Patent ID: 6821502
Filing Date: 2004-11-23
Classification: C01B

Abstract:
A method for preparing a zeolite having the IFR structure comprising:(a) preparing a reaction mixture comprising (1) a zeolite which is an active source of aluminum oxide, (2) an active source of alkali metal oxide, (3) an active source of an oxide of a tetravalent element, and (4) an organic template selected from the group consisting of a 1-benzyl-4-aza-1-azonia-bicyclo[2.2.2]octane cation and a N-benzyl quinuclidinium cation, wherein said reaction mixture has a composition in terms of mole ratios of oxides falling within the following ranges: YO2/Al2O3 about 5 to about 100 OHâˆ’/YO2 about 0.05 to about 0.50 Q/YO2 about 0.10 to about 1.0 M2/n/YO2 about 0.005 to about 0.50 H2O/YO2 about 3 to about 100 Q/Q+M2/n about 0.50 to about 0.95 wherein Y is silicon, germanium or mixtures thereof, Q is an 1-benzyl-4-aza-1-azonia-bicyclo[2.2.2]octane cation or N-benzyl quinuclidinium cation, M is an alkali metal cation or alkaline earth metal cation and n is the valence of M; and (b) maintaining the reaction mixture under conditions sufficient to form crystals of the IFR zeolite.