以水-1,4-二氧六环为双相体系,催化果糖制取5-羟甲基糠醛,研究催化剂种类、反应时间、反应温度、水相体积、原料与催化剂比例、催化剂循环使用等不同因素对果糖制取5-羟甲基糠醛的影响。结果表明：当采用NaHSO4为催化剂、反应温度为140 ℃、反应时间为1 h时,5-羟甲基糠醛产率达到最高值,为83%。进一步探究以葡萄糖、纤维素为原料制备5-羟甲基糠醛的产率,分别为50%和30%。催化剂经4次重复使用后仍保持良好的催化活性。
Abstract
Taking water-1,4-dioxane as two phase solvent, 5-hydroxymethylfurfural（HMF） is produced by fructose dehydration. The effects of catalyst type, reaction time, reaction temperature, volume of water phase and ratio of raw material to catalyst, catalyst cycling on the preparation of 5-HMF are studied. The results show that the highest yield of HMF is 83% when taking NaHSO4 as catalyst, reaction temperature 140 ℃ and reaction time 1 h. The yield of HMF from glucose and cellulose conversion is 50% and 30%, respectively. After 4 times of reuse, the catalyst still has good catalytic activity.
关键词
果糖 /
脱水 /
双相 /
5-羟甲基糠醛 /
催化剂 /
生物质
Key words
fructose /
dehydration /
two phase /
5-hydroxymethylfurfural /
catalyst /
biomass
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基金
国家重点研发计划项目子课题（2019YFC1905303）; 国家自然科学基金（51976220）; 广东省自然科学基金（2017A030308010）; 中科院洁净能源创新研究院合作基金（DNL180302）
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