Methods of catalyst activation

US10647796B2 · kind B2 · utility

Assignee

• Fina Technology, Inc. · US

Inventors

• Kenneth P. Blackmon · Houston, US
• David Ribour · Mons, BE
• Shabbir Malbari · Houston, US
• Tim Coffy · Houston, US
• Michel Daumerie · Houston, US

Key dates

• Filing date: Feb 8, 2019
• Grant date: May 12, 2020
• Expiry date: Feb 8, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method comprising preparing a multi-component catalyst system comprising a catalyst and a cocatalyst, and adjusting the level of at least one component of the catalyst system to maintain a user-desired level of catalyst activity throughout a process, wherein the component comprises a catalyst activator and wherein the catalyst activator comprises the catalyst or the cocatalyst. A method comprising contacting a polymerization catalyst system comprising a Ziegler-Natta catalyst and a cocatalyst with a catalyst activator at least twice during a polymerization process, wherein the polymerization process is carried out in a reactor system comprising multiple reactor types.