Method of removing dimethyl ether from an olefin stream

US7678958B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Minquan Cheng · Evansville, US
• Jeffrey J. Phillips · Houston, US
• Michael Nicoletti · Houston, US
• David Lumgair · Craddockville, US
• John Richard Shutt · Merchtem, BE
• Jeffrey Alan Kabin · Houston, US
• Wilfried Borgmann · Baierbrunn, DE
• Josef Kunkel · Gauting, DE
• Helmut Fritz · Munich, DE
• Roland Walzi · Feldafing, DE
• Gerhard Lauermann · Bad Tölz, DE
• Klaus Muller · Kirchseeon, DE

Key dates

• Filing date: Sep 30, 2002
• Grant date: Mar 16, 2010
• Expiry date: Feb 6, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C11/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention is directed to a method of removing dimethyl ether from an olefin stream. The method includes distilling the olefin stream so that the dimethyl ether is separated out of the olefin stream with propane. The olefin stream can then be further distilled to provide a polymer grade ethylene stream and a polymer grade propylene stream, with each stream containing not greater than about 10 wppm dimethyl ether.