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:
Feb. 03, 2009
Filed:
Aug. 22, 2006
Applicants:
Gary A. Sawyer, Media, PA (US);
Wayne J. Brtko, Glen Mills, PA (US);
Ronnie M. Hanes, Crofton, MD (US);
Brian A. Salisbury, Oxford, PA (US);
Inventors:
Gary A. Sawyer, Media, PA (US);
Wayne J. Brtko, Glen Mills, PA (US);
Ronnie M. Hanes, Crofton, MD (US);
Brian A. Salisbury, Oxford, PA (US);
Assignees:
Lyondell Chemical Technology, L.P., Greenville, DE (US);
Millennium Petrochemicals inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for removing aldehyde impurities from an acetic acid stream is disclosed. The method comprises reacting aldehyde impurities with a hydroxyl compound in a drying distillation column or a combined column to form corresponding acetals. The acetals are subsequently removed as heavy impurities from acetic acid by distillation.