Application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene

A phenol and visible light technology, applied in the field of photocatalysis, can solve problems such as aggravating environmental pollution and huge energy consumption, and achieve the effects of saving energy consumption, simple and easy experimental operation methods, and being conducive to large-scale promotion.

Inactive Publication Date: 2015-08-19
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only requires huge energy consumption, such as the con...

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  • Application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene
  • Application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene
  • Application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene

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Embodiment 1

[0017] Preparation of MIL-100(Fe) Photocatalyst

[0018] Fe(NO 3 ) 3 9H 2 O, H 3 Add 5mL H to BTC 2 O, stirred for 10-15min to obtain a suspended mixed solution, which was transferred to a 100mL hydrothermal kettle, and reacted at 160-180°C for 12h. The solid was obtained by filtration, washed and dried. figure 1 The X-ray diffraction (XRD) pattern of the visible light catalyst MIL-100(Fe) of the present invention is shown, and it can be found from the figure that the prepared MIL-100(Fe) is a pure phase. figure 2 The ultraviolet-visible diffuse reflectance diagram of the visible light catalyst MIL-100(Fe) of the present invention is shown. It can be seen from the figure that the absorption band edge of MIL-100(Fe) extends to 600nm, which can effectively absorb visible light.

Embodiment 2

[0020] Hydroxylation of Benzene to Phenol Using MIL-100(Fe) Photocatalyst

[0021] The prepared Fe-based metal-organic framework material MIL-100(Fe) was used as a photocatalyst to hydroxylate benzene. Weighed 10 mg of the catalyst and added 2 mL of acetonitrile, 2 mL of water, and 44 μL of benzene, and then added 42 μL of H 2 o 2 (30wt%). Then the light source was turned on for photocatalytic reaction, and the product was detected by gas chromatography. The light source used in the experiment is a 300 W xenon lamp, and a filter is used to ensure that the incident light is visible light (420 nm image 3 As shown, it can be seen from the figure that when there is a catalyst, the conversion rate of benzene reaches 20.1% after 8 hours of light irradiation (curve a), and the conversion rate of benzene remains basically unchanged after filtering the catalyst after 4 hours of photocatalytic reaction (curve b). , while under the condition of no catalyst or no light, the conversion ...

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Abstract

The present invention discloses application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene, and belongs to the field of photocatalytic technologies. MIL-100 (Fe) is a metal-organic framework material containing the Fe element that is high in abundance in the earth crust. According to the present invention, MIL-100 (Fe) is applied for the first time as a photocatalyst to preparation of phenol through hydroxylation of benzene; and the problems of high energy consumption, low selectivity and production of byproducts same in molar volume with the produced phenol in a three-step-method for phenol synthesization in the prior art are solved. The application of MIL-100 (Fe) in preparation of phenol through photocatalytic hydroxylation of benzene is simple in process, low in cost, and capable of meeting the practical production demands, and has a relatively great potential for application.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a Fe-based metal-organic framework material MIL-100 (Fe). 2 o 2 It is used in the production of phenol by the hydroxylation of benzene under the excitation of oxidants and visible light. Background technique [0002] Phenol is an important chemical intermediate with a wide range of uses. In the 21st century, with the continuous acceleration of industrialization and modernization, the consumption of phenol has also increased sharply. However, the current industrial production of phenol is seriously insufficient to meet the growing demand. Industrial production is mainly based on the cumene method, through three-step synthesis of phenol. This method has the advantages of cheap raw materials, but it is accompanied by the disadvantages of serious pollution, large energy consumption and almost equimolar by-products. Therefore, in order to solve these shortcom...

Claims

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Application Information

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IPC IPC(8): C07C39/04C07C37/60B01J31/22
CPCY02P20/52C07C37/60B01J31/223B01J2231/70B01J2531/0238B01J2531/842C07C39/04
Inventor 李朝晖王登科
Owner FUZHOU UNIV
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