Processes for Producing Acetic Acid
US-2015376105-A1 · Dec 31, 2015 · US
Solvent extraction method
US2021039011A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021039011-A1 |
| Application number | US-201816979607-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 21, 2018 |
| Priority date | Mar 12, 2018 |
| Publication date | Feb 11, 2021 |
| Grant date | — |
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- Title
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Abstract
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Provided is a solvent extraction method that allows selectively separating magnesium from an acidic aqueous solution of sulfuric acid. The solvent extraction method includes: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by diluting an extractant made of alkylphosphonic acid ester with a diluent. A concentration of the extractant is set to 40 volume % or more and 60 volume % or less and a pH of the acidic aqueous solution of sulfuric acid is set to 1.5 or more and 2.0 or less, or the concentration of the extractant is set to 20 volume % or more and 50 volume % or less and the pH of the acidic aqueous solution of sulfuric acid is set to 2.0 or more and 2.5 or less.
First claim
Opening claim text (preview).
1 A solvent extraction method comprising: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by diluting an extractant made of bis(2-ethylhexyl) hydrogen phosphate with a diluent, wherein a concentration of the extractant in the organic solvent is set to 40 volume % or more and 60 volume % or less and a pH of the acidic aqueous solution of sulfuric acid is set to 1.5 or more and 2.0 or less. 2 The solvent extraction method according to claim 1 , wherein the concentration of the extractant in the organic solvent is set to 40 volume % or more and 50 volume % or less. 3 (canceled) 4 (canceled)
Assignees
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Classifications
Recycling · CPC title
Phosphoric acid, e.g. (O)P(OH)3 · CPC title
Obtaining magnesium · CPC title
Flow sheets · CPC title
- B01D11/0492Primary
Applications, solvents used · CPC title
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- What does patent US2021039011A1 cover?
- Provided is a solvent extraction method that allows selectively separating magnesium from an acidic aqueous solution of sulfuric acid. The solvent extraction method includes: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by …
- Who is the assignee on this patent?
- Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification B01D11/0492. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Feb 11 2021 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).