Process for the dealumination and ion exchange of zeolites

Details Process for the dealumination and ion exchange of zeolites Process for the dealumination and ion exchange of zeolites

1991-06-17

1991-12-17

Pal, Asok

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By isomerization

502 66, 502 78, 502 74, C07C 513, B01J 2918

Patent

active

050736680

ABSTRACT:
The instant invention comprises a process for concurrently dealuminating and ion exchanging an acid stable sodium ion-containing zeolite by contacting the zeolite with an about 0.5 M to about 3 M nitric acid solution containing ammonium nitrate in an amount sufficient to fully exchange the sodium ions for ammonium and hydrogen ions at a temperature of at least about -10.degree. C. The instant invention also relates to the zeolites thus prepared by the instant process and catalysts prepared utilizing these zeolites.

REFERENCES:
patent: 3442794 (1969-05-01), Van Helden et al.
patent: 3475345 (1969-10-01), Benesi
patent: 3507931 (1970-04-01), Morris et al.
patent: 3597155 (1971-08-01), Flanigen
patent: 4018711 (1977-04-01), Bertolacini
patent: 4665272 (1987-05-01), Bakas
patent: 5019661 (1991-05-01), Mole

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