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

A technology for olefin isomerization and tungsten trioxide, which is used in isomerization to produce hydrocarbons, metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, etc. Problems such as poor reaction selectivity, to achieve the effect of improving light harvesting ability, improving efficiency, and improving activity

Active Publication Date: 2021-06-15
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of the existing photocatalytic olefin isomerization

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] 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.

Example Embodiment

[0025] Example 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.

Example Embodiment

[0029] 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, in particular to application of oxygen-deficient tungsten trioxide in photocatalytic olefin isomerization and a photocatalytic olefin isomerization method, and aims at solving the technical problems that: existing photocatalytic olefin isomerization reaction substrates are small in application range, poor in reaction selectivity and low in solar energy utilization efficiency. According to the technical scheme, oxygen-deficient tungsten trioxide is used as a photocatalyst to be applied to photocatalytic olefin isomerization; The photocatalytic olefin isomerization method is characterized by sequentially comprising the following steps: 1) adding 0.05-0.25 g of oxygen-deficient tungsten trioxide and 0.25-1.25 mmol of olefin into 2.5-12.5 ml of cyclohexane, and performing uniform stirring; and 2) under the reaction conditions of normal pressure, 40-70 DEG C and inert gas protection, performing irradiating with light of 390-700 nm for 6-36 hours.

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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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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