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Preparation method of sandwich-structure magnetic mesoporous imprinted material capable of separating lanthanum, cerium, praseodymium or neodymium

An imprinted material and separation technology, which is applied in chemical instruments and methods, process efficiency improvement, alkali metal oxide/hydroxide, etc., can solve the problem of unsatisfactory separation effect and yield, high labor intensity and long process flow and other problems, to achieve the effect of novel material structure design, high adsorption rate and high adsorption capacity

Inactive Publication Date: 2017-06-13
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The efficient extraction and separation of low-concentration lanthanum, cerium, praseodymium or neodymium in the solution generally adopts extraction method, but the existing technology has high cost, pollutes the environment, long process flow, high labor intensity, poor continuity, inconvenient operation, separation effect and yield. rate is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Nano Fe 3 o 4 Cluster preparation: by FeCl 3 . 6H 2 O: sodium acetate: polyethylene glycol mass ratio is 2.2:6.5:1.5, take FeCl 3 . 6H 2 O, sodium acetate and polyethylene glycol, count the mass volume ratio g / mL of the above three and ethylene glycol as 10.2:5 again, FeCl 3 . 6H 2O. Sodium acetate and polyethylene glycol are added to ethylene glycol, magnetically stirred to dissolve them, and the obtained homogeneous yellow mixed solution is transferred to a polytetrafluorohydrothermal reaction kettle and sealed, heated to 160°C for 72 hours, and left for natural Cool to room temperature to obtain black particles, wash 6 times with ethanol, and then freeze-dry or vacuum-dry to obtain nano-Fe 3 o 4 Cluster;

[0027] (2) Core-shell structure Fe 3 o 4 @nSiO 2 Preparation of carrier: the nano-Fe obtained in step (1) 3 o 4 The clusters were ultrasonically treated with 0.1 mol / L hydrochloric acid solution for 5 min, washed alternately with ethanol and dei...

Embodiment 2

[0034] (1) Nano Fe 3 o 4 Cluster preparation: by FeCl 3 . 6H 2 O: sodium acetate: polyethylene glycol mass ratio is 2.7:7.2:2, take FeCl 3 . 6H 2 O, sodium acetate and Polyethylene Glycol, count 11.9:100 according to the mass volume ratio g / mL of above-mentioned three and ethylene glycol again, FeCl 3 . 6H 2 O. Add sodium acetate and polyethylene glycol to ethylene glycol, stir magnetically to dissolve them, transfer the obtained homogeneous yellow mixed solution to a polytetrafluorohydrothermal reaction kettle and seal it, heat it to 200°C for 36 hours, and wait for natural Cool to room temperature to obtain black particles, wash 5 times with ethanol, and then freeze-dry or vacuum-dry to obtain nano-Fe 3 o 4 Cluster;

[0035] (2) Core-shell structure Fe 3 o 4 @nSiO 2 Preparation of carrier: the nano-Fe obtained in step (1) 3 o 4 Clusters were ultrasonically treated with 0.1 mol / L hydrochloric acid solution for 10 min, washed alternately with ethanol and deioni...

Embodiment 3

[0042] (1) Nano Fe 3 o 4 Cluster preparation: by FeCl 3 . 6H 2 The mass ratio of O: sodium acetate: polyethylene glycol is 3.2: 7.8: 2.5, FeCl 3 . 6H 2 O, sodium acetate and polyethylene glycol, count 13.5:500 according to the mass volume ratio g / mL of above-mentioned three and ethylene glycol again, FeCl 3 . 6H 2 O. Sodium acetate and polyethylene glycol are added to ethylene glycol, and magnetically stirred to dissolve them. Transfer the obtained homogeneous yellow mixed solution to a polytetrafluorohydrothermal reaction kettle and seal it, and heat it to 250°C for 1 hour. Cool to room temperature to obtain black particles, wash several times with ethanol, and then freeze-dry or vacuum-dry to obtain nano-Fe 3 o 4 Cluster;

[0043] (2) Core-shell structure Fe 3 o 4 @nSiO 2 Preparation of carrier: the nano-Fe obtained in step (1) 3 o 4 The clusters were ultrasonically treated with 0.1 mol / L hydrochloric acid solution for 20 min, washed alternately with ethanol ...

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PUM

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Abstract

The invention relates to a preparation method of a sandwich-structure magnetic mesoporous imprinted material capable of separating lanthanum, cerium, praseodymium or neodymium. A superparamagnetic Fe3O4 nanocluster is synthesized by a hydrothermal method; and in combination with a cetyltrimethylammonium bromide template method and by adopting lanthanum, cerium, praseodymium or neodymium ions as template ions and siloxane with a functional group as a functional monomer, a molecularly imprinted mesoporous material with high selectivity on the lanthanum, cerium, praseodymium or neodymium ions is synthesized by a silicate ester sol-gel method. The invention has the following advantages: the sandwich-structure magnetic mesoporous imprinted material capable of separating lanthanum, cerium, praseodymium or neodymium has specific identification ability on lanthanum, cerium, praseodymium or neodymium, has high magnetic responsibility, high adsorption capacity, high adsorption rate and strong acid-base resistance, and can realize efficient enrichment and separation of lanthanum, cerium, praseodymium or neodymium while the liquid-solid separation process is simplified.

Description

technical field [0001] The invention relates to a preparation method of a sandwich structure magnetic mesoporous imprinted material capable of separating lanthanum, cerium, praseodymium or neodymium, and belongs to the technical field of material preparation. Background technique [0002] The efficient extraction and separation of low-concentration lanthanum, cerium, praseodymium or neodymium in the solution generally adopts extraction method, but the existing technology has high cost, pollutes the environment, long process flow, high labor intensity, poor continuity, inconvenient operation, separation effect and yield. The rate is also not ideal. In the production process, it is necessary to completely separate the metal components and make them easy to recycle, and the higher the yield, the better. This just needs to improve or change original correlation method. Adsorption technology has the advantages of low energy consumption, simple operation, and good selectivity, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30C22B3/22C22B59/00
CPCB01J20/103B01J20/28009B01J20/28083B01J20/3057C22B3/22C22B59/00Y02P10/20
Inventor 王万坤苏向东王福春
Owner GUIZHOU INST OF TECH
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