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Application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and photocatalytic olefin isomerization method

A technology of tungsten trioxide and oxygen deficiency, which is used in isomerization to produce hydrocarbons, metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, etc. It can improve the light-capturing ability, improve the efficiency, and improve the activity.

Active Publication Date: 2022-03-29
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of the existing photocatalytic olefin isomerization reaction substrates with small application range, poor reaction selectivity and low solar energy utilization efficiency

Method used

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  • Application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and photocatalytic olefin isomerization method
  • Application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and photocatalytic olefin isomerization method
  • Application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and photocatalytic olefin isomerization method

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Experimental program
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Embodiment 1

[0021] A photocatalytic olefin isomerization method, comprising the following steps in sequence:

[0022] 1) Add 0.2g of oxygen-deficient tungsten trioxide and 1mmol of olefin into 10ml of cyclohexane and stir evenly;

[0023] 2) Under the reaction conditions of normal pressure and 70°C, under argon protection, irradiate with 625nm red light for 36h.

[0024] figure 1 It is the reaction formula of Example 1. It can be seen that after the reaction, the C=C double bond moves from the end to the middle, that is, a new C=C double bond is formed.

Embodiment 2

[0026] A photocatalytic olefin isomerization method, comprising the following steps in sequence:

[0027] 1) Add 0.05g of oxygen-deficient tungsten trioxide and 0.5mmol of olefin into 5ml of cyclohexane and stir well;

[0028] 2) Under the reaction conditions of normal pressure and 40°C, under the protection of helium, irradiate with 390nm purple light for 20h.

Embodiment 3

[0030] A photocatalytic olefin isomerization method, comprising the following steps in sequence:

[0031] 1) Add 0.1g of oxygen-deficient tungsten trioxide and 0.25mmol of olefin into 2.5ml of cyclohexane and stir evenly;

[0032] 2) Under the reaction conditions of normal pressure and 50°C, under the protection of xenon gas, irradiate with 550nm green light for 6h.

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Abstract

The invention relates to the technical field of photocatalytic olefin isomerization, specifically the application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and a photocatalytic olefin isomerization method, aiming to solve the problem of existing photocatalytic olefin isomerization However, there are technical problems such as small scope of application of chemical reaction substrates, poor reaction selectivity and low efficiency of solar energy utilization. The following technical scheme is adopted: the application of oxygen-deficient tungsten trioxide as a photocatalyst in photocatalytic olefin isomerization; a method for photocatalytic olefin isomerization, which is characterized in that it includes the following steps in sequence: 1), adding 0.05g- Add 0.25g oxygen-deficient tungsten trioxide and 0.25mmol-1.25mmol olefin into 2.5ml-12.5ml cyclohexane and stir evenly; 2) Under normal pressure, 40°C-70°C reaction conditions, inert gas protection, using 390nm-700nm light irradiation for 6-36h.

Description

technical field [0001] The invention relates to the technical field of photocatalytic olefin isomerization, in particular to the application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and a photocatalytic olefin isomerization method. Background technique [0002] Olefin isomerization can be used to construct new C=C double bonds, which are widely used in the synthesis of pharmaceuticals, high-strength materials and fine chemicals. Traditional olefin isomerization is carried out with alkali, which has the problems of equipment corrosion and excessive by-products. These problems can be avoided by using solid bases, but the activity and selectivity of solid bases to catalyze olefin isomerization are poor. Transition metal catalysts can effectively catalyze olefin isomerization, but they often face high cost and reuse problems. In recent years, photocatalytic organic synthesis has been considered as a promising approach to address environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/25B01J23/30C07C11/02
CPCC07C5/2512B01J35/004B01J23/30C07C2523/30C07C11/02
Inventor 郑占丰朱鹏琪王云伟
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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