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. 06, 1994
Filed:
Aug. 04, 1993
Applicant:
Inventors:
Thomas H Bossler, Washington Township, Westmoreland County, PA (US);
Donald Glassman, Mt. Lebanon Township, Allegheny County, PA (US);
Michael C Grebinoski, West Deer Township, Allegheny County, PA (US);
Howard H Morgan, Jr, Monroeville Boro, PA (US);
Jennifer L Voss, Bethel Park, PA (US);
Assignee:
Aristech Chemical Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 14 ; 203 18 ; 203 27 ; 203 33 ; 203 47 ; 203 48 ; 203 50 ; 203 98 ; 203D / ; 568749 ; 568759 ;
Abstract
Phenol plant waste water containing small amounts of phenol and sodium sulfate is successfully distilled through the addition of recovered sodium sulfate to enhance the volatility of the phenol relative to water; at least a portion of the sodium sulfate is recycled, while a significant portion of the phenol can be returned to the phenol plant for recovery.