(19)

(11)

EP 2 286 024 A1

(12)

(43) Date of publication: 23.02.2011 Bulletin 2011/08 (21) Application number: 09753845.8 (22) Date of filing: 25.05.2009

(51) International Patent Classification (IPC):  D21C 9/16(2006.01) (86) International application number: PCT/EP2009/056278 (87) International publication number: WO 2009/144190 (03.12.2009 Gazette 2009/49)

(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 MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 26.05.2008 EP 08156934 (71) Applicant: SOLVAY (Société Anonyme) 1050 Bruxelles (BE)	(72) Inventor: DOURNEL, Pierre B-1030 Brussels (BE) (74) Representative: Vande Gucht, Anne et al Solvay S.A. Département de la Propriété Industrielle Rue de Ransbeek, 310 1120 Bruxelles 1120 Bruxelles (BE)