Process and its products for spent lithium-ion batteries treatment
US-12592423-B2 · Mar 31, 2026 · US
Method for producing high-purity nickel surface
US9017640B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9017640-B2 |
| Application number | US-201214359312-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2012 |
| Priority date | Nov 22, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing high purity nickel sulfate, comprising performing a sulfurization step by adding a sulfurizing agent to an acidic solution containing nickel, and obtaining a precipitate of nickel sulfide and a solution; performing a redissolution step by preparing a slurry of the nickel sulfide and adding an oxidizing agent to the slurry, to obtain a concentrated solution of nickel; performing a solution purification step by subjecting the c…
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Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C22B23/0469Primary
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9017640B2 cover?
- Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.
- Who is the assignee on this patent?
- Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification C22B23/0469. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 28 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).