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:
Apr. 06, 2010
Filed:
Jul. 06, 2005
Hans-georg Goebbel, Kallstadt, DE;
Henning Schultz, Mannheim, DE;
Peter Schultz, Bad Duerkheim, DE;
Renate Patrascu, Stade, DE;
Malte Schulz, Hollern-Tw., DE;
Meinolf Weidenbach, Drochtersen, DE;
Hans-Georg Goebbel, Kallstadt, DE;
Henning Schultz, Mannheim, DE;
Peter Schultz, Bad Duerkheim, DE;
Renate Patrascu, Stade, DE;
Malte Schulz, Hollern-Tw., DE;
Meinolf Weidenbach, Drochtersen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
The Dow Chemical Company, Midland, MI (US);
Abstract
A method of separating propylene oxide from a mixture (M) comprising propylene oxide and methanol, said method comprising: (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing an extracting solvent into said extractive distillation column; (iii) distilling propylene oxide overhead from said extractive distillation column as top stream; (iv) withdrawing a bottoms stream from said extractive distillation column; (v) compressing the top stream obtained overhead in (iii) by means of at least one compressor to give a compressed vapor.