Activated carbon supported Co 1.5 PW 12 O 40 as efficient catalyst for the production of 1, 2 cyclohexane diol by oxidation of cyclohexene with H 2 O 2 in the presence of CO 2

Green Chemistry Letters and Reviews

article

Ramyah Radman¹  Ahmed Aouissi¹  Abdullah A. Al-Kahtani¹  Wafa K. Mekhamer¹  A. Yacine Badjah Hadj Ahmed¹ 

[1] Chemistry Department, College of Science, King Saud University

关键词: Cyclohexene dihydroxylation;    carbon dioxide;    hydrogen peroxide;    polyoxometalates;    activated carbon;   

DOI  :  10.1080/17518253.2020.1813811

学科分类：化学（综合）

来源: Taylor & Francis

【 摘 要 】

Vicinal diols are important building blocks for chemicals and pharmaceuticals. Currently, they are produced from olefins using solvents and harmful oxidants unfavorable from an environmental and economic point of view. This work lies on the synthesis of 1,2 cyclohexane diol from cyclohexene by a green route. To achieve it, a series of Cobalt Keggin heteropolyanion salt (Co 1.5 PW 12 O 40 ) loaded on activated carbon with different contents was prepared, characterized and tested for the synthesis of diol. The effect of various parameters such as reaction temperature, reaction time and CO 2 pressure on the reaction was studied. The effect of reaction temperature in the range 60-80 °C showed that high temperatures favor diol formation while low temperatures favor cyclohexanone and a segmented concave Arrhenius graph was observed. The results of this work showed that oxidation by H 2 O 2 in the presence of CO 2 is an efficient oxidant system for the production of 1.2 cyclohexane diol over carbon activated carbon supported Co 1.5 PW 12 O 40 . Thanks to CO 2 as a soft oxidizing agent, a conversion of 96.9% and a selectivity in 1, 2 cyclohexane diol of 64.2% was obtained. This simple, safe and environmentally method could be an alternative green route for vicinal diols production from alkenes.

【 授权许可】

CC BY|CC BY-NC