Process for the preparation of an alkylene carbonate and an alkylene glycol

US8858893B2 · kind B2 · utility

Assignee

• SHELL OIL COMPNY · US

Inventors

• Wayne Errol Evans · Richmond, US
• Martin Hess · Mainz, DE
• Marek Matusz · Houston, US
• Eugene Marie Godfried Andre Van Kruchten · Amsterdam, NL

Key dates

• Filing date: Aug 22, 2012
• Grant date: Oct 14, 2014
• Expiry date: Oct 30, 2032

Classification

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

Abstract

The invention provides a reaction system for the production of an alkylene carbonate comprising: an epoxidation zone containing an epoxidation catalyst located within an epoxidation reactor; a carboxylation zone containing an bromide-containing carboxylation catalyst located within an alkylene oxide absorber; and one or more purification zones containing a purification absorbent capable of reducing the quantity of bromide-containing impurities in a feed comprising a recycle gas, which purification zones are located upstream from the epoxidation zone; and a process for the production of an alkylene carbonate and an alkylene glycol.