(19)

(11)

EP 2 293 863 A1

(12)

(43) Date of publication: 16.03.2011 Bulletin 2011/11 (21) Application number: 08772343.3 (22) Date of filing: 02.07.2008

(51) International Patent Classification (IPC):  B01D 53/22(2006.01) (86) International application number: PCT/US2008/068981 (87) International publication number: WO 2010/002404 (07.01.2010 Gazette 2010/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: UOP LLC Des Plaines, Illinois 60017-5017 (US)	(72) Inventors: LIU, Chunqing Des Plaines, Illinois 60017-5017 (US) WILSON, Stephen T. Des Plaines, Illinois 60017-5017 (US) (74) Representative: Hayes, Adrian Chetwynd et al Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)