C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 4/02 (2006.01) C07C 4/04 (2006.01) C07C 4/06 (2006.01) C10G 11/02 (2006.01) C10G 11/04 (2006.01) C10G 11/05 (2006.01) C10G 35/02 (2006.01) C10G 35/04 (2006.01) C10G 35/06 (2006.01) C10G 35/095 (2006.01) C10G 51/02 (2006.01) C10G 51/04 (2006.01) C10G 57/02 (2006.01)
Patent
CA 2329242
A process for selectively producing C2-C4 olefins from a catalytically cracked or thermally cracked naphtha stream. The naphtha stream 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 naphta 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
Henry Brian Erik
Ladwig Paul Kevin
Stuntz Gordon Frederick
Wachter William Augustine
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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