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A kind of composite fiber catalyst with metal nanoparticles loaded on the surface and its application

A technology of metal nanoparticles and composite fibers, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of unfavorable large-scale production, complicated process, and high cost. Achieve the effect of excellent recovery and recycling, high catalytic activity and convenient operation

Active Publication Date: 2017-07-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing impregnation method, ion exchange method and other methods are complicated in process, need to strictly control the operating conditions, and the cost is high, which is not conducive to large-scale production

Method used

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  • A kind of composite fiber catalyst with metal nanoparticles loaded on the surface and its application
  • A kind of composite fiber catalyst with metal nanoparticles loaded on the surface and its application
  • A kind of composite fiber catalyst with metal nanoparticles loaded on the surface and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Mix 5.2 g of ethyl orthosilicate, 1.5 g of absolute ethanol and 1.0 g of dilute hydrochloric acid with a concentration of 36-38%, and stir magnetically for 12 hours to obtain the carrier precursor;

[0040] (2) Dissolve 3 g of PVP in 25 ml of a mixed solvent composed of DMSO and DMF at a volume ratio of 4:1, and stir for 12 hours to obtain the PVP precursor;

[0041] (3) PdCl 2 Dissolve 0.2g in 4ml of a mixed solvent composed of PVP and DMF with a mass volume ratio of 1g:4ml, and disperse until uniform by ultrasonic to obtain a metal precursor;

[0042] (4) Mix and stir the solution obtained in steps (1) to (3) for 2 hours to obtain the electrospinning precursor solution, which is poured into a syringe; the syringe containing the electrospinning precursor solution is placed in the electrospinning machine, and Spinning was carried out under the conditions of a voltage of 15KV, an injection rate of 1.0mL / h, and a distance between the needle and the receiver of 15cm t...

Embodiment 2

[0046] (1) Mix 5 g of tetraethyl orthosilicate, 1 g of absolute ethanol and 0.5 g of dilute hydrochloric acid with a concentration of 36-38%, and stir magnetically for 10 hours to obtain the carrier precursor;

[0047] (2) Dissolve 2 g of PVP in 25 ml of a mixed solvent composed of DMSO and DMF at a volume ratio of 3:1, and stir for 10 hours to obtain the PVP precursor;

[0048] (3) PdCl 2 Dissolve 0.1g in 4ml of a mixed solvent composed of PVP and DMF with a mass volume ratio of 0.8g:4ml, and disperse until uniform by ultrasonic to obtain a metal precursor

[0049] (4) Mix and stir the solution obtained in steps (1) to (3) for 1 hour to obtain the electrospinning precursor solution, which is poured into a syringe; the syringe containing the electrospinning precursor solution is placed in the electrospinning machine, and Spinning was carried out under the conditions of a voltage of 5KV, an injection rate of 1.0mL / h, and a distance of 5cm between the needle and the receiver to...

Embodiment 3

[0052] (1) Mix 6 g of tetraethyl orthosilicate, 2 g of absolute ethanol and 1.5 g of dilute hydrochloric acid with a concentration of 36-38%, and stir magnetically for 15 hours to obtain the carrier precursor;

[0053] (2) Dissolve 4 g of PVP in 25 ml of a mixed solvent composed of DMSO and DMF at a volume ratio of 5:1, and stir for 15 hours to obtain the PVP precursor;

[0054] (3) PdCl 2 Dissolve 0.3g in 4ml of a mixed solvent composed of PVP and DMF with a mass volume ratio of 1.2g:4ml, and disperse until uniform by ultrasonic to obtain a metal precursor

[0055] (4) Mix and stir the solution obtained in steps (1) to (3) for 3 hours to obtain the electrospinning precursor solution, which is poured into a syringe; the syringe containing the electrospinning precursor solution is placed in the electrospinning machine, and Spinning is carried out under the conditions of a voltage of 50KV, an injection rate of 5.0mL / h, and a distance between the needle and the receiver of 30cm ...

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Abstract

The invention relates to a composite fiber catalyst with metal nanoparticles loaded on the surface. The catalyst is prepared by a method comprising the following steps: preparing an electrospinning precursor solution, pouring it into a syringe, placing it in an electrospinning machine for spinning, and performing two high-temperature calcinations on the fiber film obtained by spinning, Then use hydrogen reduction to obtain a composite fiber catalyst with metal nanoparticles loaded on the surface. The present invention further protects the application of the composite fiber catalyst with metal nanoparticles loaded on the surface in the catalytic hydrogenation reaction of unsaturated organic compounds. The preparation process of the catalyst provided by the invention is simple, easy to operate, low in cost, and strong in controllability, and inorganic composite fibers loaded with metal nanoparticles with uniform size distribution can be obtained as required, and the catalyst has good stability and does not require oxygen barrier operation, The hydrogenation reaction conditions are mild, the catalytic activity is high, and the catalyst is easy to recycle and reuse, which is beneficial to industrial application.

Description

technical field [0001] The invention relates to a catalyst for catalyzing hydrogenation reaction, in particular to a composite fiber catalyst with metal nanoparticles loaded on the surface. Background technique [0002] Catalytic hydrogenation plays an important role in petroleum refining, organic chemical industry, inorganic chemical industry, environmental protection (such as waste gas treatment) and other fields. In catalytic hydrogenation, precious metal elements such as platinum, rhodium, palladium, ruthenium, iridium, nickel, etc. are usually used as catalytic active components. [0003] According to the phase between the catalyst and the reactant in the catalytic hydrogenation reaction, the catalyst is usually divided into a homogeneous catalyst and a supported catalyst. The homogeneous catalyst has high catalytic activity, but it is difficult to realize the recovery of the catalyst, thereby increasing the cost and the residual catalyst is likely to adversely affect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44C07C15/073C07C13/18C07C9/15C07C5/11C07C5/03C07C53/122C07C51/36C07B35/02
CPCY02P20/584
Inventor 岳冬梅邹锐刘力温世鹏梁美丽张立群
Owner BEIJING UNIV OF CHEM TECH