汽爆法生产糠醛新工艺  

Study on a new furfural preparation process based on steam-explosion way

作　　者：李志松[1] 朱斌[2] 

机构地区：[1]湖南化工职业技术学院化学工程系,湖南株洲412004 [2]华南理工大学分析测试中心,广东广州510640

出　　处：《化工进展》2012年第5期1109-1112,1129,共5页Chemical Industry and Engineering Progress

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9.96g/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。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. Com 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.

关 键 词：糠醛 木糖 汽爆 反应精馏 二步法 

分 类 号：TQ353[化学工程]