A simple, sustainable, one-pot, and highly efficient protocol for the synthesis of 5-hydroxymethyl furfural (5-HMF) and furfural from waste papers, cotton, poly/mono-meric carbohydrates using a hydrothermal reactor system has been demonstrated. The synergetic role of oxalic acid and LiCl was investigated for the conversion of different types of waste paper such as cardboard, newspaper, tissue paper, white paper, and cotton in a greener solvent media THF-water to 5-HMF and furfural production. Moreover, the influence of reaction time, temperature, oxalic acid and LiCl concentrations, and the impact of different solvents were critically examined to procure 27–79 and 39–62 mol% yields of 5-HMF and furfural respectively. This study also elucidates the relative compositions of various waste paper/cotton, and the quantification of desired products were determined through the ultra-performance liquid chromatography (UPLC) analysis technique with 85–95% products purity.

中文翻译：

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5-羟甲基糠醛以及从废纸、棉花和多聚/单体碳水化合物中合成糠醛


已经证明了一种简单、可持续、一锅法、高效的方案，用于使用水热反应器系统从废纸、棉花、多聚/单体碳水化合物合成 5-羟甲基糠醛 (5-HMF) 和糠醛。研究了草酸和 LiCl 在更环保的溶剂介质 THF-水中将不同类型的废纸（例如纸板、报纸、薄纸、白纸和棉花）转化为 5-HMF 和糠醛生产的协同作用。此外，还严格考察了反应时间、温度、草酸和氯化锂浓度的影响以及不同溶剂的影响，分别获得了 27-79 mol% 和 39-62 mol% 的 5-HMF 和糠醛收率。这项研究还阐明了各种废纸/棉花的相对成分，并通过超高效液相色谱 (UPLC) 分析技术确定了所需产品的定量，产品纯度为 85-95%。