木糖制备糠醛的工艺  

Technology of Furfural Production from Xylose

作　　者：李凭力[1] 李加波[1] 解利昕[1] 保成琼 常贺英[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]中国石油华北石化公司,河北任丘062552

出　　处：《化学工业与工程》2007年第6期525-527,共3页Chemical Industry and Engineering

摘　　要：利用高压反应釜,以工业级纯木糖水溶液为原料,醋酸为催化剂对木糖脱水生成糠醛的间歇水解工艺条件进行了研究。考察了催化剂浓度、温度和木糖溶液初始浓度对糠醛收率的影响。在一定木糖初始浓度和醋酸浓度下糠醛收率先随着温度的升高而增加,达到一个极大值后温度升高收率下降;在不同催化剂浓度下,糠醛收率均在反应温度180℃时达到极大值;在反应温度和木糖初始浓度相同时,糠醛收率随醋酸浓度增加呈显先增加后降低的变化趋势;在反应温度和醋酸浓度相同条件下,糠醛最大收率与木糖初始浓度有关。最佳反应条件下木糖脱水环化生成糠醛的收率可达80%。Furfural was produced from xylose solution by hydrolization reaction with acetic acid as catalyst in the autoclave intermittently. The effect of several variables such as temperature, concentration of acetic acid and initial concentration of xylose on furfural yield was studied. When initial concentration of xylose was constant, furfural yield increased with the increasing of temperature, and then decreased when the temperature was above 180 ℃ for different concentrations of acetic acid. At given initial concentration of xylose and temperature, furfural yield can firstly increase and then decrease with the increasing of the concentration of acetic acid. And when temperature and concentration of acetic acid were fixed, the maximum of furfural yield was affected by initial concentration of xylose. Furfural yield can reach 80% by optimizing reaction variables.

关 键 词：木糖 糠醛 醋酸 水解反应 

分 类 号：TQ251.11[化学工程—有机化工]