Flower-like copper oxide catalyst and preparation method and application thereof

A copper oxide, catalyst technology, applied in the direction of copper oxide/copper hydroxide, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve unfavorable large-scale production, no relevant reports, Accelerate the reaction speed and other problems to achieve the effect of being conducive to industrial synthesis, simple preparation process and low price

Inactive Publication Date: 2012-06-20
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] It can be seen from the above report on the preparation method of flower-shaped copper oxide that expensive organic matter is generally used as a template in the preparation process, and its disadvantage is that the cost is relatively high, which is not conducive to large-scale production.
[0007] In addition, the research reports on the application of flower-shaped copper oxide in the field of catalysis are limited to liquid-solid phase catalytic reactions, such as photocatalytic degradation of dyes or oxidation reactions of organic alcohols, while for gas-solid phase heterogeneous catalytic reactions such as industrial direct There have been no relevant reports on the application of synthetic organosilicon monomers, especially in the synthesis process of organosilicon monomers, the reaction between the reactant methyl chloride gas and silicon powder belongs to the gas-solid phase contact reaction, which requires The contact between the catalyst and the reactants can be sufficient to speed up the reaction

Method used

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  • Flower-like copper oxide catalyst and preparation method and application thereof
  • Flower-like copper oxide catalyst and preparation method and application thereof
  • Flower-like copper oxide catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 1.0gCu(NO 3 ) 2 ·3H 2 O was dissolved in 50.0ml of absolute ethanol (the concentration of copper ions was 0.08mol / L), and 30.0ml of concentrated ammonia water (commercially available mass fraction was 25-28wt%), 0.4g of NaOH and 5.0g of NaNO were sequentially added at room temperature 3 , after stirring for 30 minutes, a clear and transparent blue solution (ammonia concentration 6.2mol / L, NaOH concentration 0.1mol / L, NaNO 3 Concentration 0.7mol / L), and then transferred to a 150ml stainless steel reactor lined with polytetrafluoroethylene, heated to 130°C for 18h. After the reaction, the black product was filtered, washed five times with water and absolute ethanol, and dried in a vacuum oven at 60° C. for 8 hours to obtain 0.3 g of copper oxide catalyst with a yield of 90.9 wt%.

[0038] The copper oxide catalyst material prepared above was subjected to an XRD test on an X'Pert PRO MPD multifunctional X-ray diffractometer produced by Panalytical Company of the N...

Embodiment 2

[0043] Weigh 0.2gCu(NO 3 ) 2 ·3H 2 O was dissolved in a mixed solvent of 28.0ml of absolute ethanol and 22.0ml of water (copper ion concentration was 0.02mol / L), and 22.0ml of concentrated ammonia water (25-28wt%), 0.3g of NaOH and 2.8g of NaNO were sequentially added at room temperature 3 , after stirring for 30 minutes, a clear and transparent blue solution (ammonia concentration 5.0mol / L, NaOH concentration 0.1mol / L, NaNO 3 Concentration 0.5mol / L), and then transferred to a 150ml stainless steel reactor lined with polytetrafluoroethylene, heated to 80°C for 48h. After the reaction, the black product was filtered, washed five times with water and absolute ethanol, and dried in a vacuum oven at 60° C. for 8 hours to obtain 0.05 g of copper oxide catalyst with a yield of 91.0 wt%. XRD spectrum analysis shows that the crystal structure of the product is cubic crystal system CuO. SEM photos show that the morphology of copper oxide presents a flower-like structure, and the flo...

Embodiment 3

[0045] Weigh 12.1gCu(NO 3 ) 2 ·3H 2 O was dissolved in a mixed solvent of 2.5ml absolute ethanol and 47.5ml water (copper ion concentration was 1.0mol / L), and 77.2ml concentrated ammonia water (25-28wt%), 10.2gNaOH and 21.6gNaNO were added successively at room temperature 3 After stirring for 30 minutes, a clear and transparent blue solution (ammonia concentration 10.0mol / L, NaOH concentration 2.0mol / L, NaNO3 concentration 2.0mol / L) was obtained, and then transferred to a 150ml stainless steel reactor lined with polytetrafluoroethylene , heated to 160°C for 0.25h. After the reaction, the black product was filtered, washed five times with water and absolute ethanol, and dried in a vacuum oven at 60° C. for 8 hours to obtain 3.8 g of copper oxide catalyst with a yield of 95.0 wt%. XRD spectrum analysis shows that the crystal structure of the product is cubic CuO. SEM photos show that the morphology of copper oxide presents a flower-like structure, and the flower-like particle...

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Abstract

The invention relates to a flower-shaped copper oxide catalyst and a preparation method and application thereof to the direct synthesis of an organic silicon monomer. The preparation method of the flower-shaped copper oxide catalyst comprises the following steps: (1) adding copper salt to ethanol or mixed solvent of ethanol and water to form solution; and (2) stirring and adding ammonia, strong alkali and nitrate to the solution in sequence to obtain a homogeneous solution, transferring the homogeneous solution to a reactor to carry out the thermal reaction of a solvent, and controlling the amount of the product of reaction, the reaction temperature and the reaction time to obtain the lower-shaped copper oxide catalyst. The preparation process of the flower-shaped copper oxide catalyst has simple experiment procedures and low cost, is convenient to operate, is environment-friendly and can be produced on a large scale. The prepared flower-shaped copper oxide powder can be used as the catalyst to the field of the direct synthesis of the organic silicon monomer, and particularly, the flower-shaped copper oxide powder is highly selective for the dimethyldichlorosilane monomer.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and its application, in particular to a flower-shaped copper oxide catalyst, its preparation method and its application in the field of direct synthesis of organosilicon monomers. Background technique [0002] As a type of p-type transition metal oxide, copper oxide exhibits peculiar physical and chemical properties in the fields of electricity, magnetism and catalysis, which has attracted widespread attention and is widely used in important fields such as printing and dyeing, ceramics, electrode active materials and catalysts. field. The physical and chemical properties of copper oxide are influenced by morphology, size and structure. In recent years, copper oxide materials with different morphological structures have attracted great interest, and copper oxide nanowires, nanorods, nanosheets, nanotubes, nanobelts, etc. have been prepared by different methods. Some more complex structures su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y40/00B01J23/72
Inventor 苏发兵车红卫王莹利宋莲英翟世辉朱德洪
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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