Process for inserting silicon into zeolite frameworks

Details Process for inserting silicon into zeolite frameworks Process for inserting silicon into zeolite frameworks

1990-12-14

1992-03-31

Breneman, R. Bruce

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

502 85, 502 86, C01B 3334

Patent

active

051006448

ABSTRACT:
The removal of aluminum and silicon atoms from the framework of crystalline zeolites and the reinsertion of at least some of the removed silicon atoms into the sites vacated by extracted aluminum atoms is accomplished by the process of contacting the zeolite with an aqueous solution of a bifluoride salt, preferably ammonium bifluoride. The treated zeolites have higher crystal destruction temperatures than their precursor starting zeolites.

REFERENCES:
patent: 2331473 (1943-10-01), Hyman
patent: 3493519 (1970-02-01), Kerr et al.
patent: 3594331 (1971-07-01), Elliott, Jr.
patent: 3933983 (1976-01-01), Elliott, Jr.
patent: 4596704 (1986-06-01), Miale et al.
patent: 4943545 (1990-07-01), Chang et al.

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