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(11)

EP 2 051 788 A1

(12)

(43) Date of publication: 29.04.2009 Bulletin 2009/18 (21) Application number: 07814141.3 (22) Date of filing: 16.08.2007

(51) International Patent Classification (IPC):  B01D 11/04(2006.01) C07C 31/125(2006.01) C07C 45/33(2006.01) C07C 45/80(2006.01) C07C 49/413(2006.01) C07B 63/00(2006.01) C07C 29/86(2006.01) C07C 35/08(2006.01) C07C 45/53(2006.01) C07C 49/403(2006.01) C07C 409/14(2006.01) (86) International application number: PCT/US2007/076061 (87) International publication number: WO 2008/022233 (21.02.2008 Gazette 2008/08)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 18.08.2006 US 838957 P 12.02.2007 US 901053 P (71) Applicant: Invista Technologies S.à.r.l. 9000 St. Gallen (CH)	(72) Inventors: WHISTON, Keith Darlington Durham DL3 8EY (GB) SEDDON, Kenneth Richard Donaghadee Co. Down BT21 0LA (GB) FORSYTH, Stewart Alexander Wingate County Durham TS28 5DY (GB) (74) Representative: Cockerton, Bruce Roger  Carpmaels & Ransford 43-45 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)