Patent ID: 7009086
Filing Date: 2006-03-07
Classification: B01J,C07C,C10G

Abstract:
1. A process for converting an oxygenate feedstock to light olefins which comprises contacting the oxygenate feedstock under catalytic conversion conditions with a catalyst, the catalyst comprising a crystalline metalloaluminophosphate molecular sieve having a chemical composition on an anhydrous basis expressed by an empirical formula of where EL is a metal selected from the group consisting of silicon, germanium and mixtures thereof, “x” is the mole fraction of EL and has a value of greater than 0.05, “y” is the mole fraction of Al and has a value of at least 0.01, “z” is the mole fraction of P and has a value of at least 0.01 and x+y+z=1 and wherein x/y is greater than 0.15, the molecular sieve crystals having at least one crystal dimension of less than 0.2 micron.