(19)

(11)

EP 0 529 011 A1

(12)

(43) Date of publication: 03.03.1993 Bulletin 1993/09 (21) Application number: 91920982.0 (22) Date of filing: 18.05.1990

(51) International Patent Classification (IPC):  B01D 1/ 00( . ) B01D 3/ 06( . ) C10M 175/ 00( . ) B01D 1/ 30( . ) B01D 5/ 00( . ) (86) International application number: PCT/US1990/002004 (87) International publication number: WO 1991/017804 (28.11.1991 Gazette 1991/27)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (71) Applicants: ENPROTEC, INC. N.V. Amersham, Buckinghamshire HP7 0RU (GB) MITCHARD, Leonard, C. Bethesda, MD 20816 (US) KENTON, Kalevi, J. London N6 4NJ (GB)	(72) Inventor: KENTON, Kalevi, J., 6 High Sheldon London N6 4NJ (GB) (74) Representative: Pidgeon, Robert John  Appleyard Lees & Co. 15 Clare Road Halifax West Yorkshire HX1 2HY Halifax West Yorkshire HX1 2HY (GB)