Process and plant for manufacturing polyethylene-diene-copolymers

US9255159B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Bernt-Ake Sultan · Lund, SE
• Bjoern Voigt · Onsala, SE
• Perry Nylander · Jönköping, SE
• Thomas Hjertberg · Kungshamn, SE
• Kristian Dahlen · Stora Höga, SE
• Mattias Bergqvist · Gothenburg, SE
• Martin Anker · Karlskrona, SE
• Kjell Fossum · Stenungsund, SE

Key dates

• Filing date: Mar 7, 2013
• Grant date: Feb 9, 2016
• Expiry date: Mar 7, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a process for manufacturing polyethylene-diene-copolymer conducted in a plant including at least one compressor unit, at least one preheater unit downstream of the compressor unit and at least one reactor, in particular a reactor, downstream of the compressor unit and the preheater unit. The process comprising the steps of (a) feeding a first feed stream comprising ethylene into the at least one compressor unit and subsequently into the at least one preheater unit, and (b1) feeding a second feed stream including at least one diene comonomer to the first feed stream leaving the at least preheater unit, and feeding the combined feed streams including ethylene and the at least one diene comonomer to the at least one reactor, and/or (b2) feeding a second feed stream including at least one diene comonomer to the at least one reactor at at least one location along the reactor.