Activity monitoring and polymerization process control

US9562125B2 · kind B2 · utility

Assignee

• Arlanxeo Deutschland GmbH · DE

Inventors

• Ursula Tracht · Leverkusen, DE
• Ricarda Leiberich · Langen, DE
• Michael Berger · Jerusalem, IL
• Hanns-Ingolf Paul · Leverkusen, DE
• Udo Wiesner · Bornheim, DE

Key dates

• Filing date: Sep 23, 2011
• Grant date: Feb 7, 2017
• Expiry date: Feb 28, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2400/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity. In a further aspect the invention relates to a controlled process for the preparation of polymers in a polymerization reactor by contacting liquid feed streams comprising monomers and initiators or catalysts, whereby the control of the feed streams entering the polymerization reactor and/or the initiator or catalyst preparation is carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity within the polymerization reactor. M…