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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Ionic Liquid Binary Mixtures, Zeolites, and Ultrasound Irradiation: A Combination to Promote Carbohydrate Conversion into 5-Hydroxymethylfurfural
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Ionic Liquid Binary Mixtures, Zeolites, and Ultrasound Irradiation: A Combination to Promote Carbohydrate Conversion into 5-Hydroxymethylfurfural

机译：离子液体二元混合物，沸石和超声辐照：促进碳水化合物转化成5-羟甲基糠醛的组合

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摘要

The efficient conversion of biomass into value-added compounds under mild and safer conditions is a cornerstone of present research efforts to meet the needs of the chemical industry with sustainable development. In this work, we studied the dehydration of fructose, glucose, and sucrose into 5-hydroxymethylfurfural (5-HMF), catalyzed by Fry zeolite, in three ionic liquid mixtures differing for the cation, aromatic, or aliphatic. We investigated the effect of several operational parameters such as temperature, catalyst loading, zeolite counterion, solvent mixture, and added chloride. In the optimal experimental conditions, we obtained good conversions to 5-HMF especially for fructose and sucrose, 73% and 62%, using the relatively low temperatures of 80 and 120 degrees C, respectively. Interestingly, in the used experimental conditions, the solvent catalyst systems can be reused for at least 6 cycles without loss in performance. We also investigated the dehydration of fructose under sonochemical activation, obtaining a conversion to 5-HMF of 71% in 0.5 h, at the remarkably low temperature of 40 degrees C.
机译：生物质的有效转化为温和和更安全的条件下的增值化合物是满足化学工业需求与可持续发展的基石。在这项工作中，我们研究了果糖，葡萄糖和蔗糖的脱水，进入5-羟甲基糠醛（5-HMF），催化通过沸石催化，三种离子液体混合物不同于阳离子，芳族或脂肪族。我们研究了几种操作参数如温度，催化剂负载，沸石抗衡离子，溶剂混合物和加入氯化物的影响。在最佳实验条件下，我们将良好的转化转化为5-HMF，特别是对于果糖和蔗糖，73％和62％，分别使用相对低的80和120℃的温度。有趣的是，在使用的实验条件下，溶剂催化剂体系可以重复使用至少6个循环，而不会在性能下损失。我们还研究了在多次化学激活下果糖的脱水，在0.5小时内将转化为5-HMF为71％，在40℃的显着低温下。

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