POLYETHYLENE PRODUCTION WITH MULTIPLE POLYMERIZATION REACTORS

摘要

A technique for polymerizing ethylene on catalyst in a first polymerization reactor and in a second polymerization reactor to form polyethylene particles, and controlling particle size of the polyethylene particles.

主权项

1. A method of operating a polyethylene reactor system, comprising:
polymerizing ethylene on catalyst in a first polymerization reactor to form intermediate particles having the catalyst and a first polyethylene; discharging the intermediate particles from the first polymerization reactor to a second polymerization reactor; polymerizing ethylene on the catalyst in the intermediate particles in the second polymerization reactor to form product particles having the catalyst, the first polyethylene, and the second polyethylene; discharging the product particles from the second polymerization reactor; and controlling a particle size of the product particles by adjusting a residence time of the catalyst through the first polymerization reactor and/or the second polymerization reactor.