Method for synthesizing cyclohexanone by accelerating hydrogenation of aromatic compounds with carbon dioxide
A technology of aromatic compounds and carbon dioxide, which is applied in the synthesis field of aromatic compounds to synthesize cyclohexanone, can solve the problems of low conversion rate, complex products, harsh reaction conditions, etc., and achieve the effect of alleviating environmental problems, simple process operation, green and safe cost
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[0039] Example 1
[0040] The catalyst used in this example was commercial 10% Pd / C.
[0041] Reaction steps: 10 mg of 10% Pd / C catalyst and 0.25 mmol of nitrobenzene were accurately weighed into the reaction flask, and then 5 mL of water was added as a solvent. and filled with CO through the air bag 2 and H 2(molar ratio is 1:3), add CO 2 and H 2 The post-reaction pressure is 0.1 MPa, the reaction temperature is 35° C., and the yield of the final product cyclohexanone can reach 90% after 6 hours of reaction.
[0042] figure 1 for the ligand CO in the gas phase 2 A reaction pathway for the hydrogenation of nitrobenzene to produce cyclohexanone by palladium nanoparticles catalyzed by the gas-phase ligand CO 2 With the help of Pd / C catalyst and under the action of Pd / C catalyst, the nitro group in nitrobenzene is reduced to amine group to generate aniline, and then the benzene ring in aniline undergoes hydrogenation reaction and is hydrolyzed with the help of water to rem...
Example Embodiment
[0046] Example 2
[0047] The catalyst used in this example was commercial 10% Pd / C.
[0048] Accurately weigh 10 mg of 10% Pd / C catalyst and 0.25 mmol of aniline into the reaction flask, and then add 5 mL of water as a solvent. and filled with CO through the air bag 2 and H 2 (molar ratio is 1:3), add CO 2 and H 2 The post-reaction pressure is 0.1 MPa, the reaction temperature is 35° C., and the yield of the final product cyclohexanone can reach 28% after 6 hours of reaction.
Example Embodiment
[0049] Example 3
[0050] The catalyst used in this example was commercial 10% Pd / C.
[0051] Accurately weigh 10 mg of 10% Pd / C catalyst and 0.25 mmol of N-methylaniline into the reaction flask, and then add 5 mL of water as a solvent. and filled with CO through the air bag 2 and H 2 (molar ratio is 1:3), add CO 2 and H 2 The post-reaction pressure is 0.1 MPa, the reaction temperature is 35° C., and the yield of the final product can reach 99% after 6 hours of reaction.
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