(19)

(11)

EP 0 814 908 A1

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 96906835.0 (22) Date of filing: 11.03.1996

(51) International Patent Classification (IPC):  C02F 1/ 42( . ) B01D 24/ 02( . ) B01J 47/ 02( . ) B01D 24/ 00( . ) B01J 8/ 04( . ) B01J 49/ 02( . ) (86) International application number: PCT/GB1996/000583 (87) International publication number: WO 1996/028252 (19.09.1996 Gazette 1996/42)

(84) Designated Contracting States: BE DE DK FR GB IT NL (30) Priority: 14.03.1995 GB 19950005091 (71) Applicant: USF Limited Hertford SG13 7NW (GB)	(72) Inventors: STOLBERG, Errol Middlesex UB6 9NY (GB) FARRAR, John Buckinghamshire SL7 3EN (GB) (74) Representative: Rackham, Stephen Neil  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)