Multi component catalyst and a process for catalytic cracking of

Details Multi component catalyst and a process for catalytic cracking of Multi component catalyst and a process for catalytic cracking of

1990-12-18

1991-10-08

Davis, Curtis R.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

585407, 585739, C10G 1105

Patent

active

050551760

ABSTRACT:
A catalytic cracking catalyst and process are disclosed using a catalyst containing: a matrix, a large pore molecular sieve, a shape selective paraffin cracking/isomerization zeolite and a shape selective aliphatic aromatization zeolite. An exemplary catalyst comprises dealuminized zeolite Y, optionally containing rare earth elements, HZSM-5, and gallium ZSM-5 in a matrix. The matrix contains and protects the relatively fragile zeolite components and acts as a sodium and metals sink. The large pore molecular sieve cracks large hydrocarbons to lighter paraffins and olefins. The shape selective paraffin cracking/isomerization component cracks/isomerizes the paraffins produced by the large pore molecular sieve. The shape selective aliphatic aromatization catalyst converts light paraffins and olefins into aromatics. A single shape selective zeolite, e.g., ZSM-5 with a controlled amount of an aromatization component such as gallium, may promote both paraffin cracking/isomerization and aromatization.

REFERENCES:
patent: 3758403 (1973-09-01), Rosinski et al.
patent: 3804747 (1974-04-01), Kimberlin et al.
patent: 4834867 (1989-05-01), Gilson

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