Patent ID: 7922996

Claim:
A process for producing a crystalline metallosilicate composition, the process comprising the steps of: (a) providing a two-phase liquid medium comprising an aqueous liquid phase and a non-aqueous liquid phase, the two-phase liquid medium further comprising at least one silicon-containing compound and at least one metal-containing compound, wherein the at least one silicon-containing compound is present in both the aqueous liquid phase and the non-aqueous liquid phase, and the at least one metal-containing compound is present in substantially the aqueous liquid phase; and (b) crystallising the crystalline metallosilicate composition from the two-phase liquid medium; wherein each crystallite has an outer surface and an inner part; and the metallosilicate composition has a continuous spatial distribution of silicon to metal, and an atomic ratio of silicon to metal that decreases continuously from the outer surface to the inner part of each crystallite.