Process for de-polymerization of styrenic monomer-containing polymers and for retrieval of styrenic monomers

US11999686B2 · kind B2 · utility

Assignee

• INEOS STYROLUTION GROUP GMBH · DE

Inventors

• Norbert Niessner · Friedelsheim, DE
• Bianca WILHELMUS · Hanau, DE
• Hannes KERSCHBAUMER · Bad Soden am Taunus, DE
• Michiel VERSWYVEL · Mechelen, BE
• Petra Inghelbrecht · Laarne, BE
• Thomas W. COCHRAN · Channahon, US
• KyungHo Shon · Nam-dong, KR
• Mohammed Abboud · Riverside, US
• Ricardo Cuetos · Naperville, US
• Hans-Dieter Schwaben · Freisbach, DE
• Jens Kathmann · Worb, CH
• Thad Urquhart · Seabrook, US
• Timothy A. Brown · League City, US
• Tim T. Wong · League City, US
• Walter DE VET · Langereit, NL
• Hans-Werner Schmidt · Bayreuth, DE
• Andreas SCHEDL · Bayreuth, DE
• Tristan Kolb · Bayreuth, DE

Key dates

• Filing date: Jan 7, 2020
• Grant date: Jun 4, 2024
• Expiry date: May 31, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to an improved process for providing purified styrenic monomers, such as styrene, from styrene-containing polymer waste. Styrene-containing waste is depolymerized in a suitable reactor, and the depolymerization products are condensed and separated in a three-step distillation process.