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Nickel-cobalt-boron amorphous alloy nanosphere catalyst with hollow structure, preparation method and application of catalyst

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

Inactive Publication Date: 2014-06-25
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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  • Nickel-cobalt-boron amorphous alloy nanosphere catalyst with hollow structure, preparation method and application of catalyst
  • Nickel-cobalt-boron amorphous alloy nanosphere catalyst with hollow structure, preparation method and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 100mL 0.01mol / L Bu in the beaker 4 PBr aqueous solution, and then add 5mL 0.1mol / L NiCl 2 And CoCl 2 Aqueous solution, stir well. KCl solid was added to the solution until it was supersaturated, and stirring was continued for 10 minutes. Under 273K and vigorous stirring, add 10mL 0.5mol / L KBH dropwise to the above solution 4 After the addition of the aqueous solution, continue to stir for 30 minutes. A black solid was obtained by centrifugation, which was repeatedly washed with deionized water until it became neutral, which was recorded as NiCoB(H)-P.

[0025] figure 1 In the XRD spectrum of the sample prepared in 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 picture of the sample prepared in this example shows that the obtained sample has a hollow nanosphere morphology with a diameter of about 40 nm.

Embodiment 2

[0027] Add 100mL 0.01mol / L Bu in the beaker 4 NBr aqueous solution, and then add 5mL 0.1mol / L NiCl respectively 2 And CoCl 2 Aqueous solution, stir well. KCl solid was added to the solution until it was supersaturated, and stirring was continued for 10 minutes. Under 273K and vigorous stirring, add 10mL0.5mol / L KBH dropwise to the above solution 4 After the addition of the aqueous solution, continue to stir for 30 minutes. A black solid was obtained by centrifugation, which was repeatedly washed with deionized water until it became neutral, which was recorded as NiCoB(H)-N.

Embodiment 3

[0029] Add 50mL 0.01mol / L Bu into the beaker 4 PBr and Bu 4 NBr aqueous solution, and then add 5mL 0.1mol / L NiCl respectively 2 And CoCl 2 Aqueous solution, stir well. KCl solid was added to the solution until it was supersaturated, and stirring was continued for 10 minutes. Under 273K and vigorous stirring, add 10mL0.5mol / L KBH dropwise to the above solution 4 After the addition of the aqueous solution, continue stirring for 30 minutes. A black solid was obtained by centrifugation, which was repeatedly washed with deionized water until it became neutral, which was recorded 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, in particular to a method for preparing a nickel-cobalt-boron amorphous alloy nanosphere with a hollow structure, and the catalyst is hydrogenated in the liquid phase of octenal to produce 2-ethyl Application in hexanol; belongs to the field of catalyst technology. Background technique [0002] 2-Ethylhexanol is widely used as a raw material for PVC plasticizers, coatings, adhesives, printing inks and impregnating agents, etc. It is a valuable synthetic alcohol. At present, the industrial production of 2-ethylhexanol is mainly obtained from the hydrogenation of octenal. Since this process inevitably produces incomplete hydrogenation products 2-ethylhexanal and 2-ethyl-2-hexenol, two-step hydrogenation reactions are generally used in industry for production. First, copper-chromium is used as a catalyst to hydrogenate octenal under gas phase conditions; then, a modified palladium-based...

Claims

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Application Information

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Patent Type & Authority Applications(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
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