Propene recovery by scrubbing with a solvent/water mixture

US11180467B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Apr 13, 2018
• Grant date: Nov 23, 2021
• Expiry date: Jun 14, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, propane, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propane, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propene, propane, propylene oxide, water, and the organic solvent; (iv) separating propene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous stream (S1) which is enriched in propene and propane compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream (S2) which is enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; …