(19)

(11)

EP 1 979 066 A1

(12)

(43) Date of publication: 15.10.2008 Bulletin 2008/42 (21) Application number: 06818902.6 (22) Date of filing: 29.11.2006

(51) International Patent Classification (IPC):  B01D 39/20(2006.01) (86) International application number: PCT/EP2006/011449 (87) International publication number: WO 2007/079829 (19.07.2007 Gazette 2007/29)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 09.01.2006 EP 06000279 (71) Applicant: NV Bekaert SA 8550 Zwevegem (BE)	(72) Inventor: VANDAMME, Johan B-9800 Deinze (BE) (74) Representative: Bird, Ariane  Bird Goën & Co Klein Dalenstraat 42A 3020 Winksele 3020 Winksele (BE)