Immobilized oxo-vanadium Schiff base on graphene oxide as an efficient and recyclable catalyst for the epoxidation of fatty acids and esters
摘要:
以 3-aminopropyltriethoxysilane 为耦合剂,将氧化钒席夫碱共价固定在化学功能化的氧化石墨烯(GO)上。傅立叶变换红外光谱(FTIR)、X射线衍射(XRD)、热重分析(TGA)和电感耦合等离子体原子发射光谱(ICP-AES)证实了钒席夫碱在 GO 纳米片上的负载。研究发现,合成的异相催化剂在以叔丁基过氧化氢(TBHP)为氧化剂进行脂肪酸和酯的环氧化反应时具有高效性和选择性。有趣的是,与均相乙酰丙酮酸香草酯相比,固定化催化剂显示出更高的催化效率。循环实验结果表明,该催化剂具有很高的稳定性,即使在使用六个循环后仍能保持很高的活性和选择性。
Industrial resin “INDION 130” modified with vanadyl cations as highly efficient heterogeneous catalyst for epoxidation of fatty compounds with TBHP as oxidant
作者:Praveen K. Khatri、Mounika Aila、Jyoti Porwal、Savita Kaul、Suman L. Jain
DOI:10.1039/c5nj00744e
日期:——
Industrial grade cation-exchange resin “INDION 130” was modified with vanadyl cations by an ion-exchange method and then used for the epoxidation of unsaturated fatty materials including acids, esters and vegetable oils using tert-butyl hydroperoxide (TBHP) in decane as oxidant. The effect of oxidant/double bond ratio, catalyst concentration, recycling of the catalyst and temperature on the conversion