Alumina removal from crystalline alumino-silicates with Cr(III)

Details Alumina removal from crystalline alumino-silicates with Cr(III) Alumina removal from crystalline alumino-silicates with Cr(III)

1973-08-17

1976-02-10

Vertiz, Oscar R.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423118, 252455Z, 208120, C01B 3328, B01J 2906

Patent

active

039377911

ABSTRACT:
A method of removing alumina from a crystalline aluminosilicate composition having a silica/alumina mole ratio of from above 3 to about 12 which comprises heating said aluminosilicate composition to a temperature of greater than 50.degree.C. to about 100.degree.C. in the presence of a cationic form of chromium, preferably Cr.sup.+.sup.3, in aqueous solution of above 0.01 Normal of a chromium salt of a mineral acid whereby the pH is less than 3.5, and such that the atomic ratio of chromium to aluminum is greater than 0.5 for a time sufficient to remove the alumina. The method of this invention permits the aluminosilicate composition to retain substantial crystallinity. Organic compound conversion with the dealuminized material formed by the method of this invention may be advantageously utilized.

REFERENCES:
patent: 3374182 (1968-03-01), Young
patent: 3459815 (1969-08-01), Noddings
patent: 3652459 (1972-03-01), Partasarathy
patent: 3691099 (1972-09-01), Young
patent: 3794600 (1974-02-01), Schutt
patent: 3803256 (1974-04-01), Kirsch et al.
patent: 3836561 (1974-09-01), Young
pansevich-Kolyada et al., Chemical Abstracts, Vol. 72, June 15, 1970, No. 125391w.
Ermolenko et al., Chemical Abstracts, Vol. 64, 1966, Col. 17093c.

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