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. 24, 1996
Filed:
Sep. 14, 1995
Applicant:
Inventors:
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210774 ; 210805 ; 210790 ; 210767 ; 62 66 ; 62532 ; 62541 ;
Abstract
A process for the treatment of a wastewater feed originating from a styrene/propylene oxide production plant and containing hydrocarbons, aldehydes, ketones, alcohols, phenols and salts, by freeze-concentration combined with salt crystals removal, thereby separating the wastewater feed into an at least two-fold concentrated waste product, salt crystals, and a substantially pure water product.