US 12,170,161 B2
Stock solution
Piotr Jakub Glazer, Delft (NL); Ronald Alphons Penners, Delft (NL); Simon Petrus Maria Berkhout, Delft (NL); and Peter Carlo Rem, Rijswijk (NL)
Assigned to URBAN MINING CORP B.V., Rotterdam (NL); and TECHNISCHE UNIVERSITEIT DELFT, Delft (NL)
Appl. No. 17/442,395
Filed by URBAN MINING CORP B.V., Rotterdam (NL); and DELFT UNIVERSITY OF TECHNOLOGY, Delft (NL)
PCT Filed Mar. 27, 2020, PCT No. PCT/NL2020/050215
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2020/197398, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2022821 (NL), filed on Mar. 27, 2019.
Prior Publication US 2022/0351886 A1, Nov. 3, 2022
Int. Cl. H01F 1/44 (2006.01); B22F 1/145 (2022.01)
CPC H01F 1/445 (2013.01) [B22F 1/145 (2022.01); B22F 2301/35 (2013.01); B22F 2304/10 (2013.01); B22F 2304/15 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of producing a stock solution, comprising:
contacting an acidic solution comprising an acid in a reaction container filled with an excess of a mineral bulk material comprising Fe(III) and optionally Fe(II), wherein the mineral bulk material is in excess with respect to the acid in the acidic solution whereby, theoretically, the acid can fully react with the bulk material;
wherein the acid reacts with the bulk material to form the stock solution comprising dissolved ferric (Fe(III)) and optionally ferrous (Fe(II)) ions; and
separating said stock solution from the mineral bulk material.