Benzyl alcohol selective oxidation catalyst, preparation method and application thereof

An oxidation catalyst, a technology of benzyl alcohol, applied in the directions of oxidation preparation of carbonyl compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the catalytic activity needs to be improved, and achieve a simple preparation method. , the effect of high catalytic activity

Inactive Publication Date: 2009-10-28
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Mg 2.5 Ni 0.5 Al catalyst realizes the "green" oxidation of benzyl alcohol to benzaldehyde, but its catalytic activity still needs to be improved

Method used

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  • Benzyl alcohol selective oxidation catalyst, preparation method and application thereof
  • Benzyl alcohol selective oxidation catalyst, preparation method and application thereof
  • Benzyl alcohol selective oxidation catalyst, preparation method and application thereof

Examples

Experimental program
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example 1-4

[0032] Examples 1-4 illustrate the preparation of magnesium aluminum spinel using the method provided by the present invention with different aluminum sources, magnesium sources and preparation conditions. The formula used and the properties of the synthesized magnesium aluminum spinel are shown in Table 1. The specific preparation method of magnesium aluminum spinel is as follows: (1) Weigh a certain amount of aluminum source and magnesium source compound and dissolve them in 50 ml of deionized water to prepare mixed solution I; (2) Under continuous and rapid stirring conditions , Add 216 ml of 25% by weight ammonia dropwise to mixed solution I; and add 0.36 g of cetyltrimethyl amine bromide to make mixed solution II; the molar ratio of each component in the mixture is about, Al: Mg:OH - : Surfactant: H 2 O=2:1:3:0.1:10; (3) After the dripping is completed, the mixed solution II continues to be stirred at room temperature for a certain period of time, and then allowed to stand fo...

example 5-8

[0037] Examples 5-8 illustrate the preparation of magnesium aluminum spinel using the method provided by the present invention with different surfactants, lye and preparation conditions. The formula used and the properties of the synthesized magnesium aluminum spinel are shown in Table 2. The specific preparation method of magnesium aluminum spinel is as follows: (1) Weigh a certain amount of aluminum source and magnesium source compound and dissolve them in 50 ml of deionized water to prepare mixed solution I; (2) Under continuous and rapid stirring conditions , Add a certain amount of lye dropwise to the mixed solution I; and add an appropriate amount of surfactant to make the mixed solution II; the molar ratio of each component in the mixture is about, Al:Mg:OH - : Surfactant: H 2 O=2:1:3:0.1:10; (3) After the dropwise addition is completed, the mixed solution II continues to be stirred at room temperature for 1 hour and allowed to stand for 8 hours; (4) The aged mixture is fil...

example 9-12

[0042] Examples 9-12 illustrate the preparation of magnesium aluminum spinel using the method provided by the present invention with different raw material ratios and preparation conditions. The formula used and the properties of the synthesized magnesium aluminum spinel are shown in Table 3. The specific preparation method of magnesium aluminum spinel is as follows: (1) Weigh a certain amount of aluminum source and magnesium source compound and dissolve them in 50 ml of deionized water to prepare mixed solution I; (2) Under continuous and rapid stirring conditions , Add 216 ml of 25% by weight ammonia dropwise to mixed solution I; and add 0.36 g of cetyltrimethyl amine bromide to make mixed solution II; the molar ratio of each component in the mixture is about, Al: Mg:OH - : Surfactant: H 2O=2:1:3:0.1:10; (3) After the dripping is completed, the mixed solution II is continuously stirred for 0.5 hours at room temperature and allowed to stand for 4 hours; (4) The aged mixture is fi...

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Abstract

The invention discloses a benzyl alcohol selective oxidation catalyst, which consists of a carrier and metal components, wherein the carrier is MgAl2O4, the metal components are selected from one or more metallic oxides of V, Mo, W, Ag, Cu, Zn, Co, Ni, Fe or Sn, and in terms of the total weight of the catalyst, the catalyst comprises 80.0 to 99.9 percent of the MgAl2O4 and 0.1 to 20.0 percent of the metallic oxides. The specific surface areas of the prepared carrier MgAl2O4 and the MeOx/MgAl2O4 catalyst are between 200 and 400 m/g, the most probable pore diameter is between 3 and 6 nanometers, and the particle size is less than 100 nanometers.

Description

Technical field [0001] The invention belongs to the technical field of catalysts and their preparation. Specifically, it relates to a high specific surface area, mesoporous, ultrafine magnesium aluminum spinel supported transition metal oxide catalyst and its preparation method, and its use in the realization of "green", highly efficient catalytic oxidation of benzyl alcohol to benzaldehyde technology. technical background [0002] Benzaldehyde (commonly known as bitter almond oil) is an important fine chemical intermediate and the most important aromatic aldehyde in industry. It is widely used in the production of medicines, spices, pesticides, dyes, and plastic additives. There is a large demand for benzaldehyde in my country, among which high-quality benzaldehyde needs to be imported. It is predicted that the demand for benzaldehyde in my country will increase at an annual rate of 7%, and the market demand for benzaldehyde in my country will reach 30,000 tons / year by 2015. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/755B01J23/22B01J23/28B01J23/50B01J23/72B01J23/75C07C47/54C07C45/29C07C45/38
Inventor 张昕
Owner NORTHWEST UNIV(CN)
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