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(11)

EP 3 204 333 A1

(12)

(43) Date of publication: 16.08.2017 Bulletin 2017/33 (21) Application number: 15781049.0 (22) Date of filing: 02.10.2015

(51) International Patent Classification (IPC):  C01C 1/02(2006.01) C01C 1/04(2006.01) C25B 1/26(2006.01) B01D 61/44(2006.01) C01D 7/18(2006.01) C01B 7/05(2006.01) (86) International application number: PCT/EP2015/072790 (87) International publication number: WO 2016/055367 (14.04.2016 Gazette 2016/15)

(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 Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 09.10.2014 EP 14188350 (71) Applicant: Solvay SA 1120 Bruxelles (BE)	(72) Inventors: ASENSIO, Salvador E-39300 Torrelavega (ES) DIAZ, Antonio E-39679 Cantabria (ES) ALONSO, Rebeca E-39009 Santander (ES) HURTADO, Ines B-1040 Brussels (BE) VANDERVORST, Eric B-7850 Enghein (BE) (74) Representative: Teipel, Stephan et al Lederer & Keller Patentanwälte Partnerschaft mbB Unsöldstrasse 2 80538 München 80538 München (DE)