Process for reducing coke formation in heavy feed catalytic...

Details Process for reducing coke formation in heavy feed catalytic... Process for reducing coke formation in heavy feed catalytic...

C - Chemistry, Metallurgy

10

G

196/111

C10G 9/16 (2006.01)

Patent

CA 1184522

ABSTRACT OF THE DISCLOSURE A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone (10) is disclosed, where the feedstock contains at least two metal contaminants selected from the class consisting of nickel, vanadium and iron, and where these contaminants become deposited on the catalyst. The method comprises passing the catalyst from reaction zone (10) through a reduction zone (70) maintained at an elevated temperature for a time sufficient to at least partially passivate the catalyst. The amount of coke may be decreased still further by the addition to reaction zone (10) of a hydrogen donor material.

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