(19)

(11)

EP 1 687 075 A1

(12)

(43) Date of publication: 09.08.2006 Bulletin 2006/32 (21) Application number: 04768594.6 (22) Date of filing: 23.09.2004

(51) International Patent Classification (IPC):  B01D 17/032(2006.01) B01D 21/24(2006.01) (86) International application number: PCT/GB2004/004050 (87) International publication number: WO 2005/039730 (06.05.2005 Gazette 2005/18)

(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 (30) Priority: 30.09.2003 GB 0322826 (71) Applicant: Houlison, David York YO30 6DT (GB)	(72) Inventor: Houlison, David York YO30 6DT (GB) (74) Representative: Boakes, Jason Carrington  Harrison Goddard Foote 31 St Saviourgate York YO1 8NQ York YO1 8NQ (GB)