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:
Jan. 23, 2001
Filed:
Jan. 27, 1999
Applicant:
Inventors:
David C. DeCoster, Buckley, WA (US);
Eustathios Vassiliou, Newark, DE (US);
Mark W. Dassel, Indianola, WA (US);
Ader M. Rostami, Bainbridge Island, WA (US);
Assignee:
RPC Inc., Atlanta, GA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N 8/08 ;
U.S. Cl.
CPC ...
G01N 8/08 ;
Abstract
This invention relates to methods and devices for removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitated by introduction of additional cyclohexane. The removal of acetic acid is preferably conducted by use of rather small amounts of wash-water in one to three stage extractors. A two stage reactor is preferable as being more efficient.