| 引用本文： |
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李秉正,吴学众.乙醇中镧盐催化果糖脱水制备5-羟甲基糠醛的研究[J].广西科学,2011,18(2):158-160,168. [点击复制]
- LI Bing-zheng,WU Xue-zhong.Catalytic Dehydration of Fructose to 5-hydroxymethylfurfural by Lanthanum Salt in Ethanol[J].Guangxi Sciences,2011,18(2):158-160,168. [点击复制]
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| 摘要: |
| 以乙醇为反应溶剂,镧盐为催化剂催化果糖制备5-羟甲基糠醛(5-HMF)进行了初步研究。乙醇作为反应溶剂时,5-HMF产率远高于以水作为反应溶剂。氯化镧与硝酸镧相比具有更好的催化活性。提高催化剂浓度可以增大果糖转化为5-HMF的速率,但是对5-HMF的最大产率影响较小。随着反应温度的提高,果糖转化为5-HMF的速率增大,5-HMF的产率也明显提高。当反应温度为140℃时,反应20min产率即可达到41.6%。 |
| 关键词: 5-羟甲基糠醛 催化脱水 乙醇 氯化镧 |
| DOI： |
| 投稿时间：2010-12-16修订日期：2011-01-14 |
| 基金项目:广西自然科学基金项目(编号:桂科自0991006Z);广西科学院基金项目(编号:08YJ16SW0110YJ25SW03)资助 |
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| Catalytic Dehydration of Fructose to 5-hydroxymethylfurfural by Lanthanum Salt in Ethanol |
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LI Bing-zheng, WU Xue-zhong
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| (State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China) |
| Abstract: |
| A preliminary study of catalytic dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) was carried out by using ethanol as solvent and lanthanum salt as catalyst.A comparison study indicated that the yields of 5-HMF in ethanol was much larger than those in water.LaCl3 had higher catalytic activity than La (NO3)3.Increasing the catalyst concentration can accelerate the reaction of dehydration of fructose to 5-HMF, but had little effect on increasing the maximum yield of 5-HMF.The yield of 5-HMF, as well as the reaction rate of dehydration of fructose to 5-HMF, increased along with the increase in temperature.The yield of 5-HMF up to 41.6% was achieved after 20 min at 140℃. |
| Key words: 5-hydroxymethylfurfural catalytic dehydration ethanol lanthanum chloride |
