(19)

(11)

EP 0 881 941 A1

(12)

(43) Date of publication: 09.12.1998 Bulletin 1998/50 (21) Application number: 97904651.0 (22) Date of filing: 19.02.1997

(51) International Patent Classification (IPC):  B01D 63/ 02( . ) B01D 65/ 08( . ) B01D 63/ 06( . ) (86) International application number: PCT/NL1997/000074 (87) International publication number: WO 1997/030779 (28.08.1997 Gazette 1997/37)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 20.02.1996 NL 19961002397 (71) Applicant: STORK FRIESLAND B.V. 8401 DT Gorredijk (NL)	(72) Inventors: REITH, Thomas NL-7471 XZ Goor (NL) RACZ, Imre, Gyula NL-7522 HS Enschede (NL) OPHOFF, Jan NL-7545 NG Enschede (NL) REKERS, Casper, Johannes, Nicolaas NL-7772 JV Hardenberg (NL) (74) Representative: Iemenschot, Johannes Andreas, Ir., et al  van Exter Polak & Charlouis B.V., P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL)