Qian Jian
2011
Citations
0
Influential Citations
2
Citations
Journal
Chemical Research
Abstract
Ethylene glycol monobutyl ether and acetic acid were used as the starting materials to synthesize 2-butoxyethyl acetate in the presence of ionic liquid 1-methyl-2-pyrrolidinone hydrosulfate as a catalyst.The influence of synthetic conditions such as dosage of catalyst,ratio of acid to alcohol,reaction time and water stripping agent on yield were investigated.The purity of as-synthesized product was determined by gas chromatographic analysis;and its structure was characterized by means of nuclear magnetic resonance spectroscopy and mass spectrometry.Results show that as-synthesized product has a purity of above 99.0%.Ionic liquid 1-methyl-2-pyrrolidinone hydrosulfate exhibits excellent catalytic activity for the synthesis of 2-butoxyethyl acetate.Target product 2-butoxyethyl acetate is obtained at a yield of 94.6% when the dosage of catalyst(vs.total mass of reactants),amount of ethylene glycol monobutyl ether,molar ratio of ethylene glycol monobutyl ether to acetic acid,refluxing time,and dosage of cyclohexane are kept as 6%,11.8 g,1∶2,3 h,and 15 mL,respectively.Besides,the catalyst can be reused for five times without significant loss in yield.