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. 02, 2013
Filed:
Aug. 06, 2012
John F. Szul, Hurricane, WV (US);
James H. Mccain, Charleston, WV (US);
Floyd L. Pfeffer, Canyon Lake, TX (US);
Harvey E. Andresen, Luling, LA (US);
Phillip R. Fairchild, Luling, LA (US);
Kent E. Newman, Scott Depot, WV (US);
John F. Szul, Hurricane, WV (US);
James H. McCain, Charleston, WV (US);
Floyd L. Pfeffer, Canyon Lake, TX (US);
Harvey E. Andresen, Luling, LA (US);
Phillip R. Fairchild, Luling, LA (US);
Kent E. Newman, Scott Depot, WV (US);
Dow Technology Investments LLC, Midland, MI (US);
Abstract
Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.