(19)

(11)

EP 1 599 267 A1

(12)

(43) Date of publication: 30.11.2005 Bulletin 2005/48 (21) Application number: 04716269.8 (22) Date of filing: 02.03.2004

(51) International Patent Classification (IPC)7: B01D 19/04, C11D 3/00, D21C 3/28 (86) International application number: PCT/GB2004/000871 (87) International publication number: WO 2004/078312 (16.09.2004 Gazette 2004/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 03.03.2003 GB 0304788 (71) Applicant: Cognis Performance Chemicals Ltd. Southampton SO45 3ZG (GB)	(72) Inventors: BECKETT, Gordon Alister Downton,Wiltshire SP5 3LZ (GB) DIXON, Elizabeth Fareham,Hants PO16 8RN (GB) (74) Representative: Gittinger, Andreas et al Cognis Deutschland GmbH & Co. KG Postfach 13 01 64 40551 Düsseldorf 40551 Düsseldorf (DE)