Preparation method of three-component load-type Ni-base alcohol oxidation catalyst

An oxidation catalyst and supported technology, which is applied in the field of preparation of three-component supported Ni-based alcohol oxidation catalysts, can solve the problems of low metal dispersion, easy agglomeration, and difficulty in regulation, and achieve the effect of high process repeatability.

Inactive Publication Date: 2015-05-27
TIANJIN POLYTECHNIC UNIV
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  • Application Information

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Problems solved by technology

The particle size and composition of the active component of the supported catalyst prepared by the traditional preparation method are often uneven and difficult to control, and the metal dispersion is low, the metal loading is large, easy to agglomerate, and the production cost is high.

Method used

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  • Preparation method of three-component load-type Ni-base alcohol oxidation catalyst

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Experimental program
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Embodiment 1

[0021] Take 150mL of ethylene glycol and add it into a three-necked flask, then add 1.5g of polyethylene glycol, stir and mix evenly at room temperature under an argon atmosphere. Dissolve 1mmol of nickel acetate and cobalt nitrate in 10mL of water, dissolve 1mmol of palladium acetate in 10mL of acetone solution, add the three solutions into the mixed solution of ethylene glycol, then heat up to 120°C, and keep the temperature at 30°C Minutes, then continue to heat up to 200 ° C, where the temperature is maintained for 60 minutes. After the reaction was completed, it was naturally cooled to room temperature. The nanoparticle solution was mixed with the carrier carbon black, ultrasonicated for 1 h, centrifuged, washed, and vacuum-dried at 60°C. Then under H2 atmosphere, 350 degree calcined 4 hours, obtain supported Ni-Co-Pd nanometer catalyst, as figure 1 .

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Abstract

The invention relates to a preparation method of a three-component load-type Ni-base alcohol oxidation catalyst. The preparation method comprises the steps of (1) uniformly mixing ethylene glycol and a specific surface active agent at a given ratio to obtain a mixed solution under an inert atmosphere, placing Ni metal precursor salt and a precursor solution of a second component into a mixed solution, heating the mixed solution to a specific temperature, preserving heat for a given time, and cooling the mixed solution to the room temperature; (2) uniformly mixing the obtained nano particle solution and a carrier to obtain a mixed solution, and carrying out the ultrasonic treatment on the mixed solution; (3) centrifuging the mixed solution, washing and drying; and (4) carrying out roasting reduction on a product under a hydrogen atmosphere to obtain a bi-component load-type Ni-base nano catalyst. The catalyst can be applied to the electrochemical oxidation and liquid-phase oxidation of alcohols. The prepared Ni-base catalyst is uniform in components and high in catalytic activity. The preparation method is not only simple in process, low in preparation cost and easy for realizing large-scale preparation of three-component load-type Ni-base nano catalyst.

Description

technical field [0001] A preparation method of a three-component supported Ni-based alcohol oxidation catalyst and its catalytic application, especially a three-component supported Ni-Co / Mn-Pd nano-catalyst for electrochemical oxidation of alcohols And the preparation method of liquid phase oxidation reaction. Background technique [0002] Supported Ni-based metal catalysts, such as Raney nickel, have attracted extensive attention from many researchers in the industry and scientific research circles due to their good catalytic performance, and have a wide range of industrial applications. [0003] However, so far, the methods for preparing supported Ni-based metal nanoparticles mainly focus on the impregnation method, co-precipitation method, ion exchange method and precipitation reduction method. The particle size and components of the active component of the supported catalyst prepared by the traditional preparation method are often uneven and difficult to control, and th...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J23/89
Inventor尹振张建雄谢永博
OwnerTIANJIN POLYTECHNIC UNIV