Preparation method of copper and ferrum composite catalyst loaded on aluminum surface

A composite catalyst, aluminum surface technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Expensive, unsuitable for industry, etc., to achieve the effect of easy recycling, low cost, and efficient catalytic reaction

Inactive Publication Date: 2015-02-18
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above catalysts still have significant drawbacks, making them unsuitable for industrial
Mainly the expensive metal palladium is used, resulting in expensive catalysts
And because metal palladium has higher toxicity, it is difficult to apply to the pharmaceutical industry with strict control of heavy metals.

Method used

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  • Preparation method of copper and ferrum composite catalyst loaded on aluminum surface
  • Preparation method of copper and ferrum composite catalyst loaded on aluminum surface
  • Preparation method of copper and ferrum composite catalyst loaded on aluminum surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Plating solution preparation: Dissolve 3.8 mg of ferric chloride and 4.3 mg of copper chloride in xylene to form a 15 ml plating solution.

[0018] Preparation method: under the protection of nitrogen, put 5 pieces of metal aluminum foil (each with a length of 1 cm and a width of 1 cm) in 15 ml of the above-mentioned plating solution, and heat for 3 hours at the temperature of the plating solution at 100°C After cooling. After cooling, the aluminum foil is taken out, washed successively with ethanol and deionized water, and a clean copper-iron composite solid sheet loaded on the surface of the aluminum foil is obtained.

[0019] Place 61 mg of phenylboronic acid (0.5 mmol), 138 mg of potassium carbonate (1.0 mmol), 102 mg of iodobenzene (0.5 mmol) and the above sheet in 2 mL of ethanol, and react at the temperature of the mixture at 80°C . The reaction was monitored by thin layer chromatography. After the reaction, the catalyst was taken out (it can be directly appli...

Embodiment 2

[0021] Other conditions are the same as in Example 1, the catalyst is recovered, and the recycling efficiency of the catalyst is checked. The experimental results are shown in Table 1.

[0022] Table 1 Catalyst recycling efficiency test

[0023]

[0024] Cycles 1 2 3 4 5 6 7 Yield / % 93 91 87 80 72 60 54

[0025] As can be seen from the above, the catalyst can be conveniently recycled for many times while maintaining activity.

Embodiment 3

[0027] Other conditions were the same as in Example 1, and the catalyst activity of different carriers was tested by using zinc flakes, iron flakes, copper flakes, manganese flakes, and magnesium flakes respectively, and the experimental results are shown in Table 2.

[0028] Table 2 Test of activity of catalysts with different supports

[0029]

[0030] From the above, it can be seen that only aluminum as a carrier (Example 1) can prepare a catalyst with high catalytic activity. Other metals cannot be used as carriers.

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Abstract

The invention discloses a preparation method of a copper and ferrum composite catalyst loaded on an aluminum surface, and relates to the technical field of organic synthesis. According to the method, cheap, available and easy-to-recycle metal aluminum is taken as a carrier; metal copper and ferrum are loaded through redox reaction; and large specific surface area is formed by corrosion in a weak alkaline environment, and thus the activity of the catalyst can be improved, and the efficient catalytic reaction is achieved. The copper and ferrum composite catalyst loaded on the aluminum surface has the advantages of being cheap, easy to prepare, low in toxicity, easy to recycle and the like, and is suitable for application in pharmacy industry.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for preparing a copper-iron composite catalyst loaded on the surface of aluminum. Background technique [0002] Metal-catalyzed reactions are one of the most important tools in organic synthesis, and have been widely used in the fields of drug synthesis, pesticide synthesis, and natural product synthesis. However, traditional homogeneous catalysts have disadvantages such as large amount of catalyst used, difficult recovery of catalyst, and use of a large number of ligands and additives, thus causing harm to the environment. Heterogeneous nanocatalysts are recyclable, and the reaction is simple, often without the use of ligands and additives, so it is a catalyst more suitable for industrial production. [0003] However, the recovery and utilization process of heterogeneous catalysts is complicated and needs to be recovered by filtration or centrifugation. If i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C07C15/14C07C1/32
Inventor 俞磊魏峥范磊陈天杨成根徐清
Owner YANGZHOU UNIV
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