(19)

(11)

EP 0 713 411 A1

(12)

(43) Date of publication: 29.05.1996 Bulletin 1996/22 (21) Application number: 94923590.0 (22) Date of filing: 09.08.1994

(51) International Patent Classification (IPC):  B01D 1/ 06( . ) B01D 3/ 00( . ) B01D 1/ 26( . ) (86) International application number: PCT/AU1994/000457 (87) International publication number: WO 1995/005226 (23.02.1995 Gazette 1995/09)

(84) Designated Contracting States: BE DE DK FR GB IE NL (30) Priority: 12.08.1993 AU 1993PM00804 15.04.1994 AU 1994PM05115 (71) Applicant: Ancon Chemicals Pty. Ltd. Mordialloc, Victoria 3195 (AU)	(72) Inventor: WALKER, Michael Mordialloc, Victoria 3195 (AU) (74) Representative: Matthews, Heather Clare  Keith W Nash & Co Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)