| 摘要 |
An improved method of synthesizing large pore zeolites is disclosed and claimed. The method comprises preparing a reaction mixture containing a source zeolite on alkali metal, nitrogen containing organic cation, a source of silica, and water, and having the following composition in terms of the mole ratios: M+/SiO2 = 0.01-1.00, OH-/SiO2 = 0.15-0.80, H2O/SiO2 = 20-120; Q/SiO2 = 0.10-1.00, SiO2/Y2O3 = greater than 8; wherein M+ is an alkali metal not supplied by the source zeolite, Q is an organic template, and Y is a mixture of aluminum from the source zeolite, wherein said source zeolite contains soda lite substructures having tetrahedra atom densities of less than about 15 TO2 per 1000 AA3; maintaining the reaction mixture at crystallization temperature until crystals are formed; and recovering the crystals. |
