(19)

(11)

EP 0 468 001 A1

(12)

(43) Date of publication: 29.01.1992 Bulletin 1992/05 (21) Application number: 91900892.0 (22) Date of filing: 19.12.1990

(51) International Patent Classification (IPC):  B01D 24/ 12( . ) (86) International application number: PCT/GB1990/001984 (87) International publication number: WO 1991/008817 (27.06.1991 Gazette 1991/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 19.12.1989 GB 19890028570 (71) Applicant: Seymour, Edward Andrew Alness, Ross-shire, Scotland (GB)	(72) Inventor: Seymour, Edward Andrew Alness, Ross-shire, Scotland (GB)