Substitution of Cr in place of Al in the framework of molecular

Details Substitution of Cr in place of Al in the framework of molecular Substitution of Cr in place of Al in the framework of molecular

1991-01-25

1993-02-16

Breneman, R. Bruce

Chemistry of inorganic compounds

Zeolite

Structure defined x-ray diffraction pattern

208 46, 208111, 208120, 208136, 208143, 585507, C01B 3334

Patent

active

051869187

ABSTRACT:
Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves invovles contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin. These compositions are effective as hydrocarbon conversion catalysts and for separating mixtures of molecular species.

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