Processing hard rock lithium minerals or other materials to produce lithium materials and byproducts converted from a sodium sulfate intermediate product
US-2024425381-A1 · Dec 26, 2024 · US
Method for preparing lithium hydroxide using lithium sulfate and barium hydroxide
US2023373802A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023373802-A1 |
| Application number | US-202018031052-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 23, 2020 |
| Priority date | Oct 12, 2020 |
| Publication date | Nov 23, 2023 |
| Grant date | — |
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- Title
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Abstract
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In a method for preparing lithium hydroxide, a first mixture of lithium sulfate (Li 2 SO 4 ) and barium hydroxide (Ba(OH) 2 ) is prepared, a second mixture that is converted into insoluble lithium sulfate (BaSO 4 ) and soluble lithium hydroxide (LiOH) is prepared by roasting the first mixture, the second mixture is dissolved to precipitate the insoluble barium sulfate (BaSO 4 ), the precipitated barium sulfate (BaSO 4 ) is separated by solid-liquid separation, and the solution from which the barium sulfate (BaSO 4 ) is separated is evaporated to obtain lithium hydroxide (LiOH).
First claim
Opening claim text (preview).
1 . A method for preparing lithium hydroxide, the method comprising: preparing a first mixture by mixing lithium sulfate (Li 2 SO 4 ) and barium hydroxide (Ba(OH) 2 ); preparing a second mixture that is converted into insoluble barium sulfate (BaSO 4 ) and water-soluble lithium hydroxide (LiOH) by roasting the first mixture; dissolving the second mixture to precipitate the insoluble barium sulfate (BaSO 4 ); separating the precipitated barium sulfate (BaSO 4 ) by solid-liquid separation to obtain a solution from which the barium sulfate (BaSO 4 ) is separated; and evaporating the solution to obtain lithium hydroxide (LiOH). 2 . The method of claim 1 , wherein the first mixture comprises the lithium sulfate (Li 2 SO 4 ) and the barium hydroxide (Ba(OH) 2 ) in a molar ratio of 1:1. 3 . The method of claim 2 , wherein preparing the second mixture that is converted into insoluble barium sulfate (BaSO4) and water-soluble lithium hydroxide (LiOH) by roasting the first mixture is performed in an electric furnace at 200° C. to 280° C. for 2 to 4 hours.
Assignees
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Classifications
- C01D15/02Primary
Oxides; Hydroxides · CPC title
Compositional purity · CPC title
by d-values or two theta-values, e.g. as X-ray diagram · CPC title
Process efficiency · CPC title
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- What does patent US2023373802A1 cover?
- In a method for preparing lithium hydroxide, a first mixture of lithium sulfate (Li 2 SO 4 ) and barium hydroxide (Ba(OH) 2 ) is prepared, a second mixture that is converted into insoluble lithium sulfate (BaSO 4 ) and soluble lithium hydroxide (LiOH) is prepared by roasting the first mixture, the second mixture is dissolved to precipitate the insoluble barium sulfate (BaSO 4 ), the precipitate…
- Who is the assignee on this patent?
- Univ Nat Chonnam Ind Found
- What technology area does this patent fall under?
- Primary CPC classification C01D15/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Nov 23 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).