Method for regenerating a filter aid

US8394279B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Helmut Meffert · Mannheim, DE
• Marianna Pierobon · Ludwigshafen, DE
• Tobias Petsch · Morbach, DE
• Julia Brodersen · Hamburg, 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

Key dates

• Filing date: Mar 14, 2008
• Grant date: Mar 12, 2013
• Expiry date: Feb 10, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2220/4831
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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.