Method for producing lithium hydroxide
AssigneeJx Metals Circular Solutions Co., Ltd.
InventorsHirotaka Ariyoshi, Isao Tomita, Hiroshi Abe
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Abstract
Provided is a method for producing lithium hydroxide, which can obtain lithium hydroxide from lithium sulfate with a relatively low cost. A method for producing lithium hydroxide from lithium sulfate includes: a hydroxylation step of allowing the lithium sulfate to react with barium hydroxide in a liquid to provide a lithium hydroxide solution; a barium removal step of removing barium ions in the lithium hydroxide solution using a cation exchange resin and/or a chelate resin; and a crystallization step of precipitating lithium hydroxide in the lithium hydroxide solution that has undergone the barium removal step.
Claims16
A method for producing lithium hydroxide from lithium sulfate, the method comprising:
- a hydroxylation step of allowing the lithium sulfate to react with barium hydroxide in a liquid to provide a lithium hydroxide solution;
- a barium removal step of removing barium ions in the lithium hydroxide solution using a cation exchange resin and/or a chelate resin;
- and a crystallization step of precipitating lithium hydroxide in the lithium hydroxide solution that has undergone the barium removal step.
A method for producing lithium hydroxide from lithium carbonate, the method comprising:
- a hydroxylation step of allowing the lithium carbonate to react with calcium hydroxide in a liquid to provide a lithium hydroxide solution;
- a calcium removal step of removing calcium ions in the lithium hydroxide solution using a cation exchange resin and/or a chelate resin;
- and a crystallization step of precipitating lithium hydroxide in the lithium hydroxide solution that has undergone the calcium removal step.
Dependencies are inferred from the claim text.