(19)

(11)

EP 0 977 623 A1

(12)

(43) Date of publication: 09.02.2000 Bulletin 2000/06 (21) Application number: 98919696.9 (22) Date of filing: 22.04.1998

(51) International Patent Classification (IPC)7: B01D 53/32, B01D 53/72 (86) International application number: PCT/SE9800/728 (87) International publication number: WO 9847/603 (29.10.1998 Gazette 1998/43)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 22.04.1997 SE 9701519 (71) Applicant: Ekonomivärme I Skaraborg AB 532 24 Skara (SE)	(72) Inventor: SÄWSTRÖM, Yngve S-532 31 Skara (SE) (74) Representative: Mossmark, Anders et al Albihns Patentbyra Göteborg ABP.O.Box 142 401 22 Göteborg 401 22 Göteborg (SE)