Patent ID: 7326821

Claim:
A process for forming a polyolefin, the process comprising the steps of: i) providing an oxygenate stream for conversion to olefins; ii) removing at least a portion of the oxygenate from the olefin stream to form a reduced-oxygenate olefin stream by the following steps: a) providing an olefin stream, wherein the olefin stream contains oxygenate, and the olefin stream is comprised of greater than 50 wt % ethylene and propylene, and wherein the olefin stream comprises not greater than 5 wt % butane; and b) contacting the provided olefin stream with a solid adsorbent to remove oxygenate from the provided olefin stream, wherein the solid adsorbent has an oxygenate adsorption capacity of at least 0.1 wt % and a cumulative oligomer selectivity of not greater than 5 wt %, wherein the solid adsorbent comprises at least one ion from Group 2, 4, 6, 12, 13, 14 or 15 of the Periodic Table of the Elements; and iii) polymerizing one or more olefins in the reduced-oxygenate olefin stream, optionally in conjunction with one or more olefins from a source other than the olefin stream, in the presence of a polyolefin-forming catalyst under conditions sufficient to form a polyolefin.