Process for preparing a polyethylene product in a polymerization loop reactor

摘要

A process for preparing polyolefin in a polymerization loop reactor can include feeding olefin monomer, liquid diluent, polymerization catalyst, optionally hydrogen, and optionally olefin co-monomer into the polymerization loop reactor. The process can include polymerizing the olefin monomer and optionally the olefin co-monomer to produce a polyolefin slurry in the polymerization loop reactor. The polymerization loop reactor can include a plurality of interconnected pipes defining a flow path for the polyolefin slurry. The polymerization loop reactor can include one or more settling legs provided on at least one horizontal part of the interconnected pipes. The circulation velocity of the polyolefin slurry inside at least one horizontal part of the interconnected pipes provided with one or more settling legs can be reduced by at least 20% and at most 60% compared to a circulation velocity inside a remainder of the polymerization loop reactor.

主权项

1. A process for preparing polyolefin in a polymerization loop reactor, said polymerization loop reactor comprising:
a plurality of interconnected pipes defining a flow path for a polyolefin slurry, and one or more settling legs provided on at least one horizontal part of said interconnected pipes, said process comprising: feeding olefin monomer, liquid diluent, polymerization catalyst, optionally hydrogen, and optionally olefin co-monomer into said polymerization loop reactor; and polymerizing said olefin monomer and optionally said olefin co-monomer to produce said polyolefin slurry in said polymerization loop reactor; wherein a circulation velocity of the polyolefin slurry inside the at least one horizontal part of said interconnected pipes provided with one or more settling legs is reduced by at least 20% and at most 60% compared to a circulation velocity inside a remainder of said polymerization loop reactor.