A new type magnetic solid acid catalyst (Fe₃O₄@ETMS-TETA-SO₃H) was prepared and applied in the alcoholysis of dioscin from Dioscorea Zingiberensis C.H.Wrigh to obtain diosgenin for the first time. The solid acid was characterized by FTIR, TGA, TEM, SEM, EDS-mapping, XRD, VSM and XPS, respectively. The results showed that the magnetic solid acid has good stability and can be recovered after 5 runs with little mass loss. The most innovative point is that its extraction activity is 8.8% higher than that of equivalent quality H₂SO₄. This work provided a potential clean production approach for extraction diosgenin from biomass.

制备了一种新型磁性固体酸催化剂（Fe ₃ O ₄ @ ETMS-TETA-SO ₃ H），并将其应用于薯Di薯Di中薯di皂苷的醇解中，首次获得薯os皂苷元。分别通过FTIR，TGA，TEM，SEM，EDS映射，XRD，VSM和XPS对固体酸进行了表征。结果表明，磁性固体酸具有良好的稳定性，经过5次运行即可回收，质量损失很小。最具创新性的一点是，其提取活性比同等质量的H ₂ SO ₄高8.8％。这项工作为从生物质中提取薯os皂苷元提供了一种潜在的清洁生产方法。