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A nickel-cobalt-boron amorphous alloy nanosphere catalyst with a hollow structure and its preparation method and application

An amorphous alloy, nickel-cobalt-boron technology, which is used in the preparation of amorphous alloy catalysts, the preparation of nickel-cobalt-boron amorphous alloy nanospheres, and the hydrogenation of catalysts in octenal liquid phase to produce 2-ethylhexyl The application field of alcohol can solve the problems of increasing cost of precious metal palladium, high production energy consumption, complex process, etc., and achieve the effects of improving rate and selectivity, improving catalytic activity and reducing cost.

Inactive Publication Date: 2016-05-18
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, there are some shortcomings in the current production process: the two-step method increases the production cost and the process is complicated; the gas phase hydrogenation reaction temperature and pressure are high, and the production energy consumption is high; the use of chromium-containing catalysts causes serious environmental pollution; the use of precious metal palladium increased production costs
Therefore, nickel-cobalt-boron amorphous alloy nanospheres with a hollow structure will have the advantages of higher catalytic hydrogenation activity and easy operation, but there is no invention of hollow nickel-cobalt-boron amorphous alloy nanospheres in the prior art so far.

Method used

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  • A nickel-cobalt-boron amorphous alloy nanosphere catalyst with a hollow structure and its preparation method and application
  • A nickel-cobalt-boron amorphous alloy nanosphere catalyst with a hollow structure and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 100mL0.01mol / L Bu in the beaker 4 PBr aqueous solution, then add 5mL of 0.1mol / L NiCl 2 and CoCl 2 aqueous solution, stir well. Further solid KCl was added to the solution until supersaturation, and stirring was continued for 10 minutes. 273K and under vigorous stirring, add 10 mL of 0.5 mol / L KBH dropwise to the above solution 4 Aqueous solution, stirring was continued for 30 minutes after the dropwise addition was completed. Centrifuge to obtain a black solid, which is repeatedly washed with deionized water until neutral, which is designated as NiCoB(H)-P.

[0025] figure 1 From the XRD spectrum of the sample prepared for this example, it can be seen that there is a broadened dispersion peak near the 45° position, indicating that the sample has an amorphous alloy structure. figure 2 The TEM photo of the sample prepared in this example shows that the obtained sample is in the shape of a hollow nanosphere with a diameter of about 40 nm.

Embodiment 2

[0027] Add 100mL0.01mol / L Bu in the beaker 4 NBr aqueous solution, and then add 5mL of 0.1mol / L NiCl 2 and CoCl 2 aqueous solution, stir well. Further solid KCl was added to the solution until supersaturation, and stirring was continued for 10 minutes. 273K and under vigorous stirring, add 10 mL of 0.5 mol / L KBH dropwise to the above solution 4 Aqueous solution, stirring was continued for 30 minutes after the dropwise addition was completed. A black solid was obtained by centrifugation, which was repeatedly washed with deionized water until neutral, which was designated as NiCoB(H)-N.

Embodiment 3

[0029] Add 50mL0.01mol / L Bu in the beaker 4 PBr and Bu 4 NBr aqueous solution, and then add 5mL of 0.1mol / L NiCl 2 and CoCl 2 aqueous solution, stir well. Further solid KCl was added to the solution until supersaturation, and stirring was continued for 10 minutes. 273K and under vigorous stirring, add 10 mL of 0.5 mol / L KBH dropwise to the above solution 4 Aqueous solution, stirring was continued for 30 minutes after the dropwise addition was completed. A black solid was obtained by centrifugation, which was repeatedly washed with deionized water until neutral, which was designated as NiCoB(H)-P,N.

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Abstract

The invention discloses a nickel-cobalt-boron amorphous alloy nanosphere catalyst with a hollow structure, a preparation method and application of the catalyst. The method comprises the following steps: respectively adding an aqueous solution of nickel inorganic salt and cobalt inorganic salt into an aqueous solution of a cationic surface active agent, and stirring to be uniform, wherein a mole ratio of the surfactant, nickel ions and cobalt ions is 2:1:1; adding potassium chloride solid into the solution to form a saturated solution, stirring for 10 minutes; dropwise adding a potassium borohydride aqueous solution at temperature of 273K, wherein a mole ratio of the potassium borohydride, the nickel ions and the cobalt ions is 10:1:1; continuing to for 30 minutes after the dropping is ended; centrifuging to obtain a black solid, repetitively scrubbing the black solid by using deionized water to be neutral. The prepared catalyst is large in specific surface area and high in catalytic activity; due to the application of the prepared catalyst in preparation of 2-ethylhexanol in an octenal solution through hydrogenation and preparation of corresponding alcohols by hydrogenating relevant aldehydes, the prepared alcohol products are high in purity, and the catalyst is high in stability.

Description

technical field [0001] The invention relates to the preparation of an amorphous alloy catalyst, specifically a method for preparing nickel-cobalt-boron amorphous alloy nanospheres with a hollow structure, and the preparation of 2-acetylene by hydrogenation of octenal in the liquid phase of the catalyst. Application in base hexanol; belongs to the technical field of catalysts. Background technique [0002] 2-Ethylhexanol is widely used as a raw material for polyvinyl chloride plasticizers, coatings, adhesives, printing inks, and impregnating agents. It is a valuable synthetic alcohol. Now, the industrial production of 2-ethylhexanol is mainly obtained by hydrogenation of octenal. Since this process will inevitably produce incomplete hydrogenation products 2-ethylhexanal and 2-ethyl-2-hexenol, the industry generally adopts two-step hydrogenation reaction for production. First, copper-chromium was used as a catalyst to hydrogenate octenal under gas-phase conditions; then, a m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/08B82Y30/00B82Y40/00C07C31/125C07C29/141C07C29/17
Inventor 李辉魏巍赵羽李和兴
Owner SHANGHAI NORMAL UNIVERSITY