(19)

(11)

EP 0 589 905 A1

(12)

(43) Date of publication: 06.04.1994 Bulletin 1994/14 (21) Application number: 92909936.0 (22) Date of filing: 08.05.1992

(51) International Patent Classification (IPC):  B01D 53/ 22( . ) G05D 16/ 06( . ) F17C 13/ 04( . ) G05D 16/ 16( . ) (86) International application number: PCT/GB1992/000837 (87) International publication number: WO 1992/020956 (26.11.1992 Gazette 1992/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 11.05.1991 GB 19910010250 (71) Applicant: CALOR AIR SEPARATION LIMITED Slough SL3 9JG (GB)	(72) Inventor: PAGE, John, Kenneth, Rurik 16 Oaktree Way Surrey GU17 8QS (GB) (74) Representative: Gambell, Derek  Hyde, Heide & O'Donnell 10-12 Priests Bridge London SW15 5JE London SW15 5JE (GB)