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Au/BW11/Al2O3 catalyst and its preparation method and use

A BW11, catalyst technology, applied in the field of Au/BW11/Al2O3 catalyst and its preparation and application, to achieve the effect of mild conditions, good conversion rate and selectivity

Inactive Publication Date: 2015-10-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of POMs-supported nano-gold catalysts for olefin epoxidation is still a new challenge.

Method used

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  • Au/BW11/Al2O3 catalyst and its preparation method and use
  • Au/BW11/Al2O3 catalyst and its preparation method and use
  • Au/BW11/Al2O3 catalyst and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Catalyst activity evaluation. After calcination of 0.25 g catalyst at 500 °C, it was placed in a PTFE-lined autoclave (volume = 20 mL), 5 g of cyclooctene, molecular oxygen as oxidizing agent and TBHP initiator at 80 °C under a pressure of 0.4 MPa C was reacted for 24 hours. The conversion rate of cyclooctene oxidation was 42.92%, and the selectivity of epoxy cyclooctane was 90.02%.

Embodiment 2

[0040]Catalyst activity evaluation. 0.15 g of catalyst calcined at 500 °C was used for the reaction after 3 cycles. 5 g of cyclooctene, molecular oxygen as an oxidizing agent, and TBHP initiator were reacted at 80°C for 24 hours under a pressure of 0.4 MPa. The conversion rate of cyclooctene oxidation was 36.59%, and the selectivity of epoxy cyclooctane was 85.29%.

Embodiment 3

[0042] Catalyst activity evaluation. 0.15 g of catalyst calcined at 500°C was used for the reaction. 5 g of cyclooctene was dissolved in a 1:1 solution of 2-dichloroethane and acetonitrile, molecular oxygen as an oxidizing agent and a TBHP initiator were reacted at 80°C for 24 hours under a pressure of 0.4 MPa. The obtained cyclooctene oxidation conversion rate is 46.64%, and the selectivity of epoxy cyclooctane is 97.31%.

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Abstract

The invention discloses an Au / BW11 / Al2O3 catalyst and its preparation method and use. Al2O3 is orderly loaded with BW11 and nano-gold so that the Au / BW11 / Al2O3 catalyst is formed. The Al2O3 is used as a catalyst carrier and Au and BW11 are used as catalyst main active components. The Au / BW11 / Al2O3 catalyst has high loading efficiency and a good dispersion degree. The Au / BW11 / Al2O3 catalyst has the characteristics of high activity and good selectivity of cyclooctene epoxidation preparation of epoxycyclooctane and satisfies industrial production requirements.

Description

technical field [0001] The present invention relates to a kind of Au / BW 11 / Al 2 o 3 Catalysts and their use in the epoxidation of cyclooctene. Background technique [0002] From the perspective of basic research and industrial application of organic synthetic chemistry, epoxidation of olefins is undoubtedly very important, because epoxy compounds are essential raw materials for epoxy resins, pigments and surfactants. They are irreplaceable intermediates in many organic syntheses, such as in nucleophilic ring openings, contributing to the diversity of functional products, from small molecules to large-sized polymers and oligomers. At present, for the solvent-free epoxidation system using oxygen as the oxidant, the activation of molecular oxygen under mild conditions is still very difficult, and the process of electrophilic addition of oxygen to olefins to form epoxides is still the main challenge. [0003] Polyoxometalates (POMs) have gained great attention in the past f...

Claims

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Application Information

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IPC IPC(8): B01J23/68C07D303/04C07D301/10C07D301/06
Inventor 朱明乔乌莎贾米尔陈新志刘懿
Owner ZHEJIANG UNIV
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