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:
Dec. 21, 1976
Filed:
Apr. 10, 1975
Applicant:
Inventors:
Volker Franzen, Heidelberg, D;
Theodor Ploetz, Ratingen, D;
Ursula Haupt, Viersen, D;
Edeltraud Solich, Viersen, D;
Assignee:
Feldmuhle Anlagen- und Produktionsgesellschaft mit beschrankter Haftung, Duesseldorf-Oberkassel, D;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 32 ; 210 40 ; 210 33 ; 162 29 ;
Abstract
The biochemical oxygen demand of waste water from paper mills containing nin and other colloidally dispersed organic contaminants is sharply reduced by adsorption of the contaminants from the acidified waste water by granular alumina. The treatment is most effective at pH 2.5 and when the waste water is acidified with hydrochloric acid.