(19)

(11)

EP 2 720 767 A1

(12)

(43) Date of publication: 23.04.2014 Bulletin 2014/17 (21) Application number: 12730744.5 (22) Date of filing: 19.06.2012

(51) International Patent Classification (IPC):  B01D 5/00(2006.01) B01D 8/00(2006.01) B01D 7/00(2006.01) B01D 53/26(2006.01) (86) International application number: PCT/US2012/043051 (87) International publication number: WO 2012/177584 (27.12.2012 Gazette 2012/52)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 20.06.2011 US 201161498869 P (71) Applicant: Praxair Technology, Inc. Danbury, CT 06810 (US)	(72) Inventor: CHENG, Alan, T. Naperville, IL 60564 (US) (74) Representative: Schwan - Schwan - Schorer  Bauerstrasse 22 80796 München 80796 München (DE)