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:
May. 21, 2002
Filed:
Sep. 18, 2000
Khaled A. M. Gasem, Stillwater, OK (US);
Robert L. Robinson, Jr., Stillwater, OK (US);
Christopher J. Schult, Columbia, MD (US);
Barbara A. Todd, Niotaze, KS (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A process for separating a first hydrocarbon, selected from the group consisting of aromatic hydrocarbons, cycloalkanes, cycloalkenes, cycloalkadienes and combinations thereof, from a close-boiling second hydrocarbon, selected from the group consisting of alkanes, alkenes, and alkadienes and combinations thereof, by extractive distillation of a hydrocarbon-containing fluid containing such hydrocarbons by using a solvent containing a 3-alkyl-substituted-2-oxazolidinone. Such aromatic hydrocarbons contain in the range of from about 6 to about 10 carbon atoms per molecule. Such cycloalkanes, cycloalkenes, cycloalkadienes, and close-boiling second hydrocarbon contain in the range of from about 4 to about 10 carbon atoms per molecule.