Research On The Synthesis Of Function Ionic Liquids And Which Used In Direct Hydroxylation Of Benzene To Phenol

Ionic liquids have been synthesized in sealed pot for the first time. A dramatic reduction ofthe reaction time of3h has been accompanied with high yield of the production, since thereaction temperature could be increased over100℃.The acidity of the ionic liquid have beenstudied by FT-IR with pyridine probe.The synthesized Ionic liquids have been used in direct hydroxylation of benzene to phenolwith H₂O₂as oxidant, while the vanadium substituted HPAs was the catalysts. Differentammonias have been studied in the reaction system, and [（CH₃）4N]4PMo11VO40was the bestcatalyst. The reaction has been carried out in different conditions. The catalyst could be totallyrecovered, and phenol could be separated from the reaction system through extracting byethyl ether.