Catalytic cracking process using ammonia-stable zeolite catalyst

Details Catalytic cracking process using ammonia-stable zeolite catalyst Catalytic cracking process using ammonia-stable zeolite catalyst

1975-07-22

1977-07-19

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

252455Z, C10G 1104, B01J 2912

Patent

active

040367398

ABSTRACT:
Highly active, hydrothermally stable and ammonia-stable Y zeolite compositions are disclosed, which compositions are useful as adsorbents, hydrocarbon conversion catalysts, and as acidic supports for catalytic metals. The stabilized Y zeolite composition is prepared from a sodium Y zeolite by a novel sequence of: (1) partial exchange of ammonium ions for sodium ions, (2) steam calcination under controlled conditions of time, temperature and steam partial pressure, and (3) further ion exchange of ammonium ions for sodium ions to reduce the final Na.sub.2 O content to below about one weight-percent.

REFERENCES:
patent: 3257310 (1966-06-01), Plank et al.
patent: 3402996 (1968-09-01), Maher et al.
patent: 3449070 (1969-06-01), McDaniel et al.
patent: 3457191 (1969-07-01), Erickson et al.
patent: 3644200 (1972-02-01), Young
patent: 3926780 (1975-12-01), Ward

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