Method for the continuous production of 1,3-dioxolan-2-ones

US6265592A · kind A · utility

Assignee

• BASF SE

Inventors

• Stefan Birnbach · Ludwigshafen, DE
• Toni Dockner
• Jurgen Mohr · Grünstadt, DE
• Regina Benfer · Altrip, DE
• Walter Bieg · Grünstadt, DE
• Jarren Peters · Mannheim, DE
• Bernd Ruge · Böhl-Iggelheim, DE
• Werner Weinle · Friedelsheim, DE
• Peter Zehner · Ludwigshafen, DE

Key dates

• Filing date: Oct 30, 2000
• Grant date: Jul 24, 2001
• Expiry date: Oct 30, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D317/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the continuous production of 1,3-dioxolan-2-ones such as ethylene carbonate or propylene carbonate by reacting a corresponding oxirane with carbon dioxide in the liquid phase in the presence of a catalyst comprises conducting the reaction in a two-part reactor in whose first part the reaction is taken with backmixing to a conversion of not less than 80% of the oxirane II and in whose second part the reaction is completed under nonbackmixing conditions, and passing the carbon dioxide in countercurrent to the oxirane II in the entire reactor.