Co-Th-B amorphous alloy catalyst and preparation and use thereof

A technology of amorphous alloy and catalyst, which is applied in the field of Co-B amorphous alloy catalyst and its preparation, can solve the problems of insufficient selectivity, high production cost, poor catalytic activity, etc., and achieve simple operation process and no production Effects of environmental pollution and easy availability of raw materials

Inactive Publication Date: 2008-11-12
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industry mainly produces cinnamyl alcohol by reducing cinnamaldehyde with isopropyl aluminum or benzylidene aluminum. This process not only has high production costs, but also causes serious environmental pollution.
Studies have shown that the application of Co-B amorphous alloy catalysts in the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol is not only beneficial to reduce costs, but also to clean the environment, but there are still poor catalytic activity and selectivity. Not high enough defect

Method used

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  • Co-Th-B amorphous alloy catalyst and preparation and use thereof
  • Co-Th-B amorphous alloy catalyst and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The pH value is greater than 13, the concentration of KBH is 2.0mol / L 4 Mixture of aqueous solution and 0.2mol / L NaOH aqueous solution KBH 4 -NaOH aqueous solution, add CoCl dropwise 2 And Th(NO 3 ) 4 In the mixed solution, where: Co 2+ With Th 4+ The mass ratio is 19:1, KBH 4 With Co 2+ And Th 4+ The molar ratio is 5:1. The temperature in the reaction system is controlled at 20°C and reacted for 30 minutes to ensure that the metal ions are completely reduced; the collected Co-Th-B catalyst is first washed with deionized water to neutrality, and then Wash with absolute ethanol, and finally store in absolute ethanol.

[0018] The prepared Co-Th-B catalyst is analyzed by ICP and the mole percentages of the components are: Co61.8%, Th 0.2%, B 38.0%, and its active specific surface area is 9.8m measured by the TPD method. 2 / g. The selected area electron diffraction spectrum and X-ray diffraction spectrum are shown in figure 1 with figure 2 As shown, it can be seen that the pr...

Embodiment 2

[0020] The difference between this embodiment and embodiment 1 lies in: the Co used 2+ With Th 4+ The mass ratio of is 2:1, and the rest is the same as described in Example 1.

[0021] The prepared Co-Th-B catalyst is analyzed by ICP and the mole percentages of the components are: Co57.0%, Th 1.0%, B 42.0%, and its active specific surface area measured by TPD method is 7.3m 2 / g.

Embodiment 3

[0023] The difference between this embodiment and embodiment 1 lies in: the Co used 2+ With Th 4+ The mass ratio of is 6:1, and the rest is the same as described in Example 1.

[0024] The prepared Co-Th-B catalyst is analyzed by ICP and the mole percentages of the components are: Co 59.2%, Th 0.6%, B 40.2%, and its active specific surface area measured by TPD method is 8.6m 2 / g.

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Abstract

The invention discloses a Co-Th-B amorphous alloy catalyst, preparation and application thereof. The Co-Th-B amorphous alloy catalyst, wherein mol percentage of each component is that: Co 57-64%, Th 0.1-1%, B 36-42%, is proved to have obvious amorphous structure and active specific surface area of 7-12 m<2>/g after being detected by selected area electron diffraction and X ray diffraction,. The Co-Th-B amorphous alloy catalyst of the invention has excellent catalytic performance for Alpha, Beta unsaturated aldehyde hydrogenation reaction, especially has excellent catalytic activity, high selectivity and service life for liquid phase selective hydrogenation reaction of cinnamic alcohol prepared by cinnamic aldehyde. The Co-Th-B amorphous alloy catalyst of the invention also has simple operating process, easily-obtained materials, no environmental pollution in preparing process and is hopeful to be novel high-efficiency and green-friendly catalytic material.

Description

Technical field [0001] The invention relates to a Co-B amorphous alloy catalyst and a preparation method and application thereof, in particular to a Co-B amorphous alloy catalyst Co-Th-B doped with rare earth element Th and its preparation The method and its application in the selective hydrogenation reaction of the liquid phase cinnamaldehyde to prepare cinnamyl alcohol. Background technique [0002] Amorphous alloy is a new type of catalytic material with long-range disorder and short-range order. Its unique structural characteristics endow it with excellent catalytic activity, selectivity, anti-poisoning and corrosion resistance. At the same time, it also has environmentally friendly characteristics. The most promising high-efficiency and environmentally friendly new catalytic materials in the 21st century. [0003] At present, the most widely used amorphous alloy catalysts are mainly concentrated on binary amorphous alloys, such as Ni-B, Co-B and Ru-B catalysts. There is a li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J21/02C07C29/141C07C33/32
Inventor 孟琦李和兴刘俊
Owner SHANGHAI NORMAL UNIVERSITY
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