均相铜盐催化剂高效转化木糖制糠醛

Highly Efficient Conversion of Xylose to Furfural With Homogeneous Copper Salt Catalyst

利用金属盐为均相催化剂转化木糖制糠醛。通过对催化剂的筛选,发现铜盐是优良的催化剂,其中CuCl_(2)的催化性能最优。研究了反应条件因素对木糖转化的影响,并对体系的循环利用性以及反应机理进行了探讨。结果表明:在1mLγ-戊内酯溶剂中,木糖加入量为50mg,CuCl_(2)用量为木糖物质的量的10%,在150℃反应60 min,木糖转化率为100%,糠醛产率最高可达66%。该体系循环利用性良好。催化剂通过Brönsted和Lewis酸协同作用催化反应的进行。上述研究结果可为秸秆等生物质的高效利用提供有用的参考。

Metal salts were used as homogeneous catalysts to convert xylose to furfural.Copper salts were found to be excellent catalysts,and CuCl_(2) showed the best catalytic performance.The effects of reaction conditions were studied in detail,and the reusability of system and reaction mechanism involved were discussed.The results showed that in 1 mLγ-valerolide solvent with 50 mg of xylose and CuCl_(2)(mole fraction 10%to xylose),xylose conversion was close to 100%and the furfural yield was up to 66%after the reaction at 150℃for 60 min.The catalytic system showed good reusability.The catalyst catalyzed the reaction through the synergistic action of Brönsted and Lewis acids.The above results can provide useful references for the efficient utilization of biomass such as straw and rice husk.