Use of molecular sieves for the conversion of oxygenates to olefins
AssigneeExxonMobil Chemical Patents Inc.
InventorsStephen H. Brown, Richard B. Hall, Karl G. Strohmaier
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Abstract
This invention relates to a process for converting an oxygenate feedstock to light olefins using a crystalline metalloaluminophosphate molecular sieve having a high metal content and a small particle size. It also relates to crystalline metalloaluminophosphate molecular sieves with high metal content and a small particle size.
Claims13
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
- (ELxAlyPz)O2
- 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.
Dependencies are inferred from the claim text.