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. 17, 2009
Filed:
Aug. 26, 2003
Applicants:
Mark Clark Cesa, South Euclid, OH (US);
Paul Alan Jacobson, Victoria, TX (US);
Richard Lee Wappelhorst, Port Lavaca, TX (US);
Inventors:
Mark Clark Cesa, South Euclid, OH (US);
Paul Alan Jacobson, Victoria, TX (US);
Richard Lee Wappelhorst, Port Lavaca, TX (US);
Assignee:
INEOS USA LLC, Lisle, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 253/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process of producing HPLC grade acetonitrile (UV cutoff<190) comprising a multistep distillation under reflux conditions followed by acidic ion exchange resin treatment to remove essentially all impurities from the acetonitrile.