Silicon substituted zeolite compositions and process for prepari

Details Silicon substituted zeolite compositions and process for prepari Silicon substituted zeolite compositions and process for prepari

1981-10-28

1985-03-05

Meros, Edward J.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

502 60, 502 85, 502 86, C01B 3328

Patent

active

045030235

ABSTRACT:
Aluminum from AlO.sub.4 -tetrahedra of as-synthesized zeolites is extracted and substituted with silicon to form zeolite compositions having higher SiO.sub.2 /Al.sub.2 O.sub.3 molar ratios and exhibiting distinctive chemical and physical properties. The preparative procedure involves contact of the starting zeolite with an aqueous solution of a fluorosilicate salt using controlled proportions and temperature and pH conditions which avoid aluminum extraction without silicon substitution.

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patent: 3933983 (1976-01-01), Elliott
patent: 4093560 (1978-06-01), Kerr
Breck "Zeolite Molecular Sieves" Copyright, 1974, pp. 507-518.

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