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:
Apr. 15, 2014
Filed:
May. 19, 2010
Jason L. Noe, Mount Prospect, IL (US);
Lawrence E. Sullivan, Mount Prospect, IL (US);
Bruce R. Beadle, Kildeer, IL (US);
Edward M. Casey, Mount Prospect, IL (US);
Thomas J. Stoodt, Chicago, IL (US);
Jason L. Noe, Mount Prospect, IL (US);
Lawrence E. Sullivan, Mount Prospect, IL (US);
Bruce R. Beadle, Kildeer, IL (US);
Edward M. Casey, Mount Prospect, IL (US);
Thomas J. Stoodt, Chicago, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
The invention is a process and apparatus for removing a contaminant from an aromatic selective solvent. A feed stream comprising an aromatic hydrocarbon and a non-aromatic hydrocarbon is contacted with the aromatic selective solvent in an extractive distillation zone to produce a raffinate stream comprising the non-aromatic hydrocarbon, and a rich solvent stream comprising the aromatic hydrocarbon and the solvent. The rich solvent stream is separated in a second distillation zone to produce an extract stream comprising the aromatic hydrocarbon, and a lean solvent stream comprising the contaminant and the aromatic selective solvent. At least a portion of the lean solvent stream is washed with a non-aromatic hydrocarbon to produce a clean solvent stream, at least a portion of which is passed to at least one of the extractive distillation zone and the second distillation zone.