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US 2025/0083969 A1Published application
Process to produce battery grade lithium hydroxide monohydrate with low content of carbonate
OwnerClaudia Pudack, Marcus de Castro Carvalho Simoes +2inventors
InventorsClaudia Pudack, Marcus de Castro Carvalho Simoes, Munier Hijazi, Thomas Josef Schaffrath
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Abstract
A process to produce battery grade lithium hydroxide monohydrate with low content of carbonate from an impure lithium feed by forming a concentrated lithium hydroxide solution that is saturated or nearly saturated with lithium hydroxide monohydrate, removing at least some lithium carbonate from the solution, crystallizing the lithium hydroxide monohydrate, and separating the crystallized lithium hydroxide monohydrate from the solution.
Claims18
A process for producing lithium hydroxide monohydrate comprising:
- forming a concentrated lithium hydroxide solution saturated or nearly saturated with lithium hydroxide monohydrate;
- removing at least some lithium carbonate from the concentrated lithium hydroxide solution via a first solid-liquid separation process;
- crystallizing the lithium hydroxide monohydrate in the concentrated lithium hydroxide solution;
- and
- separating the crystallized lithium hydroxide monohydrate from the concentrated lithium hydroxide solution via a second solid-liquid separation process.
2 more elements
Dependencies are inferred from the claim text.