Enhanced olefin yield and catalytic process with diolefins

Details Enhanced olefin yield and catalytic process with diolefins Enhanced olefin yield and catalytic process with diolefins

C - Chemistry, Metallurgy

10

G

C10G 11/00 (2006.01)

Patent

CA 2290960

The invention provides a process for improving the conversion of a hydrocarbon feedstock to light olefins comprising mixing a hydrocarbon feedstock with a diolefin to form a mixture; and thereafter contracting the mixture with a zeolite cracking catalyst. Preferably the catalyst is contacted at a reaction temperature within the range of about 500 °C to about 750 °C and the feedstock flows at a weight hourly space velocity in the range of about 0.1 Hr-1 WHSV to about 100 Hr-1 WHSV. The diolefin can be a straight, branched, or cyclic hydrocarbon having at least two II bonds. Preferably diolefin is a hydrocarbon of 4 to 20 carbons.

L'invention concerne un procédé améliorant la conversion d'une charge d'hydrocarbures en oléfines légères, qui consiste à mélanger ladite charge avec une dioléfine pour constituer un mélange, puis à mettre ce mélange en contact avec un catalyseur de craquage zéolitique. De préférence, le catalyseur est mis en contact à une température de réaction comprise entre 500 DEG C environ et 750 DEG C environ, et la charge s'écoule à une vitesse spatiale horaire en poids compris entre 0,1 Hr<-1> environ et 100 Hr<-1> environ. La dioléfine peut être un hydrocarbure à chaîne droite, ramifiée ou cyclique ayant au moins deux liaisons PI . De préférence, la dioléfine est un hydrocarbure ayant de 4 à 20 atomes de carbone.

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