乙酰丙酸丁酯(BL)是一种具有多种用途的生物质基化学品。研究了以硫酸铁为廉价催化剂催化糠醇(FA)生成BL的过程。首先采用响应面分析的方法,优化了FA的转化过程。在优化的反应条件下,BL的平均产率达到了86.7%。进一步加入甲苯能够使BL的产率达到90.7%。此外,催化剂重复性实验表明硫酸铁易于回收,重复3次以上仍具有较高的催化活性,并利用红外光谱与X射线衍射对催化剂进行了结构表征。进一步考察了反应液相产物分布与反应物料平衡,并在此基础上,提出了由FA生成BL的可能的反应路径。
Butyl levulinate is an important bio-based chemicals with diverse industrial applications. A single step conversion ofbio-based furfuryl alcohol to butyl levulinate was investigated with ferric sulfate as catalyst. Process optimization of furfural alcohol conversion was conducted by response surface methodology with 86.7% average yield of butyl levulinate obtained under optimum conditions. Adding toluene further improved butyl levulinate yield to 90.7%. Reusability study showed that ferric sulfate was easily recycled and could maintain high catalytic activity after used more than three times. Structures of fresh and recycled catalysts were characterized by FT-IR and XRD. Composition analysis of liquid products and calculation of process mass balance elucidated possible reaction pathway for butyl levulinate production form furfuryl alcohol.