(19)

(11)

EP 0 979 214 A1

(12)

(43) Date of publication: 16.02.2000 Bulletin 2000/07 (21) Application number: 98920772.5 (22) Date of filing: 22.04.1998

(51) International Patent Classification (IPC)7: C02F 11/12, B01D 29/50 (86) International application number: PCT/SE9800/731 (87) International publication number: WO 9849/107 (05.11.1998 Gazette 1998/44)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT (30) Priority: 29.04.1997 SE 9701633 (71) Applicant: Pougus AB 802 92 Gälve (SE)	(72) Inventors: GUSTAFSSON, Bernt S-804 33 Gävle (SE) POUSETTE, Kurt S-802 70 Gävle (SE) (74) Representative: Johansson, Lars E.  Lars Johansson Patentbyra ABP.O. Box 68 801 02 Gävle 801 02 Gävle (SE)