Method of making aluminum-containing zeolite with IFR structure
AssigneeChevron U.S.A. Inc.
InventorsSaleh Elomari, Stacey Zones
Life of this patent
Estimating the term…
Abstract
Zeolites having the IFR structure and containing aluminum in their crystal structure can be made by preparing a reaction mixture comprising a zeolite which is an active source of aluminum oxide, an active source of alkali metal oxide, an active source of an oxide of a tetravalent element, 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, and maintaining the reaction mixture under conditions sufficient to form crystals of the zeolite.
Claims20
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
- OH−/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.
An essentially boron-free zeolite the IFR crystal structure and having a composition, as synthesized and in the anhydrous state, in terms of mole ratios as follows:
- YO2/Al2O3 about 5 to about 100
- OH−/YO2 about 0.05 to about 0.50
- Z/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
- Z/Z+M2/n about 0.50 to about 0.95
- wherein Y is silicon, germanium or a mixture thereof, M is an alkali metal cation, alkaline earth metal cation or mixtures thereof, n is the valence of M;
- and Z is a 1-benzyl-4-aza-1-azonia-bicyclo[2.2.2]octane cation.
A zeolite having the IFR crystal structure and having a composition, as synthesized and in the anhydrous state, in terms of mole ratios as follows:
- YO2/Al2O3 about 5 to about 100
- YO2/B2O3 about 5 to about 100
- OH−/YO2 about 0.05 to about 0.50
- Z/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
- Z/Z+M2/n about 0.50 to about 0.95
- wherein Y is silicon, germanium or a mixture thereof;
- M is an alkali metal cation, alkaline earth metal cation or mixtures thereof;
- n is the valence of M;
- and Z is a 1-benzyl-4-aza-1-azonia-bicyclo[2.2.2]octane cation and wherein the amount of aluminum is greater than the amount of boron.
Dependencies are inferred from the claim text.