Total Petrochemicals Research Feluy

André Lewalle

Daniel Siraux

Louis Fouarge

Daan Dewachter

Eric Damme

Philippe J Bodart

Olivier Miserque

Renaud Oreins

Philippe Marechal

Hugo Vandaele

Etienne Laurent

Marc Moers

Marc Van Der Auwera

Pascal Folie

Mark Verleysen

Carl Van Camp

Frans Van Den Brande

Giacomo Conti

Kai Hortman

Leopold D'Hooghe

Marjan Sillis

A method for the copolymerization of ethylene and a C+ olefin copolymer in a loop reactor system and polymers formed therefrom are described herein. The method generally includes introducing an ethylene monomer, a C+ alpha olefin comonomer and a diluent carrier liquid into a reactor system comprising at least one loop reactor; supplying at least one polymerization catalyst system to said reactor system; circulating said diluent liquid, ethylene monomer, and alpha olefin copolymer through said loop reactor while copolymerizing said ethylene and said alpha olefin monomer in the presence of said catalyst system to produce a slurry of polymer fluff particles in said diluent carrier liquid; diverting the flow of said slurry through said loop reactor into at least one settling leg connected to the loop reactor and sequentially discharging the settled polymer slurry from said at least one settling leg to withdraw said polymer slurry from said reactor system; and introducing an ethylene monomer co-feed into said loop reactor at least two spaced locations downstream of the point of introduction of ethylene comonomer and diluent in subparagraph a), said ethylene co-feed being introduced in an amount effective to reduce the variation in the ratio of ethylene monomer and comonomer within said loop reactor.

Double loop technology

This invention is related to the field of olefin polymerisation in double loop reactors and especially to the polymerisation of olefins with very active catalyst systems. It discloses a method for reducing blockage when transferring polymer product from the first loop to the second loop of a double loop reactor.

Reduced blockage when transferring polymer product from one reactor to another

Growing community of inventors

Brussels, Belgium

André Lewalle