Abstract

Polyethylene terephthalate (PET) is the third-largest globally produced polymer, and many efforts have been made to replace PET with a renewable polymer. One renewable alternative to PET is polyethylene furanoate (PEF), which is prepared using 2,5-furan dicarboxylic acid (FDCA) as a precursor instead of terephthalic acid (TPA). Biomass-derived hydroxymethyl-2-furfural (HMF) can be converted to 2,5-furan dicarboxylic acid (FDCA) through multiple oxidation reactions. Metal oxide-supported Ru catalyst prepared by simple methods for the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA) in the absence of a base under aqueous conditions is reported. This study clearly explains that the nature of basicity of the support has an important role on the selective oxidation of HMF to FDCA. Among the various materials studied magnesium oxide (MgO)-supported Ru catalyst afforded a 100% HMF conversion and more than 90% FDCA yield with 90 psi of \(\hbox {O}_{2}\) at 160 \({^{\circ }}\hbox {C}\) in 4 h and it could be used 5 times without a significant drop of FDCA yields.

SYNOPSIS

Metal oxide-supported Ru catalyst prepared by simple methods for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-Furan dicarboxylic acid (FDCA) in the absence of a base under aqueous conditions are reported. Magnesium oxide (MgO)-supported Ru catalyst afforded a 100% HMF conversion and more than 90% FDCA yield.

中文翻译：

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在碱性金属氧化物负载的钌催化剂上，在水性条件下，将5-羟甲基-2-糠醛无碱氧化为2,5-呋喃二羧酸

摘要

聚对苯二甲酸乙二酯（PET）是全球生产的第三大聚合物，已经做出了许多努力来用可再生聚合物代替PET。PET的一种可再生替代品是呋喃甲酸乙烯酯（PEF），它是使用2，5-呋喃二羧酸（FDCA）代替对苯二甲酸（TPA）作为前体制备的。生物质衍生的羟甲基-2-糠醛（HMF）可通过多次氧化反应转化为2,5-呋喃二羧酸（FDCA）。据报道，在水性条件下，在不存在碱的情况下，通过简单的方法制备的金属氧化物负载的Ru催化剂可通过简单的方法将5-羟甲基糠醛（HMF）氧化为2,5-呋喃二羧酸（FDCA）。这项研究清楚地说明，支持物碱性的性质对于将HMF选择性氧化为FDCA具有重要作用。在4小时内\（\ hbox {O} _ {2} \）的psi在160 \（{^ {\ circ}} \ hbox {C} \）的情况下可以使用5次，而FDCA产量没有明显下降。

概要

报道了在水性条件下在不存在碱的情况下通过简单的方法制备的金属氧化物负载的Ru催化剂，其用于将5-羟基甲基糠醛（HMF）氧化为2,5-呋喃二羧酸（FDCA）。氧化镁（MgO）负载的Ru催化剂可实现100％的HMF转化率和90％以上的FDCA收率。