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:
Jan. 20, 1976
Filed:
Sep. 03, 1974
Applicant:
Inventors:
Jacques Helgorsky, Fretillon, FR;
Michel Auroy, Chauny, FR;
Assignee:
Rhone-Progil, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 21 ; 2104 / ; 210705 ;
Abstract
A process for the treatment of waste waters from the preparation of phthalic esters of alcohols to reduce the BOD and recover alcohols comprising treating the waste water with a strong acid and then extracting the acidified waste water with an alcohol, preferably the same as the alcohol used to form the phthalic ester.