摘要
以二甲亚砜做溶剂,用改性的732阳离子交换树脂为催化剂,以葡萄糖为原料,制备了5-羟甲基糠醛(5-HMF)。考察了改性离子种类、催化剂用量、葡萄糖浓度、反应温度、反应时间等因素对葡萄糖转化5-羟甲基糠醛的影响,用高效液相色谱对产物中5-羟甲基糠醛的含量进行分析。结果表明:在相同条件下,Sn2+改性后的阳离子交换树脂的催化活性最高。反应温度为160℃,催化剂、葡萄糖、溶剂的质量比为1∶5∶10,反应时间4 h,5-羟甲基糠醛的收率最高,可达到46.6%。
The preparation of 5-hydromethylfurfural(5-HMF) from glucose catalyzed by modified 732 cation exchange resin was studied with dimethyl sulfoxide as solvent. The effect of the type of cation, catalyst dosage, glucose concentration, reaction temperature and reaction time on the synthesis of 5-HMF by catalytic conversion of glucose was investigated. High-performance liquid chromatography(HPLC) was used to analyze the concentration of 5-HMF in reaction product. It was found that 732 cation exchange resin modified by Sn2+ ions exhibited higher catalytic activity than that modified by other cations. The optimum conditions were determined as followed: the reaction temperature 160 ℃; the mass ratio of catalyst to glucose to solvent 1:5:10; the reaction time 4 h. The yield of 5-HMF was as high as 46.6% under the optimum condition.
引文
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