Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1993-06-02
1995-05-02
McFarlane, Anthony
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423 63, 423 64, 423 71, 423 77, 423 79, C01B 3326, B01J 2906
Patent
active
054117240
ABSTRACT:
Aluminum can be removed from tetrahedral framework sites of zeolite frameworks and substituted with elements such as silicon, gallium, titanium or zirconium. The process involves three steps:
(a) forming a mixture of the ammonium or alkaline metal form of the zeolite in the hydrated state and a crystalline ammonium fluoro-halo-metallate salt;
(b) heating the mixture at elevated temperatures to remove the aluminum from the zeolite and to introduce the metal from the salt into the structure of the zeolitic component by solid-state reaction while forming a fluoro-halo-aluminate complex salt; and
(c) removing the formed fluoro-halo-aluminate complex salt.
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Beyer Herman K.
Pal-Borbely Gabriella
Johnson Beverly K.
McFarlane Anthony
W. R. Grace & Co.,-Conn.
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