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Preparation method of microcapsule-supported metal complex catalyst

A technology of metal complexes and catalysts, which is applied in the field of preparation of catalyst materials, can solve problems such as catalyst instability and deactivation, and achieve the effects of improving stability, reducing processing costs, and simple operation

Active Publication Date: 2014-02-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, many metal complex catalysts are not stable, and are easily aggregated and deactivated in water. Therefore, supported catalysts have attracted more and more attention.

Method used

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  • Preparation method of microcapsule-supported metal complex catalyst
  • Preparation method of microcapsule-supported metal complex catalyst
  • Preparation method of microcapsule-supported metal complex catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of microcapsule-loaded metal complex catalysts by double emulsion solvent evaporation: 30 mg of cyclic polyamine manganese complexes were dissolved in 6 ml of deionized water to obtain an aqueous core material solution. Fully dissolve 3 g of ethyl cellulose with 50 ml of dichloromethane to obtain a wall material solution. Stir and emulsify the aqueous solution of the core material and the dichloromethane solution of the wall material at a speed of 4000r / m, quickly pour it into the 500ml external aqueous phase solution prepared in advance, and continuously stir and emulsify at a speed of 400r / m for 60min, then put The ambient temperature was maintained at about 30° C., and the stirring and volatilization was continued to ensure that the dichloromethane therein volatilized completely. Afterwards, the resulting suspension was centrifuged at a speed of 5000 r / m to collect the product, washed with deionized water, and freeze-dried. The resulting product is tenta...

Embodiment 2

[0029] Preparation of microcapsule-supported metal complex catalysts by emulsification cross-linking method: 1 g of gelatin was completely dissolved in 10 ml of deionized water, and then 20 mg of cyclopolyamine manganese complex was dissolved therein. Emulsify the aqueous solution of the mixture obtained above into 100ml of paraffin at a stirring speed of 400r / m, cross-link the emulsified emulsion with glutaraldehyde in an ice bath, then filter out the solidified product, wash and dry . The resulting product is tentatively labeled as 2# catalyst.

Embodiment 3

[0031] Preparation of microcapsule-loaded metal complex catalysts by drying in liquid: 30 mg of cyclic polyamine manganese complex and 2 g of ethyl cellulose were fully dissolved in 20 ml of acetone, and added to 100 ml of paraffin. 400r / m emulsification and stirring, and then continue stirring the obtained emulsion at 40°C until the acetone solvent is fully volatilized, and the solidified product is filtered out, washed and dried. The resulting product is tentatively labeled as 3# catalyst.

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Abstract

The invention relates to a preparation method of a microcapsule-supported metal complex catalyst. The preparation method comprises a multiple emulsion solvent evaporation method, an emulsion crosslinking method and an in-liquid drying method. When the supported metal complex catalyst provided by the invention and hydrogen peroxide are used for catalytic oxidation treatment of wastewater containing dyes, the catalyst is high in decolorization rate, remarkable in catalytic effect and recyclable. According to the technical scheme, catalytic active components can be favorably fixed, the stability of the catalyst is improved, the preparation method is simple in operation, and the catalyst is suitable for the catalytic oxidation treatment of the wastewater containing the dyes and can be recycled many times, so that the treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of preparation of catalyst materials, in particular to a preparation method of a metal complex catalyst supported by microcapsules. Background technique [0002] The control and treatment of environmental pollution is a major problem faced by human beings and needs to be solved urgently. The increase of industrial and domestic waste has seriously affected the ecological environment on which human beings depend for survival. The research on the control of these organic pollutants has attracted widespread attention at home and abroad. The use of metal complexes as catalysts for the oxidative degradation of organic pollutants has become a hot topic of research by scholars at home and abroad in recent years. [0003] In literature [Sorokin A, Seri, J L, Meunier B. Science, 1995, 268: 1163-1166] and [Sorokin A, Suzzoni-Dezard S D, Meunier B.J Am Chem Soc, 1996, 118 (31): 7410-7411] Bernard Meunier et al. used water-solub...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/02B01J32/00C02F1/72
Inventor 毛志平宋敏张琳萍钟毅徐红尹冲秦新波
Owner DONGHUA UNIV
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