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Preparation method and detachment method of detachable magnetic-microsphere-supported noble metal catalyst

A technology of noble metal catalysts and magnetic microspheres, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the difficulty, lack, and lack of separation of carriers and particles Connecting precious metal catalysts and other issues

Active Publication Date: 2016-11-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Through the above analysis, it is not difficult to find that, on the one hand, compounds containing mercapto or amino groups have a good connection and immobilization effect on noble metal nanoparticles, and can effectively control the type, shape, size dispersion and loading capacity of the loaded particles, but Compounds are directly chemically bonded to the surface of the magnetic carrier, which will lead to difficulties in the separation of the carrier and the particles; on the other hand, although the cheap cyclodextrin has been successfully modified on the surface of the magnetic carrier and has a reversible assembly mode with the guest molecule, it does not It has the function of connecting noble metal catalysts, and there is a lack of a bridge between the two to connect them skillfully

Method used

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  • Preparation method and detachment method of detachable magnetic-microsphere-supported noble metal catalyst
  • Preparation method and detachment method of detachable magnetic-microsphere-supported noble metal catalyst
  • Preparation method and detachment method of detachable magnetic-microsphere-supported noble metal catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1. Preparation of carbon-coated ferroferromagnetic microspheres (MFC):

[0050] Weigh 3.6 g of FeCl 3 ·6H 2 O, 0.72 g of trisodium citrate and 4.8 g of anhydrous sodium acetate in a 250 ml three-necked flask, then add 90 ml of ethylene glycol and 10 ml of absolute ethanol and stir evenly, then transfer to the reaction kettle at 200 °C React for 10 h. Then washed three times with deionized water and absolute ethanol, and dried in a vacuum oven at 60°C for later use.

[0051] Weigh the above-prepared Fe 3 o 4 0.1 g, add 30 ml of deionized water to ultrasonically disperse evenly, then add 2 g of glucose to dissolve, transfer to the reaction kettle at 200°C for 12 h. After the reaction, wash with deionized water and absolute ethanol three times respectively, and dry in a vacuum oven at 60°C for later use.

[0052] 2. Preparation of cyclodextrin-modified carbon-coated ferric oxide magnetic microspheres (MFC / β-CD):

[0053] Weigh 1 g of MFC in a three-neck flask, add 2...

Embodiment 2

[0059] 1. Preparation of carbon-coated ferroferromagnetic microspheres (MFC):

[0060] Weigh 3.6 g of FeCl 3 ·6H 2 O, 0.72 g of trisodium citrate and 4.8 g of anhydrous sodium acetate in a 250 ml three-necked flask, then add 90 ml of ethylene glycol and 10 ml of absolute ethanol and stir evenly, then transfer to the reaction kettle at 200 °C React for 10 h. Then washed three times with deionized water and absolute ethanol, and dried in a vacuum oven at 60°C for later use.

[0061] Weigh the above-prepared Fe 3 o 4 0.1 g, add 30 ml of deionized water to ultrasonically disperse evenly, then add 2 g of glucose to dissolve, transfer to the reaction kettle at 200°C for 12 h. After the reaction, wash with deionized water and absolute ethanol three times respectively, and dry in a vacuum oven at 60°C for later use.

[0062] 2. Preparation of cyclodextrin-modified carbon-coated ferric oxide magnetic microspheres (MFC / β-CD):

[0063] Weigh 0.5 g of MFC in a three-necked flask, a...

Embodiment 3

[0069] 1. Preparation of carbon-coated ferroferromagnetic microspheres (MFC):

[0070] Weigh 3.6 g of FeCl 3 ·6H 2 O, 0.72 g of trisodium citrate and 4.8 g of anhydrous sodium acetate in a 250 ml three-necked flask, then add 90 ml of ethylene glycol and 10 ml of absolute ethanol and stir evenly, then transfer to the reaction kettle at 200 °C React for 10 h. Then washed three times with deionized water and absolute ethanol, and dried in a vacuum oven at 60°C for later use.

[0071] Weigh the above-prepared Fe 3 o 4 0.1 g, add 30 ml of deionized water to ultrasonically disperse evenly, then add 2 g of glucose to dissolve, transfer to the reaction kettle at 200°C for 12 h. After the reaction, wash with deionized water and absolute ethanol three times respectively, and dry in a vacuum oven at 60°C for later use.

[0072] 2. Preparation of cyclodextrin-modified carbon-coated ferric oxide magnetic microspheres (MFC / β-CD):

[0073] Weigh 0.5 g of MFC in a three-necked flask, a...

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Abstract

A preparation method and a detachment method of a detachable magnetic-microsphere-supported noble metal catalyst belong to the technical field of the recovery of magnetic-microsphere-supported noble metal catalysts and noble metal catalysts. The preparation method comprises the following steps: carbon-coated ferroferric oxide magnetic microspheres are prepared with a solvothermal method; beta-cyclodextrin is chemically bonded to MFC through epoxy chloropropane under an alkaline condition, so as to form a magnetic carrier with host-guest inclusion capability; self-assembly is performed through inclusion reaction between cyclodextrin and p-aminothiophenol; finally, the detachable magnetic-microsphere-supported noble metal catalyst is prepared through complexing between sulfydryl and amino on p-aminothiophenol and noble metal nanoparticles. The adopted instruments are simple, the preparation cost is low, the operation process is simple and convenient, the reaction process requires low-toxicity and harmless materials, the species and the contents of supported noble metals can be effectively controlled, and the preparation method can be used for industrial large-batch production of the high-quality detachable magnetic-microsphere-supported noble metal catalyst.

Description

technical field [0001] The invention belongs to the technical field of magnetic microsphere-loaded precious metal catalysts and recovery of precious metal catalysts. Background technique [0002] As we all know, in the field of catalyst research, catalyst recovery and reuse are two very important consideration factors. The recycling of spent catalysts, especially the recovery of precious metal catalysts, not only has important environmental protection significance, but also enables the sustainable development of limited resources and produces certain economic benefits. Most heterogeneous catalytic systems require complicated filtration, centrifugation or more complex operations to separate the catalyst from the reaction system. The catalyst supported by the magnetic material can easily realize the separation and recovery of the catalyst without complicated operation steps. Magnetic nanocatalysts have become a new trend and development direction in the field of new green ca...

Claims

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Application Information

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IPC IPC(8): B01J31/28
CPCB01J31/065B01J31/28B01J35/33
Inventor 陈铭张鹏飞刘培培吴倩卉张秀娥还龙
Owner YANGZHOU UNIV
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