(19)

(11)

EP 2 516 042 A1

(12)

(43) Date of publication: 31.10.2012 Bulletin 2012/44 (21) Application number: 10803472.9 (22) Date of filing: 16.12.2010

(51) International Patent Classification (IPC):  B01D 53/62(2006.01) C01F 5/24(2006.01) B01D 53/73(2006.01) (86) International application number: PCT/GB2010/052118 (87) International publication number: WO 2011/077117 (30.06.2011 Gazette 2011/26)

(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: 22.12.2009 GB 0922386 (71) Applicant: The University of Nottingham Nottingham Nottinghamshire NG7 2RD (GB)	(72) Inventors: WANG, Xialong Nottingham Nottinghamshire NG7 2RD (GB) MAROTO-VALER, Mercedes Nottingham Nottinghamshire NG7 2RD (GB) (74) Representative: Lawrence, John  Barker Brettell LLP 100 Hagley Road Edgbaston Birmingham B16 8QQ Edgbaston Birmingham B16 8QQ (GB)