Preparation of zeolites of type ZSM-5

Details Preparation of zeolites of type ZSM-5 Preparation of zeolites of type ZSM-5

1986-12-22

1990-01-02

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C01B 3328

Patent

active

048911992

ABSTRACT:
Zeolites of type ZSM-5, well suited as absorbents/catalysts, are facilely prepared by (i) intimately admixing a source of alumina with a source of silica, in aqueous reaction medium having a pH ranging from 1 to 7 and wherein the molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 ranges from 5 to 100, (ii) adding a source of alkali metal oxide to the reaction mixture resulting from said stage (i), said combined reaction mixture having a pH ranging from 8 to 12, and thence (iii) crystallizing a zeolite of type ZSM-5 therefrom.

REFERENCES:
patent: 4164551 (1979-08-01), Elliot, Jr.
patent: 4166099 (1979-08-01), McDaniel et al.
patent: 4175114 (1979-11-01), Plank et al.
patent: 4257885 (1981-03-01), Grose et al.
patent: 4526879 (1985-07-01), Dwyer et al.
patent: 4562055 (1985-12-01), Arika et al.
patent: 4578259 (1986-03-01), Morimoto et al.
Kvei-Tung Chao et al, "Kinetic Studies on the Formation of Zeolite ZSM-5", J. Chem. Soc. Faraday Trans. 1, 1981 77 547-555.
Ryszard Mostowicz et al, "Crystallization of ZSM-5 with Relatively High (Me.sub.2
).sub.2 O/(TPA).sub.2 O Reactant Ratios", Zeolites vol. 2, No. 2 Apr. 1982 pp. 143-146.

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