Novel process for the preparation of ZSM-5 aluminosilicate zeoli

Details Novel process for the preparation of ZSM-5 aluminosilicate zeoli Novel process for the preparation of ZSM-5 aluminosilicate zeoli

1986-07-14

1989-04-04

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423329, C01B 3328

Patent

active

048185078

ABSTRACT:
A method of manufacture of a ZSM-5 aluminosilicate zeolite is disclosed with specific ingredients in the crystallizing gel and which must be present in certain specified molar proportions. The aqueous gel comprises colloidal silica:colloidal alumina:Na.sub.3 PO.sub.4 :KF:water in a ratio of between 20 to 1 to 50 to 1 moles of colloidal silica to colloidal alumina and between 1.8 to 2.7 moles of Na.sub.3 PO.sub.4 per mole of colloidal alumina. It is preferred that greater than 0.5 to less than 2.04 moles of KF per mole of colloidal alumina is also present in the crystallizing gel. Variance from these ingredients or the relative stoichiometry of same results in the production of ferrierite, mordenite or an amorphorous aluminosilicate.

REFERENCES:
patent: 3758667 (1973-09-01), Kouwenhoven et al.
patent: 3933974 (1976-01-01), Winquist
patent: 4073865 (1978-02-01), Flanigen et al.

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