乙酸/磷酸体系水解杨木屑制备糠醛的研究

Furural synthesis from poplar wood by hydrolysis in acetic/phosphoric acids system

以杨木屑为原料,用乙酸/磷酸体系水解制备糠醛。最佳工艺参数为乙酸/磷酸/水体积比3∶8∶100、液固质量比10、反应时间2h、温度160℃,糠醛收率7.6%以上。与传统工艺相比,此法避免了强酸对设备的腐蚀、减少了蒸汽用量、提高了糠醛收率,且易于综合利用废液和醛渣。

The technique of producing furfural from poplar wood by hydrolysis in acetic acid/phosphoric acids system is studied. The optimal conditions are as follows ： the volume ratio of acetic acid, phosphoric acid, and water is 3 ： 8：100 ,with liquid/solid ratio of 10,3 hours of hydrolytic time and 160℃ as the temperature. Under above conditions the yield of furfural can be higher than 7.6%. This method can avoid the corruption caused by strong acids, reduce the steam use,improve the yield of furural, and make the residue and residual liquid utilized more easily, compared with the traditional processes.