College of Chemistry, Jilin University, Changchun, People's Republic of China.
Carbohydr Res. 2012 Mar 1;350:77-80. doi: 10.1016/j.carres.2011.11.023. Epub 2011 Dec 3.
In this paper, the dehydration of xylose to furfural was carried out under atmospheric pressure and at the boiling temperature of a biphasic mixture of toluene and an aqueous solution of xylose, with sulfuric acid as catalyst plus an inorganic salt (NaCl or FeCl(3)) as promoter. The best yield of furfural was 83% under the following conditions: 150 mL of toluene and 10 mL of aqueous solution of 10% xylose (w/w), 10% H(2)SO(4) (w/w), 2.4g NaCl , and heating for 5h. FeCl(3) as promoter was found to be more efficient than NaCl. The addition of DMSO to the aqueous phase in the absence of an inorganic salt was shown to improve the yield of furfural.
本文在甲苯-水两相混合物中，常压、以硫酸为催化剂、添加无机盐（如 NaCl 或 FeCl3）为助催化剂，于沸点温度下使木糖脱水生成糠醛。在 150mL 甲苯和 10mL10%（质量分数）木糖水溶液、10%H2SO4（质量分数）、2.4gNaCl 条件下，加热 5h，糠醛的最高收率可达 83%。与 NaCl 相比，FeCl3 作为助催化剂更为高效。在没有无机盐的水相中添加 DMSO 可提高糠醛的收率。
