Patent ID: 7078364

Claim:
A solid catalyst comprising: a microporous framework comprising a silicoaluminophosphate molecular sieve having an average pore size of from about 3.5 to 5 angstroms and defined by nanocages, each such nanocage being accessible through a window that is smaller than the size of the nanocage; and an inorganic compound in at least one of the nanocages, wherein said inorganic compound is a product formed within said nanocages by a reaction of an inorganic molecule that has a kinetic diameter smaller than the kinetic diameter of the inorganic compound; and wherein the kinetic diameter of the inorganic molecule is less than the largest linear dimension of windows for accessing said nanocages but the kinetic diameter of the inorganic compound is greater than the largest linear dimension of said windows; said catalyst being effective to promote catalytic conversion of from about 50% to 98% of oxygenates in a feedstock to olefins.