Olefin polymerization process with continuous discharging

US9765165B2 · kind B2 · utility

Assignee

• TOTAL RESEARCH & TECHNOLOGY FELUY · BE

Inventors

• Louis Fouarge · Dilbeek, BE
• Annelies Horre · Temse, BE
• Geert Nauwelaerts · Zoersel, BE
• Rudi Tanghe · Brecht, BE
• Johan Camiel Julia Janssens · Asse, BE
• Steven Beuckelaers · Breendonk, BE
• Marc Richet · Couvin, BE
• Pascal Wilderiane · Biercée, BE

Key dates

• Filing date: Jan 21, 2014
• Grant date: Sep 19, 2017
• Expiry date: Jul 20, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of a polyolefin in a slurry loop reactor provided with settling legs may include introducing olefin reactants, diluents, and polymerization catalyst into the reactor while circulating. The process may include polymerizing the olefin reactants to produce a slurry, continuously withdrawing the slurry, via the settling legs, and transferring withdrawn solid olefin polymer particles to a recovery section. Each settling leg may have an inlet connected to the reactor and an outlet connected to the recovery section. At least one settling leg is continuously open, allowing continuous withdrawal of slurry. Each outlet of the settling legs may be connected to the recovery section by a conduit provided with a pressure control device. The pressure in the reactor may be controlled by operating the pressure control device.