Invention Grant
- Patent Title: Method for regenerating an auxiliary filtering agent
- Patent Title (中): 再生辅助过滤剂的方法
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Application No.: US12443586Application Date: 2007-09-27
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Publication No.: US07993533B2Publication Date: 2011-08-09
- Inventor: Helmut Meffert , Marianna Pierobon , Tobias Petsch , Julia Brodersen , Hermann Josef Feise , Ates Erk , Jörg Kreβ , Ralf Mar , Robert Bayer
- Applicant: Helmut Meffert , Marianna Pierobon , Tobias Petsch , Julia Brodersen , Hermann Josef Feise , Ates Erk , Jörg Kreβ , Ralf Mar , Robert Bayer
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Connolly Bove Lodge & Hutz LLP
- Priority: EP06121563 20060929; EP07108932 20070525
- International Application: PCT/EP2007/060279 WO 20070927
- International Announcement: WO2008/037777 WO 20080403
- Main IPC: B01D37/02
- IPC: B01D37/02
Abstract:
Processes comprising: (i) providing a filter aid comprising a co-extrudate of a water-insoluble polyvinylpyrrolidone and a thermoplastic polymer, (ii) treating the filter aid with aqueous alkali; (iii) subsequently treating the filter aid with an enzyme; and (iv) subsequently thereto carrying out a second treatment with aqueous alkali, to provide a regenerated filter aid, and uses therefor.
Public/Granted literature
- US20090291164A1 METHOD FOR REGENERATING AN AUXILIARY FILTERING AGENT Public/Granted day:2009-11-26
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