(19)

(11)

EP 0 144 416 A1

(12)

(43) Date of publication: 19.06.1985 Bulletin 1985/25 (21) Application number: 84902471.0 (22) Date of filing: 07.06.1984

(51) International Patent Classification (IPC):  B01D 15/ 00( . ) B01D 53/ 02( . ) B01D 17/ 02( . ) C02F 1/ 28( . ) (86) International application number: PCT/SE1984/000216 (87) International publication number: WO 1984/004913 (20.12.1984 Gazette 1984/30)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 09.06.1983 SE 19830003268 03.05.1984 SE 19840002393 (71) Applicant: ZEOL AB S-220 07 Lund (SE)	(72) Inventors: ANDERSSON, Sten S-223 62 Lund (SE) FÄLTH, Lars S-275 00 Sjöbo (SE) VAREMAN, Kaj S-223 60 Lund (SE) (74) Representative: Wiklund, Ingrid Helena, et al  AWAPATENT AB, Box 5117 S-200 71 Malmö S-200 71 Malmö (SE)