(19)
(11) EP 4 256 097 A1

(12)

(43) Date of publication:
11.10.2023 Bulletin 2023/41

(21) Application number: 21816087.7

(22) Date of filing: 30.11.2021
(51) International Patent Classification (IPC): 
C22B 11/08(2006.01)
(52) Cooperative Patent Classification (CPC):
C22B 11/08
(86) International application number:
PCT/EP2021/083470
(87) International publication number:
WO 2022/117530 (09.06.2022 Gazette 2022/23)
(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: 01.12.2020 US 202017108129
01.12.2020 EP 20210962

(71) Applicant: S.A. LHOIST RECHERCHE ET DEVELOPPEMENT
1342 Ottignies-Louvain-la-Neuve (BE)

(72) Inventors:
  • DU PLESSIS, Chris
    1342 Ottignies Louvain-la-Neuve (BE)
  • LAMBERT, Hugues
    1342 Ottignies-Louvain-la-Neuve (BE)
  • BALLARD, Deborah, A.
    Fort Worth, Texas 76135 (US)

(74) Representative: Calysta NV 
Lambroekstraat 5a
1831 Diegem
1831 Diegem (BE)

   


(54) PROCESS FOR GOLD AND/OR PLATINUM GROUP METALS HEAP LEACHING WITH LIME