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. 03, 1978
Filed:
Dec. 07, 1976
Applicant:
Inventors:
Heinz-Dieter Hahn, Oberhausen, DT;
Jurgen Weber, Oberhausen, DT;
Assignee:
Ruhrchemie AG, Oberhausen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 98 ; 210 71 ; 560 78 ; 560191 ; 560204 ;
Abstract
A process for removing organic components from the waste water effluent obtained in the production of an ester plasticizer through esterification of a polybasic aliphatic or aromatic carboxylic acid with an aliphatic alcohol in the presence of a sulfuric acid catalyst, which waste water contains an alkyl hydrogen sulfate or a dialkyl sulfate, esterification reactants and esterification products, which comprises: A. heating said waste water to a temperature above 200.degree. C under the particular prevailing pressure; and B. thereafter thermally or mechanically removing an organic phase from an aqueous phase.