Method of preparing hollow metal or metal oxide nano- or microspheres
US-2016311132-A1 · Oct 27, 2016 · US
Method for preparing magnetite nanoparticles from low-grade iron ore using solvent extraction and magnetite nanoparticles prepared by the same
US8940179B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940179-B2 |
| Application number | US-201213679288-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 16, 2012 |
| Priority date | Nov 5, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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The present invention relates to a method for preparing magnetite nanoparticles from low-grade iron ore using solvent extraction and magnetite nanoparticles prepared by the same. According to the method for magnetite nanoparticles from low-grade iron ore of the present invention, it is possible to prepare high-purity magnetite nanoparticles having a purity of 99% or higher by solvent extraction using low-grade iron ore as a starting material, and thus it is possible to reduce the processing cost and the amount of energy used, thus supplying a high-efficiency magnetite nanoparticle adsorbent, which can be industrially applied to wastewater treatment or desalination plant, in large quantities at low cost. In particular, it is possible to effectively treat livestock wastewater, heavy metal wastewater, oil discharged into rivers, etc. at low cost, thus significantly contributing to the prevention of environmental pollution. Moreover, the magnetite nanoparticles prepared by the present invention has a purity of 99.5% and thus can be used as raw materials for high-tech products such as nanoparticle catalysts, magnetic fluids, MRI contrast agents, etc.
First claim
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What is claimed is: 1. A method for preparing magnetite nanoparticles from low-grade iron ore, comprising: (1) adding iron ore powder to an acidic solution and stirring the mixture to obtain iron ore leachate; (2) centrifuging the iron ore leachate and separating and discharging residual powder to obtain a supernatant; (3) adding an oxidant to the supernatant to oxidize all Fe 2+ ions to Fe 3+ ions, adding a solvent extractant thereto to form an iron-solvent extractant compl…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
- C01G49/08Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US8940179B2 cover?
- The present invention relates to a method for preparing magnetite nanoparticles from low-grade iron ore using solvent extraction and magnetite nanoparticles prepared by the same. According to the method for magnetite nanoparticles from low-grade iron ore of the present invention, it is possible to prepare high-purity magnetite nanoparticles having a purity of 99% or higher by solvent extraction…
- Who is the assignee on this patent?
- Korea Inst Geoscience & Minera
- What technology area does this patent fall under?
- Primary CPC classification C01G49/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 27 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).