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:
Oct. 26, 2004
Applicants:
Andrew P. Kahn, Eagleville, PA (US);
David W. Leyshon, West Chester, PA (US);
Shaw-chan Lin, West Chester, PA (US);
Edward P. Carey, Atglen, PA (US);
Inventors:
Andrew P. Kahn, Eagleville, PA (US);
David W. Leyshon, West Chester, PA (US);
Shaw-Chan Lin, West Chester, PA (US);
Edward P. Carey, Atglen, PA (US);
Assignee:
Lyondell Chemical Technology, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
N-(2-hydroxyethyl)-2-pyrrolidone (HEP) is purified by a distillation sequence in which the purified HEP is recovered as a side stream without being separated as an overhead at any point in the procedure.