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:
Apr. 04, 1995
Filed:
Sep. 07, 1993
Thomas Geiger, Ludwigshafen, DE;
Rainer Roemer, Laudenbach, DE;
Helmut Seifert, Ludwigshafen, DE;
Ulrich Traegner-Duehr, Trier, DE;
Ulrich Broeckel, Limburgerhof, DE;
Joachim Meyer, Maxdorf, DE;
Axel Griebel, Heidelberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for exploiting plastic wastes arising in the production or further processing or after use of the plastic, by, in a sewage treatment plant, comminuting the plastic wastes then mixing them with a sewage sludge to which organic flocculants are added with or without the addition of further amounts of finely divided coal and/or ash, if appropriate, modifying the surface properties of the plastic with binders in such a way that it binds better into the sludge, filtering the pretreated sludge mixture, where the plastic can assume the properties of a filtration aid, i.e. the filtering residue is reduced, incinerating the resulting filter cake, where the plastic assumes the function of an additional energy source and depositing the ash for example in a sanitary landfill or exploiting it.