Method for continuously operated pure distillation of oxiranes, especially propylene oxide

US7550064B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Peter Bassler · Viernheim, DE
• Hans-Georg Goebbel · Kallstadt, DE
• Joaquim Henrique Teles · Waldsee, DE
• Peter Rudolf · Ludwigshafen, DE

Key dates

• Filing date: Jul 23, 2003
• Grant date: Jun 23, 2009
• Expiry date: Jul 3, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a continuously operated process for the purification by distillation of the oxirane formed in the oxirane synthesis by reaction of a hydroperoxide with an organic compound, wherein the crude oxirane is separated in a dividing wall column into low-, intermediate- and high-boiling fractions and the oxirane is taken off as intermediate boiler at the side offtake in a concentration of at least 99.9%.