Abstract In this paper, 2,5-furandicarboxylic acid (FDCA) was efficiently prepared by the direct oxidation of 5-hydroxymethylfurfural (5-HMF) using hydrogen peroxide (H2O2) in alkaline conditions without any catalysts. The effects of reaction parameters on the process were systematically investigated and the optimal parameters were obtained as follows: molar ratio of 5-HMF:KOH:H2O2 was 1:4:8, reaction temperature and reaction time were determined as 70°C and 15 minutes, respectively. Under these conditions, the yield of FDCA was 55.6% and the purity of FDCA could reach 99%. Moreover, we have speculated the detailed oxidation mechanism of 5-HMF assisted by hydrogen peroxide in alkaline condition to synthesize FDCA.

中文翻译：

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一种简便有效的过氧化氢直接氧化5-羟甲基糠醛制备2.5-呋喃二甲酸的方法

摘要 在本文中，通过在碱性条件下使用过氧化氢 (H2O2) 直接氧化 5-羟甲基糠醛 (5-HMF)，无需任何催化剂，高效制备 2,5-呋喃二甲酸 (FDCA)。系统考察了反应参数对工艺的影响，得到最佳参数如下：5-HMF:KOH:H2O2的摩尔比为1:4:8，反应温度和反应时间分别确定为70℃和15分钟，分别。在此条件下，FDCA的产率为55.6%，FDCA的纯度可达99%。此外，我们推测了在碱性条件下过氧化氢辅助 5-HMF 合成 FDCA 的详细氧化机制。