Process for the regeneration of a titanium zeolite catalyst for propylene epoxidation

US10195598B2 · kind B2 · utility

Assignees

• BASF SE
• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Dominic RIEDEL · Ludwigshafen, DE
• Joaquim Henrique Teles · Waldsee, DE
• Daniel Urbanczyk · Ludwigshafen, DE
• Ulrike Wegerle · Worms, DE
• Luise Spiske · Seeheim-Jugenheim, DE
• Andrei-Nicolae Parvulescu · Ludwigshafen am Rhein, DE
• Alexander Schroeder · Wattenheim, DE
• Ulrich Mueller · Hamburg, DE
• Meinolf Weidenbach · Stade, DE
• Werner J. Witzl · Stade, DE

Key dates

• Filing date: Feb 12, 2016
• Grant date: Feb 5, 2019
• Expiry date: Feb 12, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to process for the regeneration of a catalyst comprising a titanium containing zeolite as catalytically active material comprising a stage comprising introducing a feed stream comprising propene, hydrogen peroxide or a hydrogen peroxide source, and an organic solvent into a reactor containing a catalyst comprising the titanium containing zeolite, subjecting the feed stream in the reactor to epoxidation conditions in the presence of the catalyst, removing a product steam comprising propylene oxide and the organic solvent from the reactor, stopping introducing the feed stream, washing the catalyst with a liquid aqueous system and calcining the washed catalyst.