Importance

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Abstract

A process for increasing a settled bulk density of a granular polyolefin polymer includes feeding a catalyst stream into a gas phase polymerization reactor, the catalyst stream comprising catalyst particles, optionally in slurry form by suspending in a mineral oil and/or other hydrocarbon liquid, contained in a carrier fluid; feeding a support gas into the gas phase polymerization reactor together with the catalyst stream entering the reactor, the support gas being fed into the gas phase reactor at a velocity; forming polyolefin particles in the gas phase polymerization reactor through contact with the catalyst particles and a monomer and optionally one or more comonomers; and determining a settled bulk density of the granular polyolefin particles, and, based on the settled bulk density, selectively increasing or decreasing the velocity of the support gas in order to maintain the settled bulk density above a preset limit.

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First Claim