离子液体[bmim]BF4的制备

Room temperature ionic liquids have been widely studied as new types of environmentally friendly reaction media, owing to their unique physicochemical properties . In this paper, Ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) was synthesized through two step method under microwave irradiation using N-methylimidazole, 1- bromobutane, Sodium fluoroborate as starting materials, and the experiments were mainly examined the effects of reaction methods, reaction time and reaction solvents on the synthesis of [bmim]BF4 in the second step. The results showed that [bmim]BF4 was synthesized effectively by the microwave synthesis method.The optimum synthetic conditions of the target product [bmim]BF4 were obtained as follows: reaction time was 30mim，reaction solvents was acetone . The target product was characterized by IR.