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Title: Alumina removal from crystalline alumino-silicates with Cr(III) solutions
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.
Other info: Inventors: Garwood, William E. (Haddonfield, NJ, US) Chen, Nai Yeun (Titusville, NJ, US) Lucki, Stanley J. (Runnemede, NJ, US) Application Number: 389109 Filing Date: 1973-08-17 Publication_date: 1976-02-10 Assignee: Mobil Oil Corporation (New York, NY) Primary Class(es): 423/714 208/120.15, 208/120.3, 423/118.1, 423/DIG21, 423/DIG25, 423/DIG26 Other Classes: US Patent Ref:
Other Refs: Other References: pansevich-Kolyada et al., Chemical Abstracts, Vol. 72, June 15, 1970, No. 125391w. Ermolenko et al., Chemical Abstracts, Vol. 64, 1966, Col. 17093c. | |