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:
Sep. 03, 1996
Filed:
Dec. 15, 1993
Applicant:
Inventor:
Shaojun J Zhou, Palatine, IL (US);
Assignee:
AlliedSignal Inc., Morris Township, Morris County, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203 18 ; 159D / ; 203 86 ; 203D / ; 21050027 ; 210640 ; 21050038 ; 568868 ;
Abstract
Recovery of ethylene glycol from dilute aqueous solutions is accomplished by passing the solution over the surface of a porous hydrophobic membrane capable of passing water vapor but not liquid water. The pressure and temperature provide a positive driving force for the movement of water vapor through the membrane to the opposite face where it is removed by condensation or a stream of gas or liquid. Preliminary concentration of the aqueous solutions may be provided by use of reverse osmosis membrane. The method is useful in the reclamation of spent deicing fluid.