氯化铝催化葡萄糖制备5-羟甲基糠醛——助催化剂的作用

摘要

The effect of bi - promoters on preparation of 5 - hydroxymethyl furfural(5 - HMF)from glu-cose catalyzed by AlCl3 was studied. The influence of the types and dosages of the promoters was investi-gated,and the reaction conditions were also optimized. The results showed that using double promoters of NH4 Br - NaBr,the yield of 5 - HMF increased remarkably. Under the condition of 0. 08 mol·L - 1 NH 4 Br -0. 32 mol·L - 1 NaBr,reaction temperature 100 ℃,reaction time 60 min,the yield of 5 - HMF was up to 54%,which was 21 percent point higher than that over single AlCl 3 catalyst.%研究双助催化剂对AlCl 3催化葡萄糖转化制备5-羟甲基糠醛的促进作用,考察助催化剂种类和用量对反应的影响,并优化反应条件.结果表明,NH 4 Br-NaBr双助催化剂体系对该反应的促进作用最显著,助催化剂NH 4 Br用量为0.08 mol·L-1和NaBr用量为0.32 mol·L-1时,100℃反应60 min,5-羟甲基糠醛收率为54%,比单一AlCl 3作催化剂时提高21个百分点.