磁性固体酸催化制备高羟值植物油基多元醇

Magnetic solid acid catalyst in preparation of high hydroxyl vegetable oil-based polyols

以ZrOCl2·8H2O和纳米Fe3O4为原料,用共沉淀法制备了ZrO2/Fe3O4载体,并以浸渍法将SO42–负载于ZrO2/Fe3O4载体上作为活性中心,制得SO42–/ZrO2/Fe3O4催化剂。利用FTIR、EDS、XRD等对催化剂的组成、结构、表面酸性、磁性能进行了表征。将此磁性固体酸催化剂应用于甘油作为开环剂的环氧大豆油制备多元醇反应体系中,考察了催化剂用量、温度、反应时间等对开环转化率及产物羟值的影响。结果表明,最佳反应条件为:催化剂用量为环氧大豆油质量的1%,反应温度80℃,反应时间6 h。在该条件下环氧大豆油开环转化率达99%,产物羟值达365 mg KOH/g。

ZrO2/Fe3O4 carrier was prepared by co-precipitation method from zirconium oxychloride octahydrate and Fe3O4 nanoparticles. SO42–/ZrO2/Fe3O4 catalyst was prepared by impregnating SO42– as active centeron ZrO2/Fe3O4 carrier. The composition, structure, surface acidity and magnetic properties of the catalyst were characterized by FTIR, EDS and XRD techniques. SO42–/ZrO2/Fe3O4 was used as catalyst for the preparation of polyols from epoxidized soybean oil with glycerol as ring opening agent. The effects of catalyst dosage, temperature and reaction time on ring-opening conversion and product hydroxyl value were investigated. The results showed that the optimal reaction conditions were obtained. Under the conditions of catalyst dosage 1% of the mass of epoxidized soybean oil, reaction temperature 80 ℃ and reaction time 6 h, the ring-open conversion was 99%, and the product hydroxyl value was 365 mg KOH/g.