(19)

(11)

EP 0 942 777 A1

(12)

(43) Date of publication: 22.09.1999 Bulletin 1999/38 (21) Application number: 97939437.0 (22) Date of filing: 18.08.1997

(51) International Patent Classification (IPC):  B01D 53/ 86( . ) B01J 15/ 00( . ) B01D 53/ 88( . ) B01J 35/ 04( . ) (86) International application number: PCT/US1997/014495 (87) International publication number: WO 1998/006479 (19.02.1998 Gazette 1998/07)

(84) Designated Contracting States: DE FR GB (30) Priority: 16.08.1996 US 19960699099 (71) Applicant: AlliedSignal Inc. Morristown, New Jersey 07962-2245 (US)

(72) Inventors: WALENGA, Joel T. Arlington Heights, IL 60004 (US) HOMEYER, Stephen T. Arlington Heights, IL 60005 (US) LEHANE, Colleen A. Rolling Meadows, IL 60008 (US) TOM, Robert Redondo Beach, CA 90278 (US) WESTELAKEN, William Manhattan Beach, CA 90266 (US) POLLITT, Stan C. Rancho Palos Verdes, CA 90275 (US) MIKOLAJCZYK, Sara J. Wheaton, IL 60187 (US) SNYDER, James R. Chicago, IL 60652 (US) LESTER, George, R. Salem, VA 24153 (US) (74) Representative: Hucker, Charlotte Jane  Gill Jennings & Every Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)