(19)
(11) EP 3 972 936 A1

(12)

(43) Date of publication:
30.03.2022 Bulletin 2022/13

(21) Application number: 20809363.3

(22) Date of filing: 19.05.2020
(51) International Patent Classification (IPC): 
C01D 5/16(2006.01)
(52) Cooperative Patent Classification (CPC):
C01D 5/16; C01P 2006/80
(86) International application number:
PCT/CN2020/090982
(87) International publication number:
WO 2020/233558 (26.11.2020 Gazette 2020/48)
(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: 22.05.2019 CN 201920741030 U

(71) Applicant: SOLVAY SA
1120 Bruxelles (BE)

(72) Inventors:
  • WOOD, Michael
    Shanghai 200032 (CN)
  • WANG, Yan
    Shanghai 200032 (CN)
  • BEDEL, Sabrina
    54110 Dombasle Sur Meurthe (FR)
  • CRIADO, Claude
    54000 Nancy (FR)
  • WANG, Aiping
    Shanghai 201109 (CN)

(74) Representative: Vande Gucht, Anne 
Solvay S.A. Département de la Propriété Industrielle Rue de Ransbeek, 310
1120 Bruxelles
1120 Bruxelles (BE)

   


(54) PROCESS FOR PURIFYING A SODIUM SULFATE RESIDUE