公开(公告)号：US3937791A

公开(公告)日：1976-02-10

申请号：US389109

申请日：1973-08-17

申请人： William E. Garwood ,  Nai Yeun Chen ,  Stanley J. Lucki

发明人： William E. Garwood ,  Nai Yeun Chen ,  Stanley J. Lucki

IPC分类号： B01J20/18 ,  C07C5/333 ,  C01B33/28 ,  B01J29/06

CPC分类号： B01J20/186 ,  C07C5/333 ,  B01J2229/16 ,  Y02P20/52 ,  Y10S423/21 ,  Y10S423/25 ,  Y10S423/26

摘要： 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.