Dealumination of aluminosilicate zeolites

Details Dealumination of aluminosilicate zeolites Dealumination of aluminosilicate zeolites

1987-02-17

1988-06-28

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Activating treatment

423328, B01J 2906

Patent

active

047539100

ABSTRACT:
In a method of removing tetrahedral aluminum from a aluminosilicate zeolite, the zeolite is treated with an aqueous fluorosilicate solution which reacts with tetrahedral aluminum in said zeolite to produce water-insoluble aluminum fluoride. In addition, during or after the aluminum removal, the zeolite is contacted with an aqueous solution containing a water-soluble fluoride of reacting with the insoluble aluminum fluoride to produce a water-soluble species.

REFERENCES:
patent: 3933983 (1976-01-01), Elliott
patent: 4414189 (1983-11-01), Kokotailo et al.
patent: 4503023 (1985-03-01), Breck
patent: 4569833 (1986-02-01), Gortsema et al.
patent: 4597956 (1986-07-01), Hinchey et al.
patent: 4678766 (1987-07-01), Rosinski

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