Process for the activation of a supported chromium oxide based catalyst

US9006363B2 · kind B2 · utility

Assignee

• INEOS SALES (UK) LIMITED · GB

Inventors

• Christophe Moineau · Nivelles, BE
• Stephan Detournay · Wemmel, BE

Key dates

• Filing date: Oct 5, 2011
• Grant date: Apr 14, 2015
• Expiry date: Nov 4, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the activation of a supported chromium oxide based catalyst in a fluidized bed activation reactor which has a catalyst bed being fluidized by a fluidization gas. The activation includes treatment at temperatures above 500° C., in which in an initial stage, where there is an initial temperature increase, the fluidization velocity (Vf1) of the fluidization gas is maintained below 6.5 centimeters per second (cm/sec) until the temperature inside the activation reactor reaches at least 200° C., and the fluidization gas is then brought to a value (Vf2) which is at least 1 cm/sec higher than Vf1.