Modified MCM-56, its preparation and use

Details Modified MCM-56, its preparation and use Modified MCM-56, its preparation and use

1996-07-22

1998-07-14

Griffin, Walter D.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

585467, 585722, 502 67, 502 79, 502 85, 423717, 423718, C10G 1105, C07C 258, C07C 266, B01J 2906

Patent

active

057798826

ABSTRACT:
A layered composition of matter, MCM-56, has an X-ray diffraction pattern including lines at d-spacing values of 12.4.+-.0.2, 9.9.+-.0.3, 6.9.+-.0.1, 6.2.+-.0.1, 3.55.+-.0.07 and 3.42.+-.0.07 Angstroms and has been selectively modified so that the ratio of the number of active acid sites at its external surface to the number of internal active acid sites is greater than that of the unmodified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gasoline yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.

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patent: 5308471 (1994-05-01), Apelian et al.
patent: 5362697 (1994-11-01), Fung et al.
patent: 5453554 (1995-09-01), Cheng et al.
patent: 5536894 (1996-07-01), Degnan et al.
patent: 5552357 (1996-09-01), Lago et al.
patent: 5557024 (1996-09-01), Cheng et al.

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