Process for selectively producing c3 olefins in a fluid...

Details Process for selectively producing c3 olefins in a fluid... Process for selectively producing c3 olefins in a fluid...

C - Chemistry, Metallurgy

10

G

C10G 11/02 (2006.01) C07C 4/02 (2006.01) C07C 4/06 (2006.01) C10G 11/04 (2006.01) C10G 11/05 (2006.01) C10G 57/02 (2006.01)

Patent

CA 2329244

A process for selectively producing olefins containing 3 carbons from a catalytically cracked or thermally cracked naphtha stream. The process involves reacting the cracked naphtha in the presence of a catalyst containing from about 10 to 50 wt.% of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers, stripping the catalyst, regenerating the catalyst and fractionating the reaction products. Process conditions include temperatures ranging from about 500-650 degrees celsius and a hydrocarbon partial pressure from about 10 to 40 psia.

L'invention concerne un procédé d'élaboration sélective d'oléfines C¿3? à partir d'une alimentation en naphta sous craquage catalytique ou thermique, qui comprend les étapes suivantes: réaction du flux naphta sous craquage au contact d'un catalyseur renfermant environ entre 10 % et 50 %, en poids, d'une zéolite cristalline dont les pores ont un diamètre moyen inférieur à environ 0,7 nanomètre, extraction du catalyseur, régénération du catalyseur et fractionnement des produits de réaction. Parmi les conditions de réaction figurent des températures comprises entre environ 500 ·C et 650 ·C et une pression partielle de l'hydrocarbure oscillant entre environ 10 et 40 en psi absolu.

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