Valuable-metal extraction method
US-2015376734-A1 · Dec 31, 2015 · US
Processes for recovering metals from aqueous solutions
US8968698B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8968698-B2 |
| Application number | US-201213670737-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 7, 2012 |
| Priority date | Jul 7, 2009 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the molybdenum and/or other value metal from the organic phase solution by contacting it with an aqueous phase strip solution containing an inorganic compound and having a ≦1.0 M concentration of free ammonia, and recovering the molybdenum and/or other value metal by separating it from the aqueous phase strip solution. When the molybdenum and/or other value metal are present only in low concentration, the processes can include an organic phase recycle step and/or an aqueous phase strip recycle step in order to concentrate the metal prior to recover.
First claim
Opening claim text (preview).
What is claimed is: 1. A solvent extraction process for recovering a metal present at low concentration from an acidic aqueous solution, the process comprising: a) contacting in a mixer the acidic aqueous solution with an organic phase solution comprising a phosphinic acid compound represented by: wherein each of R 1 and R 2 is independently chosen from an optionally…
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- C22B3/26Primary
Chemistry & Metallurgy · mapped topic
- C22B3/1683Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8968698B2 cover?
- Provided herein are processes for recovering molybdenum and/or other value metals (e.g., uranium) present in aqueous solutions from a large range of concentrations: from ppm to grams per liter via a solvent extraction process by extracting the molybdenum and/or other value metal from the aqueous solution by contacting it with an organic phase solution containing a phosphinic acid, stripping the…
- Who is the assignee on this patent?
- Bednarski Troy Allan, Cocalia Violina Antoneta, Soderstrom Matthew Dean, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C22B3/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 03 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).