Ultra high silicon-content zeolites and preparation thereof

Details Ultra high silicon-content zeolites and preparation thereof Ultra high silicon-content zeolites and preparation thereof

1976-05-20

1978-06-06

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

208120, B01J 2906

Patent

active

040935604

ABSTRACT:
A method is provided for obtaining crystalline dealuminized products by treating a slurry of a crystalline aluminosilicate zeolite in an aqueous solution of an ammonium or alkali metal salt which upon acidification yields an anion which complexes with aluminum by adding to said slurry a water-soluble acid having a first ionization constant greater than 10.sup.-2 at a rate such that a controlled amount of aluminum is removed from the zeolite to yield a resulting product from which at least about 10% and as much as about 85% of the initial aluminum has been removed while retaining more than 60% of the original crystallinity.

REFERENCES:
patent: 3442795 (1969-05-01), Kerr et al.

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