Double loop technology

US8492489B2 · kind B2 · utility

Assignee

• Total Petrochemicals Research Feluy · BE

Inventors

• Louis Fouarge · Dilbeek, BE
• Eric Damme · Arquennes, BE
• Olivier Miserque · Mont-Saint-Guibert, BE
• Daniel Siraux · Naast, BE
• Philippe Bodart · Amay, BE
• Andre Lewalle · Brussels, BE
• Marc Van der Auwera · Tervuren, BE
• Frans Van den Brande · Mortsel, BE
• Giacomo Conti · Maurage, BE
• Hugo Vandaele · Sint-Andries, BE
• Mark Verleysen · Ekeren, BE
• Carl Van Camp · Beveren, BE
• Etienne Laurent · Seneffe, BE
• Philippe Marechal · Nivelles, BE
• Marc Moers · Ekeren, BE
• Leopold D'Hooghe · Kapellen, BE
• Marjan Sillis · Edegem, BE
• Kai Hortman · Dilbeek, BE
• Pascal Folie · Courcelles, BE
• Renaud Oreins · Wavre, BE

Key dates

• Filing date: Aug 24, 2010
• Grant date: Jul 23, 2013
• Expiry date: Aug 24, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86035
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for the copolymerization of ethylene and a C3+ olefin copolymer in a loop reactor system and polymers formed therefrom are described herein. The method generally includes introducing an ethylene monomer, a C3+ 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…