Process for reducing coke formation in heavy feed catalytic crac

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

1981-05-04

1983-02-08

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208 56, 208120, 252411R, C10G 916, C10G 1118

Patent

active

043728413

ABSTRACT:
A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone 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 adding a hydrogen donor material to the reaction zone and passing the catalyst from the reaction zone through a reduction zone maintained at an elevated temperature for a time sufficient to at least partially passivate the catalyst.

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