The invention relates to a class of novel Brønsted acidic ionic liquids each having a lactam cation, and to a method for preparing the same through simple neutralization reaction of a lactam, which is available in large scale from industry, with a Brønsted inorganic or organic acid under room temperature. The properties of the lactam Brønsted acidic ionic liquids are as follows: they are water- and moisture-stable; they are more environmentally benign and lower cost than that of dialkylimidazolium salts; they have stronger Brønsted acidity and can be used as acidic catalysts and media instead of inorganic corrosive acids, such as concentrated sulfuric acid and hydrofluoric acid, in many acid-catalyzed reactions; and they can also be used as green media for extraction and separation.
该发明涉及一类新型的Brønsted酸性
离子液体,每种液体都具有一种内酰胺阳离子,并且通过将一种内酰胺与Brønsted
无机酸或有机酸在室温下进行简单的中和反应来制备这种
离子液体的方法。内酰胺Brønsted酸性
离子液体的特性如下:它们具有耐
水和耐
潮湿的特性;它们比二烷基
咪唑盐更环保且成本更低;它们具有更强的Brønsted酸性,可以用作酸性催化剂和介质,取代许多酸催化反应中的无机腐蚀性酸,如浓
硫酸和
氢氟酸;它们还可以用作萃取和分离的绿色介质。