Catalyst for the fluid catalytic cracking of heavy oil and method for fluid catalytic cracking

摘要

An FCC catalyst which deactivates catalyst-poisoning metals, such as nickel and vanadium, contained in a feedstock oil, inhibits the generation of hydrogen or coke, has excellent cracking activity and the high ability to treat a bottom, and gives a gasoline and LCO fraction in high yield. The FCC catalyst retains these performances on a high level for long and hence has an improved life. Also provided is a method of FCC using the catalyst. The FCC catalyst comprises: a compound of a divalent metal or of di- and trivalent metals which shows an XRD pattern characteristic of a divalent-metal carbonate; or a dispersion of the compound in an inorganic oxide matrix; or a dispersion of the compound and a crystalline aluminosilicate zeolite in an inorganic oxide matrix. The method of FCC comprises using a combination of one or more FCC catalysts of this kind and an FCC catalyst obtained by dispersing a crystalline aluminosilicate zeolite in an inorganic oxide matrix.