酸性树脂催化1,4-丁烯二醇制备2,5-二氢呋喃

Synthesis of 2,5-Dihydrofuran from 2-Butene-1,4-diol with Acidic Resin Catalyst

提出1,4-丁烯二醇在酸性条件下脱水关环制备2,5-二氢呋喃的反应机理。实验对照了磺酸基树脂D61、D72以及膦酸基树脂LSC-500的催化性能,在5小时的反应过程中,它们的催化活性均逐渐下降,其中D61活性最强,平均每克催化剂1小时转化2.96克1,4-丁烯二醇,D61和D72的收率逐渐下降,LSC-500的收率最高而且比较稳定,保持在80%以上。

The reaction mechanism for synthesis of 2,5-dihydrofuran by the ring closing reaction of 2-butene-1,4-diol using acidic resin as catalyst was studied.The catalytic activities of sulfonic acid resin D61,D72 and phosphonic acid resin LSC-500 were observed.The D61 conducted highest activity.2.96 g 2-Dutene-1,4-diol was transformed in an hour with 1 g D61.Experimental results showed that their activities reduced in 5 hours,and the yields of the reactions using D61 and D72 droped,which using LSC-500 beyond 80% kept high and stable.