(19)
(11) EP 3 580 388 A1

(12)

(43) Date of publication:
18.12.2019 Bulletin 2019/51

(21) Application number: 18750677.9

(22) Date of filing: 31.01.2018
(51) International Patent Classification (IPC): 
D21C 1/02(2006.01)
D21C 1/04(2006.01)
 D21B 1/02(2006.01)
(86) International application number:
PCT/SE2018/050072
(87) International publication number:
WO 2018/147784 (16.08.2018 Gazette 2018/33)
(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 MD TN

(30) Priority: 07.02.2017 SE 1750106

(71) Applicant: VALMET AB
851 94 Sundsvall (SE)

(72) Inventors:
  • WILGOTSON, Fredrik
    20230 CHONBURI (TH)
  • ANTONSSON, Stefan
    SE-117 58 Stockholm (SE)
  • ERIKSSON, Lars
    SE-865 33 Alnö (SE)
  • WERNERSSON ÖSTBERG, Bengt
    SE-656 72 Skattkärr (SE)
  • OLSSON, Krister
    SE-652 28 Karlstad (SE)

(74) Representative: Becker Kurig Straus 
Patentanwälte Bavariastrasse 7
80336 München
80336 München (DE)

   


(54) SYSTEM AND METHOD FOR SILICA REMOVAL IN A PULPING PROCESS