Patent ID: 7332636

Claim:
A process for producing light olefins, the process comprising the steps of: contacting an oxygenate with a molecular sieve catalyst composition and converting at least a portion of the oxygenate to a reaction product comprising light olefins and less than about 10 weight percent oxygenate byproducts, based on the total weight of the reaction product, wherein the molecular sieve catalyst composition contains a matrix material, the matrix material containing at least one of (i) less than 10,000 wppm of iron and iron-containing species, (ii) less than 15,000 wppm of titanium and titanium-containing species, (iii) less than 1,500 wppm of nickel and nickel-containing species, (iv) less than 1,500 wppm of cobalt and cobalt-containing species, (v) less than 1,500 wppm of manganese and manganese-containing species, and (vi) less than 1,500 wppm of vanadium and vanadium-containing species, based on the total weight of the matrix material.