The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2010
Filed:
Sep. 30, 2002
Minquan Cheng, Evansville, IN (US);
Jeffrey J. Phillips, Houston, TX (US);
Michael Peter Nicoletti, Houston, TX (US);
David Ritchie Lumgair, Jr., Craddockville, VA (US);
John Richard Shutt, Tervuren, BE;
Jeffrey Alan Kabin, Houston, TX (US);
Wilfried Borgmann, Baierbrunn, DE;
Josef Kunkel, Bauting, DE;
Helmut Fritz, Munich, DE;
Roland Walzi, Feldafing, DE;
Gerhard Lauermann, Bad Tolz, DE;
Klaus Muller, Kirchseeon, DE;
Minquan Cheng, Evansville, IN (US);
Jeffrey J. Phillips, Houston, TX (US);
Michael Peter Nicoletti, Houston, TX (US);
David Ritchie Lumgair, Jr., Craddockville, VA (US);
John Richard Shutt, Tervuren, BE;
Jeffrey Alan Kabin, Houston, TX (US);
Wilfried Borgmann, Baierbrunn, DE;
Josef Kunkel, Bauting, DE;
Helmut Fritz, Munich, DE;
Roland Walzi, Feldafing, DE;
Gerhard Lauermann, Bad Tolz, DE;
Klaus Muller, Kirchseeon, DE;
ExxonMobil Chemical Patents Inc, Houston, TX (US);
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.