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:
Jul. 03, 2007
Filed:
Nov. 12, 2002
Wilfried Borgmann, Baierbrunn, DE;
Josef Kunkel, Bauting, DE;
Helmut Fritz, Munich, DE;
Gerhard Lauermann, Bad Tolz, DE;
Roland Walzl, Feldafing, DE;
Klaus Muller, Kirchseeon, DE;
Wilfried Borgmann, Baierbrunn, DE;
Josef Kunkel, Bauting, DE;
Helmut Fritz, Munich, DE;
Gerhard Lauermann, Bad Tolz, DE;
Roland Walzl, Feldafing, DE;
Klaus Muller, Kirchseeon, DE;
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
A method for processing an olefin-containing product stream that contains dimethyl ether as a by-product is described. Such a product stream arises, for example, in the synthesis of olefin from methanol. For separation of the dimethyl ether from the product stream, it is proposed that at least a partial stream chiefly containing Chydrocarbons is separated from the product stream by fractionation, and is sent to a rectification column (Csplitter) () for separation of propylene and propane. The dimethyl ether goes together with the propane into the bottom of the rectification column in the rectification process and can be withdrawn (). A substantially pure propylene product (), which contains at most only traces of dimethyl ether, can be removed from the top of the rectification column.