Processes for crystallizing metal sulfates and methods for producing crystallized metal sulfates
OwnerRobert John Fraser, Andrea Winyen Trac +1inventors
InventorsRobert John Fraser, Andrea Winyen Trac, Louiza Kahina Harkouk
Life of this patent
Estimating the term…
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.
Claims33
A process for crystallizing a metal sulfate, the process comprising:
- diverting at least a portion of a fluid stream from a process performed in a metal processing plant to a crystallizer separate from the process performed in the metal processing plant,
- the stream comprising a metal sulfate and an impurity;
- controlling operational parameters of the crystallizer to crystalize the metal sulfate over the impurity, and
- crystallizing the metal sulfate to form a crystallized metal sulfate in a mother liquor, the mother liquor comprising the impurity;
- separating the crystallized metal sulfate from the mother liquor;
- and
- returning the mother liquor upstream in the process or returning the mother liquor to the metal processing plant;
- wherein the fluid stream is a feed to a metal electrowinning, metal hydrogen reduction, metal intermediate production, or metal oxide production step of the plant.
A process for crystallizing a metal sulfate, the process comprising:
- diverting at least a portion of a fluid stream from a process performed in a metal processing plant to a crystallizer separate from the process performed in the metal processing plant,
- the stream comprising a metal sulfate and an impurity;
- controlling operational parameters of the crystallizer to crystalize the metal sulfate over the impurity, and
- crystallizing the metal sulfate to form a crystallized metal sulfate in a mother liquor, the mother liquor comprising the impurity;
- separating the crystallized metal sulfate from the mother liquor;
- and
- returning the mother liquor upstream in the process or returning the mother liquor to the metal processing plant;
- wherein the fluid stream is an anolyte from a metal electrowinning step of the plant.
Dependencies are inferred from the claim text.