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A kind of suspended ion catalyst and its preparation method and application

A catalyst and ion technology, applied in the field of suspended ion catalyst and preparation, to achieve the effects of high yield, high catalytic activity and good stability

Active Publication Date: 2020-11-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a suspended ion catalyst and its preparation method and use in view of the existing problems of heterogeneous catalysts

Method used

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] Suspended ionic catalysts are mainly composed of two parts, which are charged ionic porous materials and oppositely charged small molecule catalysts. The preparation method of the suspended ion catalyst mainly includes the following steps: regulating and synthesizing positively or negatively charged ion-type porous materials, and then introducing a small-molecule catalyst with opposite charges by means of ion exchange. Compared with traditional heterogeneous catalysts, suspended ion catalysts have the following characteristics: the coordination number of the oxidation-reduction active metal center is low, there is no counter anion to occupy the catalytic active site, and it has high metal active site utilization, dangling bond number and space d orbital number, d electron activity is high. Compared with traditional heterogeneous catalysts, suspended ion catalysts have the following characteristics in catalyzing chemical reactions: in the catalytic reaction process, the ...

Embodiment 1

[0024] 5,10,15,20-Tetrakis(3,5-bis(4-esterylphenyl)phenyl)copper porphyrin (0.006mmol), YCl 3 (0.3mmol) and 4-sulfobenzoic acid monopotassium salt (0.1mmol) were dissolved in 5mL of DMF, and 5mL of anhydrous methanol was added to obtain a dark red clear solution after ultrasonic dissolution, which was placed in an incubator at 80°C for seven days , to obtain brown blocky crystals, which are anionic porous materials, named CZJ-18(Cu)-SB. Centrifuge, sequentially wash with DMF, EtOH and Et 2 O washed and dried naturally at room temperature, the yield was 73%.

Embodiment 2

[0026] 5,10,15,20-Tetrakis(3,5-bis(4-esterylphenyl)phenyl)zinc porphyrin (0.006mmol), YCl 3 (0.3mmol) and 4-sulfobenzoic acid monopotassium salt (0.1mmol) were dissolved in 5mL of DMF, and 5mL of anhydrous methanol was added to obtain a dark red clear solution after ultrasonic dissolution, which was placed in an incubator at 80°C for seven days , to obtain brown blocky crystals, which are anionic porous materials, named CZJ-18(Zn)-SB. Centrifuge, sequentially wash with DMF, EtOH and Et 2 O washed and dried naturally at room temperature, the yield was 69%.

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Abstract

The invention discloses a suspended ion catalyst and a preparation method and use thereof. The preparation method uses an ion porous material as a carrier and through an ion exchange method, oppositely charged ionic small molecule catalysts are introduced into channels of the carrier so that the suspended ion catalyst is obtained and is used for a heterogeneous catalytic reaction. When the suspended ion catalyst is used for catalytic oxidation of benzyl alcohol, the reaction conditions are mild, the catalytic activity is high, the pollution is avoided, the stability is good, the cost is low, the catalyst can be simply recovered and recycled, the conversion rate of the reactants and the selectivity of the product are high, and the post treatment simple.

Description

technical field [0001] The invention relates to a catalyst, in particular to a suspended ion catalyst and its preparation method and application. Background technique [0002] Catalysts are the cornerstone of the modern chemical industry. By changing the chemical reaction path, the chemical reaction can be carried out under relatively mild conditions. Compared with homogeneous catalysts, heterogeneous catalysts have the advantages of easy separation from products and reusability. The main way to realize the heterogeneity of homogeneous catalysts is to select appropriate solid materials as supports, and then immobilize molecular catalysts on the surface or pores of solid supports through strong interactions (including coordination bonds, covalent bonds, and supramolecular forces). In the channel, the purpose of preventing the loss of catalytically active components is achieved. However, this technology will inevitably cause some active centers to be blocked, so that the act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J31/18C07C47/54C07C45/29
CPCB01J31/0298B01J31/1825B01J2531/025B01J2531/16B01J2531/26C07C45/29C07C47/54Y02P20/584
Inventor 吴传德何威龙赵敏
Owner ZHEJIANG UNIV