Process for purifying propylene oxide

US10544116B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Joaquim Henrique Teles · Waldsee, DE
• Marvin KRAMP · Ludwigshafen, DE
• Christian Mueller · Wiesbaden, DE
• Nicolai Tonio Woerz · Darmstadt, DE
• Bernd Metzen · Ludwigshafen am Rhein, DE
• Tobias Keller · Dittelsheim-Heßloch, DE
• Dominic RIEDEL · Ludwigshafen, DE
• Markus Weber · Langenfeld, DE
• Daniel Urbanczyk · Ludwigshafen, DE
• Andrei-Nicolae Parvulescu · Ludwigshafen am Rhein, DE
• Ulrike Wegerle · Worms, DE
• Ulrich Mueller · Hamburg, DE

Key dates

• Filing date: Jul 19, 2017
• Grant date: Jan 28, 2020
• Expiry date: Jul 19, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D303/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein is a process for purifying propylene oxide, including the steps of: (i) providing a stream S0 containing propylene oxide, acetonitrile, water, and an organic compound containing a carbonyl group —C(═O)—; and (ii) separating propylene oxide from the stream S0 by subjecting the stream S0 to distillation conditions in a distillation column to obtain a gaseous top stream S1c which is enriched in propylene oxide compared to the stream S0, a liquid bottoms stream S1a which is enriched in acetonitrile and water compared to the stream S0, and a side stream S1b containing propylene oxide which is enriched in the carbonyl compound compared to the stream S0.