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Novel metal composite oxide catalyst and preparation method thereof

A metal composite and oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, preparation of carbon-based compounds, preparation of organic compounds, etc., can solve the problems of low utilization rate and low dispersion of active components. , to achieve the effect of high utilization rate, conducive to stable dispersion and improvement of utilization rate

Inactive Publication Date: 2020-09-29
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a novel metal composite oxide catalyst, which is used to solve the problems of low dispersion of active components and low utilization rate in the catalyst, and can be used in various oxidation or hydrogenation reactions

Method used

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  • Novel metal composite oxide catalyst and preparation method thereof
  • Novel metal composite oxide catalyst and preparation method thereof
  • Novel metal composite oxide catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a novel metal composite oxide catalyst, comprising the steps of:

[0030] A. To prevent TiCl 4 Hydrolysis, the 1.3660g TiCl 4 Dissolved in an equal volume of HCl, then mixed with 7.3850g Mg(NO 3 ) 2 ·6H 2 O and 2.7000g Al(NO 3 ) 3 9H 2 O was dissolved in 70 mL of deionized water to prepare a mixed metal salt solution.

[0031] B. Dissolve 3.6036g of urea into the mixed metal salt solution prepared in step A, adjust the pH to 10, and transfer the uniformly dissolved solution to a 100mL reactor, and react in an oven at 120°C for 12h, and the prepared precursor Scanning electron microscope such as figure 1 shown. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged, filtered and washed until neutral, dried at 60°C for 12h, and heated at 10°C·min under a mixed atmosphere of hydrogen:nitrogen = 1:4. -1 The rate is raised to 500°C for calcination and kept for 5h to obtain the composite...

Embodiment 2

[0038] A preparation method of a novel metal composite oxide catalyst, comprising the steps of:

[0039] A. Add 1.3660g TiCl 4 Dissolved in an equal volume of HCl, then mixed with 7.3850g Mg(NO 3 ) 2 ·6H 2 O and 2.7000gAl(NO 3 ) 3 9H 2 O was dissolved in 70 mL of deionized water to prepare a mixed metal salt solution.

[0040] B. Dissolve 12.00g NaOH into the mixed metal salt solution prepared in step A, adjust the pH to 9, transfer the uniformly dissolved solution to a 100mL reactor, and react in an oven at 45°C for 48h. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged, filtered and washed to neutrality, dried at 80°C for 6h, and heated at 8°C·min under a mixed atmosphere of hydrogen:nitrogen = 1:3. -1 The rate is raised to 400°C for calcination and kept for 4 hours to obtain the composite metal oxide carrier Mg 4 al 1 Ti 1 o x .

[0041] C. Weigh 1.6440g PdCl 2 and 1.4250g NaCl (to improve solubility ...

Embodiment 3

[0047] A preparation method of a novel metal composite oxide catalyst, comprising the steps of:

[0048] A. Add 3.6000g Fe(NO 3 ) 3 9H 2 O, 3.8460g Mg(NO 3 ) 2 ·6H 2 O and 3.1632gAl(NO 3 ) 3 9H 2 O was dissolved in 70 mL of deionized water to prepare a mixed metal salt solution.

[0049] B. Dissolve 5.0387g KOH into the mixed metal salt solution prepared in step A to adjust the pH to 10, and transfer the uniformly dissolved solution to a 100mL reactor, and react in an oven at 200°C for 6h. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged, filtered and washed until neutral, dried at 70°C for 18h, and heated at 2°C·min under a mixed atmosphere of hydrogen:nitrogen = 1:5. -1 The rate is raised to 500°C for calcination and kept for 4h to obtain the composite metal oxide carrier Mg 4 al 1 Fe 1 o x .

[0050] C. Weigh 1.6440g PdCl 2 and 1.4250g NaCl (to improve solubility and prevent hydrolysis) were dissol...

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Abstract

The invention relates to the field of biomedical catalysts, and discloses a preparation method of a novel metal composite oxide catalyst. The preparation method comprises the following steps: preparing a mixed metal salt solution; adding a precipitant solution into the mixed metal salt solution to prepare a layered double hydroxide precursor, and roasting in a mixed atmosphere to obtain a composite metal oxide carrier; and anchoring precious metal on the composite metal oxide carrier through an impregnation method to prepare the metal composite oxide catalyst. The method is used for solving the problems of low dispersity and low utilization rate of active components in the catalyst, and can be used for various oxidation or hydrogenation reactions.

Description

technical field [0001] The invention relates to the field of biomedical catalysts, and more specifically, to a novel metal composite oxide catalyst and a preparation method thereof. Background technique [0002] The carbon-oxygen bond is an important bond in high value-added fine chemical products. However, it is extremely challenging to design and construct a carbon-oxygen bond recombination catalyst with high activity and selectivity. [0003] Among metal catalysts, supported noble metal catalysts, usually represented by palladium, platinum, gold, ruthenium, iridium, etc., have high catalytic activity in many reactions. However, noble metals are expensive and have scarce reserves in the earth’s crust. In order to reduce costs, It is of great significance to reduce the loading of precious metals and improve the utilization rate of precious metals. However, in the actual loading process, precious metals are used as active components, and the dispersion is low, so the amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01J23/89B01J35/10C07C47/54C07C45/38
CPCB01J23/58B01J23/892B01J23/002C07C45/38B01J2523/00B01J35/394B01J35/61B01J2523/22B01J2523/31B01J2523/47B01J2523/828B01J2523/824B01J2523/847C07C47/54
Inventor 张志华李磊王煦蒋达洪崔宝臣孙婧刘淑芝
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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