中文摘要：

测定了常压下甲基丙烯醛、甲醇与[BMIM]BF4二元体系在350．75，341．55和331．55K下的气液相平衡数据，并采用非无序双液（Non—random Tow—liquid Model，NRTL）模型对实验数据进行了关联、实验结果表明，甲基丙烯醛和甲醇在离子液体[BMIM]BF4中的溶解度均随温度的升高而减小，随压力的升高而增大；甲基丙烯醛-[BMIM]BF4体系相对于理想溶液产生正偏差，甲醇-[BMIMJBF4体系相对于理想溶液产生负偏差．NRTL模型的关联结果与实验值吻合较好，甲基丙烯醛-[BMIM]BF4体系关联的平均偏差为1．20％，甲醇-[BMIM]BF4体系关联的平均偏差为0.42％．

英文摘要：

Vapor-liquid equilibria in the binary systems of methacrolein and methanol with 1-butyl-3-methylimidazolium tetrafluoroborate （[BMIM]BF4） were determined at 350.75, 341.55 and 331.55 K in this work. The non-random tow-liquid equation was applied to correlate the experimental data. The results showed that the solubility of methacrolein in [BMIM]BF4 decreased with temperature increasing and increased with pressure increasing, and the solubility of methanol in [BMIM]BF4 had the similar phenomenon. Compared with ideal solution, the system of methacrolein with [BMIM]BF4 showed positive deviation, and the system of methanol with [BMIM]BF4 showed negative deviation. The correlated results with non-random tow-liquid model were in good agreement with the experimental data. The average relative deviation of methacrolein and [BMIM]BF4 system was 1.20%, and that of methanol and [BMIM]BF4 system 0.42%.