(19)

(11)

EP 0 156 840 A1

(12)

(43) Date of publication: 09.10.1985 Bulletin 1985/41 (21) Application number: 84903426.0 (22) Date of filing: 12.09.1984

(51) International Patent Classification (IPC):  B01D 67/ 00( . ) B01D 69/ 14( . ) (86) International application number: PCT/AU1984/000179 (87) International publication number: WO 1985/001222 (28.03.1985 Gazette 1985/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 12.09.1983 AU 19830001368 10.10.1983 AU 19830001759 (71) Applicant: MEMTEC LIMITED Parramatta, NSW 2150 (AU)	(72) Inventor: FORD, Douglas, Lyons Eastwood, NSW 2122 (AU) (74) Representative: Eyles, Christopher Thomas  BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road London, EC1R 0DS London, EC1R 0DS (GB)