(19)

(11)

EP 3 684 891 A1

(12)

(43) Date of publication: 29.07.2020 Bulletin 2020/31 (21) Application number: 18856557.6 (22) Date of filing: 03.09.2018

(51) International Patent Classification (IPC):  C10L 5/14(2006.01) D21C 3/00(2006.01) C10L 5/44(2006.01) (86) International application number: PCT/SE2018/050883 (87) International publication number: WO 2019/054913 (21.03.2019 Gazette 2019/12)

(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: KH MA MD TN (30) Priority: 18.09.2017 SE 1751145 (71) Applicant: Valmet AB 851 94 Sundsvall (SE)	(72) Inventor: BJÖRKLUND, Peter 907 37 Umeå (SE)