Patent ID: 6770791
Filing Date: 2004-08-03
Classification: C07C,C12C

Abstract:
A method of converting an oxygenate to a dimerized or oligomerized olefin product, comprising:contacting oxygenate with a silicoaluminophosphate molecular sieve catalyst to form an olefin product; separating a propylene, butylene or pentylene containing olefin stream from the olefin product, wherein the separated olefin stream comprises at least 50 wt. % propylene, butylene, pentylene, or a combination thereof, and the separated olefin stream contains not greater than 1 ppm by weight sulfur calculated on an atomic basis, and 25 to 10 wt. % isoolefin; and contacting the separated olefin stream with a nickel based oligomerization catalyst to form a dimer or oligomer product.