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:
Aug. 24, 2004
Filed:
Jul. 16, 2001
Applicant:
Inventor:
Sanjay P. Godbole, Solon, OH (US);
Assignee:
The Standard Oil Company, Warrenville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/14 ; B01D 3/38 ; C07C / ;
U.S. Cl.
CPC ...
B01D 3/14 ; B01D 3/38 ; C07C / ;
Abstract
A method for the purification of crude acetonitrile comprising distilling the crude acetonitrile in a first fractional distillation column at below atmospheric pressure, withdrawing a first side draw fraction comprising acetonitrile, distilling the first side draw fraction in a second fractional distillation column at super atmospheric pressure, and withdrawing from the second distillation a second side draw fraction comprising purified acetonitrile.