C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 4/02 (2006.01) C10G 9/26 (2006.01) C10G 11/00 (2006.01) C10G 11/05 (2006.01) C10G 57/02 (2006.01)
Patent
CA 2328899
A process for selectively producing C2-C4 olefins from a catalytically cracked or thermally cracked naphtha stream. A mixture of the naphtha stream and a stream of steam is fed into a reaction zone where it is contacted with a catalyst containing from about 10 to 50 wt.% of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500 to 650 ~C and a hydrocarbon partial pressure from about 10 to 40 psia.
L'invention concerne un procédé d'élaboration sélective d'oléfines C¿2?-C¿4? sous craquage catalytique ou thermique à partir d'une alimentation en naphta. On injecte un flux combiné naphta/vapeur dans une zone de réaction où le mélange vient 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, sous des conditions de réaction parmi lesquelles on citera une température environ comprise entre 500· C et 650· C et une pression partielle de l'hydrocarbure oscillant environ entre 10 et 40 en psi absolu.
Asplin John Ernest
Chen Tan-Jen
Fung Shun Chong
Henry Brian Erik
Janssen Marcel Johannes Gerarardus
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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