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:
Jul. 06, 1993
Filed:
Aug. 03, 1990
Jose A Vidueira, White Plains, NY (US);
UOP, Des Plaines, IL (US);
Abstract
Processes are disclosed for the separation of aromatic hydrocarbons from feedstreams containing mixtures of aromatic and non-aromatic hydrocarbons using extractive distillation with an aromatic selective solvent in order to separate the aromatic hydrocarbons from the non-aromatic hydrocarbons. A rich solvent stream comprising the aromatic hydrocarbons and solvent is withdrawn from the extractive distillation column and passed to a steam stripping column to provide a regenerated lean solvent stream, a side-cut stream comprising the aromatic hydrocarbons and a stripper overhead stream comprising non-aromatic hydrocarbons which are passed as a reflux stream to the extractive distillation column. Various solvents are disclosed and an especially preferred solvent is sulfolane.