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_1.5PW₁₂O₄₀) 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 CO₂ 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 H₂O₂ in the presence of CO₂ is an efficient oxidant system for the production of 1.2 cyclohexane diol over carbon activated carbon supported Co_1.5PW₁₂O₄₀. Thanks to CO₂ 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.

邻苯二甲酸是化学药品和药物的重要组成部分。目前，它们是使用溶剂和有害氧化剂从烯烃生产的，从环境和经济的角度来看这些溶剂和有害氧化剂是不利的。该工作在于通过绿色途径由环己烯合成1,2-环己二醇。为此，制备了一系列负载在不同含量的活性炭上的钴-Keggin杂多钴盐（Co _1.5 PW ₁₂ O ₄₀），表征并测试了二醇的合成。反应温度，反应时间和CO ₂等各种参数的影响研究了反应压力。反应温度在60-80°C范围内的影响表明，高温有利于二醇的形成，而低温有利于环己酮，并且观察到分段的凹面Arrhenius图。这项工作的结果表明，在CO ₂的存在下，H ₂ O _2的氧化是一种在活性炭负载的Co _1.5 PW ₁₂ O _40上生产1.2环己烷二醇的有效氧化剂体系。多亏了CO ₂作为软氧化剂，得到96.9％的转化率和在1，2环己烷二醇中的选择性为64.2％。这种简单，安全且环保的方法可能是从烯烃生产邻苯二甲酸的另一种绿色途径。