Preparation of hydroxyl-rich zeolites

Details Preparation of hydroxyl-rich zeolites Preparation of hydroxyl-rich zeolites

1990-03-30

1992-09-01

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 60, B01J 2906

Patent

active

051438763

ABSTRACT:
Zeolites (e.g. ZSM-5 and zeolite beta) enriched with hydroxyl groups are prepared by ammonia treatment of sieves which have suffered loss of tetrahedral aluminum from framework positions followed by careful calcination (200.degree.-450.degree. C.). The hydroxyl group created by this method are stable only to 500.degree. C.

REFERENCES:
patent: 3404086 (1968-10-01), Plank et al.
patent: 3644200 (1972-02-01), Young
patent: 4257885 (1981-03-01), Grose et al.
patent: 4449900 (1984-04-01), Chang et al.
patent: 4478806 (1984-10-01), Ball et al.
patent: 4503023 (1985-03-01), Breck, deceased et al.
patent: 4524055 (1985-06-01), Onodera et al.
Jacobs, P. A. and Roland von Ballmoos, "Framework Hydroxyl Groups of H-ZSM-5 Zeolites", J. Phys. Chem. 1982, 86, pp. 3050-3052.
Datka, J. and E. Tuznik, "Hydroxyl Groups and Acid Sites in Na-ZSM-5 Zeolites Studied by I. R. Spectroscopy", Zeolites, 1985, vol. 5, Jul. pp. 230-232.
Chu, Cynthia T-W, and Clarence D. Chang, "Isomorphous Substitution in Zeolite Frameworks. 1. Acidity of Surface Hydroyxls in [B]-, [Fe]-, [Ga]-, and [Al]-ZSM-5", J. Phys. Chem., vol. 89, 1569-1571 (1985).

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