公开(公告)号：US11873539B2

公开(公告)日：2024-01-16

申请号：US17977459

申请日：2022-10-31

Applicant: HATCH LTD.

Inventor： Robert John Fraser ,  Jacqueline Fossenier ,  Maryam Neisani ,  Louiza Kahina Harkouk ,  Amir Mohammad Nazari ,  Fangyu Liu

IPC: C22B23/06 ,  C22B3/00

CPC classification number: C22B23/06 ,  C22B23/043 ,  C22B23/0461

Abstract: Processes and methods for refining ferronickel alloy, and producing nickel sulfate or other nickel product, are provided, where the ferronickel alloy is treated with an oxidizing leach. The oxidizing leach may be, for example, a pressure oxidation (POX) leach or a leach with peroxide or copper (II) ions. The treatment may be in the presence of added copper, such as by providing a copper sulfate solution. Producing nickel sulfate may comprise removing copper and iron after the leach, removing impurities, and either crystallizing the nickel sulfate or precipitating/winning another nickel product.

公开(公告)号：US12281027B2

公开(公告)日：2025-04-22

申请号：US17979410

申请日：2022-11-02

Applicant: HATCH LTD.

Inventor： Robert John Fraser ,  Andrea Winyen Trac ,  Louiza Kahina Harkouk

IPC: C01G53/10 ,  C01B17/96 ,  C01G1/10 ,  C01G3/10 ,  C01G45/10 ,  C01G51/10 ,  C22B23/00 ,  C22B47/00

Abstract: A process and method for producing a crystallized metal sulfate. The crystallized metal sulfate may be battery-grade. The method may comprise receiving a metal ion-containing stream and crystalizing a metal sulfate from the stream. The process may comprise receiving a stream from a metal processing plant, and crystalizing a metal sulfate from the stream. The process may be a metal electrowinning process comprising crystalizing a metal ion-containing stream to form a crystallized metal sulfate in a mother liquor. The process or method may comprise returning the mother liquor upstream or to the metal electrowinning process.

公开(公告)号：US20230048939A1

公开(公告)日：2023-02-16

申请号：US17979410

申请日：2022-11-02

Applicant: HATCH LTD.

Inventor： Robert John Fraser ,  Matthew Wesley Jones ,  Andrea Winyen Trac ,  Louiza Kahina Harkouk

IPC: C01G53/10

Abstract: A process and method for producing a crystallized metal sulfate. The crystallized metal sulfate may be battery-grade. The method may comprise receiving a metal ion-containing stream and crystalizing a metal sulfate from the stream. The process may comprise receiving a stream from a metal processing plant, and crystalizing a metal sulfate from the stream. The process may be a metal electrowinning process comprising crystalizing a metal ion-containing stream to form a crystallized metal sulfate in a mother liquor. The process or method may comprise returning the mother liquor upstream or to the metal electrowinning process.