(19)

(11)

EP 0 243 441 A1

(12)

(43) Date of publication: 04.11.1987 Bulletin 1987/45 (21) Application number: 86906501.0 (22) Date of filing: 31.10.1986

(51) International Patent Classification (IPC):  B01D 33/ 00( . ) B01D 33/ 04( . ) (86) International application number: PCT/SE1986/000500 (87) International publication number: WO 1987/002595 (07.05.1987 Gazette 1987/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.10.1985 SE 19850005141 (71) Applicant: ERIKSSON, Hans S-688 00 Storfors (SE)	(72) Inventor: ERIKSSON, Hans S-688 00 Storfors (SE)