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Method for extracting rare earth elements based on magnetic janus particles

A rare earth element and extraction technology, applied in the field of extraction, can solve problems such as magnetic Janus particles that have not been paid attention to, and achieve the effect of small footprint, strong flexibility, and improved extraction efficiency

Active Publication Date: 2021-07-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Patent Document 1 does not pay attention to the application of the magnetic Janus particles in the field of extraction, especially the field of extraction of rare earth elements

Method used

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  • Method for extracting rare earth elements based on magnetic janus particles
  • Method for extracting rare earth elements based on magnetic janus particles

Examples

Experimental program
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Effect test

Embodiment 1

[0106] In 50 ml of an aqueous solution of a neodymium compound with a concentration of 100 ppm in terms of neodymium, add 1 ml of a kerosene solution of 1 mol / L monoisooctyl phosphate (P507) and 0.1 g (relative to the aqueous solution of the neodymium compound and P507 The total amount of kerosene solution, 0.2wt.%) magnetic Janus particles (such as figure 1 Magnetic silica / polystyrene-divinylbenzene Janus particles shown in ), placed in a shaker at a constant temperature of 25°C and a rotational speed of 130r / min for 15min. After shaking, use a 0.3T magnet to enrich and remove the enriched emulsion part stabilized by Janus particles in the system, and the system obtained after separating the enriched emulsion part is left to stand for 15 minutes to separate layers and then separate liquids. The residual amount of the neodymium compound in the aqueous phase after enhanced extraction with the magnetic Janus material was 25 ppm in terms of neodymium, and the extraction rate of ...

Embodiment 2

[0109] In 15ml of an aqueous solution of a neodymium compound with a concentration of 100ppm in terms of neodymium, add 15ml of a concentration of 0.00414mol / L isooctyl monoisooctyl phosphate (P507) in kerosene and 0.03g (relative to the aqueous solution of the neodymium compound and The total amount of kerosene solution of P507, 0.1% by weight) magnetic Janus particles (such as figure 1 The magnetic silica / polystyrene-divinylbenzene Janus particles shown in ) were placed in a shaker at a constant temperature of 25°C and a rotational speed of 130r / min for 20min. After the shaking, use a 0.3T magnet to enrich and remove the enriched emulsion part stabilized by the magnetic Janus particles in the system, and the system obtained after separating the enriched emulsion part is left to stand for 15 minutes to separate the layers, and then separate the liquid. The residual amount of the neodymium compound in the aqueous phase after enhanced extraction with the magnetic Janus materia...

Embodiment 3

[0112] In 15ml of an aqueous solution of a neodymium compound with a neodymium conversion concentration of 100ppm, add 15ml of a concentration of 0.00414mol / L isooctyl monoisooctyl phosphate (P507) in kerosene and 0.12g (relative to the aqueous solution of the neodymium compound and The total amount of kerosene solution of P507, 0.4% by weight) magnetic Janus particles (such as figure 1 Magnetic silica / polystyrene-divinylbenzene Janus particles shown in ), placed in a shaker at a constant temperature of 25°C and a rotational speed of 130r / min for 15min. After the shaking, use a 0.3T magnet to enrich and remove the enriched emulsion part stabilized by the magnetic Janus particles in the system, and the system obtained after separating the enriched emulsion part is left to stand for 15 minutes to separate the layers, and then separate the liquid. The residual amount of the neodymium compound in the aqueous phase after enhanced extraction with the magnetic Janus material was 5 p...

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Abstract

The present invention relates to a method for extracting rare earth elements based on magnetic Janus particles. The method for extracting rare earth elements of the present invention includes the following steps: a) in an aqueous solution containing rare earth elements to be extracted, mixing the composition for extraction and magnetic Janus particles to form an emulsion under dynamic conditions, wherein at least the composition for extraction is at least A part is formed as a dispersed phase stabilized by the magnetic Janus particles, wherein each of the magnetic Janus particles has both a hydrophilic part and a hydrophobic part; b) an external magnetic field A is applied to form a rich phase enriched with the dispersed phase collecting the emulsion part, and then separating the enriched emulsion part; c) layering the extraction system obtained after separating the enriched emulsion part, and then separating.

Description

technical field [0001] The invention relates to an extraction method, in particular to a method for enhancing the extraction of rare earth elements by using magnetic Janus particles as solid particle emulsifiers. Background technique [0002] Rare earth elements include lanthanides (lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu) in Group IIIB of the periodic table of chemical elements. ), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er)), thulium (Tm), ytterbium (Yb), lutetium (Lu)) and scandium (Sc) and yttrium (Y). my country is very rich in rare earth resources, not only has a large reserve, ranking first in the world, but also has a complete range of light, medium and heavy rare earths. Rare earth elements have been widely used in electronics, petrochemical, metallurgy, machinery, energy, light industry and environmental protection and other fields. The application of rare earth ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B3/26
CPCC22B59/00C22B3/26Y02P10/20
Inventor 徐建鸿杨振忠梁福鑫
Owner TSINGHUA UNIV
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