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:
Oct. 16, 1975
Applicant:
Inventors:
Theodor Ploetz, deceased, Late of Ratingen, D;
Ursula Haupt, Viersen, D;
Edeltraud Solich, Viersen, D;
Assignee:
Feldmuhle Anlagen- und Produktionsgesellschaft mit beschrankter Haftung, Duesseldorf-Oberkassel, D;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 28 ; 210 40 ; 162 29 ;
Abstract
The dissolution and loss of granular .gamma.-alumina in acidic water conted with the alumina for purification from lignin and its derivatives can be reduced or eliminated by adding to the acidic waste water an aluminum salt of mineral acid. A flocculate of aluminum hydroxide having the impurities adsorbed thereon is formed on the granular aluminum oxide, and is converted to .gamma.-alumina when the granular material is calcined in air for combustion of the organic waste material.