reactor and a catalyst with an Akzo Accessibility Index (AAI) of at least 3.5. This process combines the advantages of the use of downflow and riser reactors: minimal overcracking and high conversion of the higher boiling fraction. The use of a downflow reactor minimises overcracking, while the cracking catalyst facilitates high conversions, even for high-boiling fractions in the feed.

L'invention se rapporte à un procédé de craquage catalytique fluide d'hydrocarbures faisant intervenir un réacteur à écoulement biphasique et un catalyseur présentant un indice d'accessibilité d'AKZO (AAI) d'au moins 3,5. Ce procédé allie les avantages de l'utilisation de réacteurs à écoulement biphasique et à colonne montante: à savoir surcraquage minimal et forte conversion et fraction plus élevée de cuisson. L'utilisation d'un réacteur à écoulement biphasique réduit le surcraquage, tandis que le catalyseur de craquage facilite de fortes conversions, même pour des fractions élevées de cuisson de la charge.

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