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提出了一种高效的均相催化木糖制备糠醛的方法,探讨了水/二甲基亚砜(DMSO)均相体系中不同类型的无机盐对催化木糖制备糠醛的影响.结果表明,氯盐较硫酸盐和硝酸盐表现出较高的催化活性,其中以SnCl_4的催化效果最高.且它与LiCl复配时催化性能更高.当SnCl_4的摩尔分数为0.8时,催化效果最好,糠醛收率达56.9%.反应条件优化实验发现,当催化剂与木糖的摩尔比为0.5:1,固液比为1:20,水与DMSO体积比为5:5时,于130℃下反应6h,糠醛收率达63%.
An efficient and homogeneous method for the preparation of furfural from xylose was proposed, and the effects of different types of inorganic salts on the xylose production from furfural in water / dimethylsulfoxide (DMSO) homogeneous system were discussed. The results showed that chlorine Compared with sulfate and nitrate, the salt showed higher catalytic activity, of which the catalytic effect of SnCl_4 was the highest, and the catalytic performance was better when it was compounded with LiCl.When the molar fraction of SnCl_4 was 0.8, the catalytic effect was the best, The yield was 56.9% .Experimental results showed that when the molar ratio of catalyst to xylose was 0.5: 1, the solid-liquid ratio was 1:20 and the volume ratio of water to DMSO was 5: 5, the reaction was carried out at 130 ℃ for 6h , Furfural yield of 63%.