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:
Nov. 08, 2011
Filed:
Jul. 24, 2009
Bernie B. Osborne, Hurricane, WV (US);
Fred A. Conneway, Titusville, FL (US);
Clarence P. Stadlwieser, Sherwood Park, CA;
Harvey E. Andresen, Luling, LA (US);
Bernie B. Osborne, Hurricane, WV (US);
Fred A. Conneway, Titusville, FL (US);
Clarence P. Stadlwieser, Sherwood Park, CA;
Harvey E. Andresen, Luling, LA (US);
Dow Technology Investments LLC, Midland, MI (US);
Abstract
Systems and processes for recovering alkylene oxide, including an alkylene oxide recovery column including a stripping section located in the column to convert a portion of a feed stream to a gas phase including alkylene oxide; a reabsorption section in the column above the stripping section including a water stream to reabsorb the alkylene oxide in the gas phase portion and to produce an aqueous solution, a first stripping gas to strip carbon dioxide and oxygen from the aqueous solution by converting a portion of the aqueous solution to a gaseous portion, producing an alkylene oxide stream, and a side take-off located at a bottom portion of the reabsorption section for removal of the alkylene oxide stream; a condenser to partially condense the gas phase portion; and a top take-off for removal of a light impurity fraction.