Protic ionic liquids from di- or triamines: even cheaper Brønsted acidic catalysts
作者:Alina Brzęczek-Szafran、Justyna Więcławik、Natalia Barteczko、Anna Szelwicka、Emily Byrne、Anna Kolanowska、Małgorzata Swadźba Kwaśny、Anna Chrobok
DOI:10.1039/d1gc00515d
日期:——
Dicationic and tricationic ionic liquids, synthesised by proton transfer from sulfuric acid and corresponding di- and triamines, were characterised and used as Brønsted acidic catalysts in biodiesel production. It has been demonstrated that the new ionic liquids are less expensive than those based on monoamines (even on triethylamine) and are highly acidic. Their performance in a model catalytic esterification
通过质子转移从硫酸和相应的二胺和三胺合成的二阳离子和三阳离子离子液体,进行了表征,并用作生物柴油生产中的布朗斯台德酸性催化剂。已经证明,新的离子液体比基于单胺(甚至基于三乙胺)的离子液体便宜,并且是高度酸性的。在离子催化酯化反应模型中,它们的性能超过了硫酸和其他文献报道,这是由于离子液体具有在相分离酯的同时吸收水的能力,从而使反应平衡向产物转移。总体催化性能是酸度(由Gutmann AN量化)与物理性质之间的相互作用:密度和粘度,可轻松地进行相分离,从而从酯中分离出水。