Abstract: It was studied that a steam-explosion way instead of an acid hydrolysis step was used in furfural production process. And the optimal parameters were obtained for the new process. Corn stalk 20 g was treated by steam-explosion under 1.4 MPa pressure and pressure-maintaining time for 4 min. The obtained material was extracted by 60 mL hot water（80 ℃）lasting 2 h. Xylose concentration was 9.96 g/L in the extraction water. The extraction ratio of xylose was 2.79%. The extraction water 350 mL，toluene 30 mL and 5% dilute sulfuric acid 10 mL were mixed and treated by reaction distillation under 165℃ for 3h.The furfural yield was 84%. The total mass yield of furfural was 2.2%. The three waste amounts produced from the said process were decreased largely.

Key words: furfural, xylose, steam-explosion, reaction distillation, two-step process

摘要： 研究了用汽爆法取代糠醛生产工艺中的酸解步骤，得出了新工艺的最佳工艺参数。取玉米秸秆20 g在1.4 MPa压力、维压时间4 min下汽爆，所得物料用60 mL热水（80 ℃）水提2 h，水提液中木糖含量可达9.96 g/L，木糖浸出率为2.79%。取350 mL水提液，加入甲苯30 mL、5%稀硫酸10 mL，于165 ℃反应精馏3 h，糠醛得率可达84%，糠醛总的质量收率为2.2%。结果表明，本工艺产生的三废量大幅减少。

关键词: 糠醛, 木糖, 汽爆, 反应精馏, 二步法