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:
Mar. 12, 2013
Filed:
Mar. 14, 2008
Helmut Meffert, Bobenhoim am Berg, DE;
Marianna Pierobon, Ludwigshafen, DE;
Tobias Petsch, Mörschied, DE;
Julia Brodersen, Mannheim, DE;
Hermann Josef Feise, Kleinniedesheim, DE;
Ates Erk, Karlsruhe, DE;
Jörg Kreβ, Mannheim, DE;
Ralf Mar, Hochspeyer, DE;
Ralf Lachmuth, Bobenheim am Berg, DE;
Robert Bayer, Sinsheim, DE;
Helmut Meffert, Bobenhoim am Berg, DE;
Marianna Pierobon, Ludwigshafen, DE;
Tobias Petsch, Mörschied, DE;
Julia Brodersen, Mannheim, DE;
Hermann Josef Feise, Kleinniedesheim, DE;
Ates Erk, Karlsruhe, DE;
Jörg Kreβ, Mannheim, DE;
Ralf Mar, Hochspeyer, DE;
Ralf Lachmuth, Bobenheim am Berg, DE;
Robert Bayer, Sinsheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
Methods for regenerating filter aids which comprise inorganic, natural or semisynthetic filter aids. The method comprises subjecting the filter aid to a first treatment with an aqueous alkaline solution, treating the filter aid with enzymes, treating the filter aid with a surfactant, and subjecting the filter aid a second treatment with the aqueous alkaline solution. The enzyme treatment and the surfactant treatment steps may be carried out simultaneously or in any order.