Process for the catalytic cracking of vanadium-containing feedst

Details Process for the catalytic cracking of vanadium-containing feedst Process for the catalytic cracking of vanadium-containing feedst

1986-09-11

1990-02-13

Mc Farlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208 52CT, 208120, 502521, C10G 1105

Patent

active

049004280

ABSTRACT:
Hydrocarbon feedstocks containing relatively high levels of vanadium contaminants are converted by catalytic cracking to products of lower average molecular weight by contacting the feedstock with a catalyst comprising (1) a crystalline aluminosilicate zeolite dispersed in a matrix and (2) a vanadium passivating agent selected from the group consisting of cerium, praseodymium, neodymium, gadolinium and compounds thereof. The passivating agent is present in the catalyst in an amount greater than about 1.0 weight percent, calculated as the oxide of the vanadium passivating agent and based on the carbon-free weight of the catalyst. The passivating agent is also present in an amount such that the weight ratio of the passivating agent to any lanthanum present in the catalyst, calculated based on the respective oxides, is greater than about 1.0. The total weight of all rare earths present in the catalyst is greater than about 2.0 weight percent, calculated based on the respective rare earth oxides and on the carbon-free weight of the catalyst.

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