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:
Mar. 21, 1995
Filed:
Dec. 06, 1993
Applicant:
Inventors:
Joseph C Gentry, Dallas, TX (US);
Lloyd Berg, Bozeman, MT (US);
John C McIntyre, Hackettstown, NJ (US);
Randa W Wytcherley, Belgrade, MT (US);
Assignee:
Glitsch, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 23 ; 203 51 ; 203 53 ; 203 56 ; 203 57 ; 203 58 ; 203 60 ; 203 63 ; 203 64 ; 203 69 ; 203 78 ; 203 79 ; 203 84 ; 585807 ; 585808 ; 585857 ; 585860 ; 585862 ; 585864 ; 585865 ; 585866 ; 585867 ;
Abstract
Benzene and other aromatics are separated from a stream of mixed hydrocarbons containing both aromatics and non-aromatics by extractive distillation with a solvent system containing dimethyl sulfoxide and optionally a co-solvent, preferably water, followed by distillation stripping of the aromatics from the enriched solvent system, and recycle of the lean solvent system to the extractive distillation step.