乙酸乙酯-乙醇-水-甘油体系中部分组分之间汽液平衡数据的测定及关联

Measurement of two compounds VLE data and calculation of three compounds VLE data in hylacetate-Ethanol-Water-Glycerol

生产乙酸乙酯的产物乙醛、乙醚采用精馏容易脱除，乙酸乙酯、乙醇、水形成二元、三元共沸物，则难以分离，共沸法和萃取精制乙酸乙酯，工艺较复杂，能耗大；复合萃取一次可得99％以上乙酸乙酯，同时可得95％以上乙醇，用水量仅为原料量的2倍，工艺简单，能耗低。本文测定乙酸乙酯、乙醇、水在甘油中的γ^∝及二元体系的VLE数据，由三对二元体系模型参数计算乙酸乙酯-水-甘油及乙酸乙酯一乙醇一甘油的VLE数据，为萃取模拟计算及试验提供基础数据。

Activity coefficients(r~∞)of ethyl acetate-ethanol-water were measured at glycerol by gas-chromatography.Model references were correlated with Wilson equation by single method.VLE data of ethyl acetate-ethanol and tehyl acetate-water were measured.VLE data of ethyl acetate-ethanol-glycerol and ethyl acetate-water-glycerol were calculated by model references of two systems.Results of measurement and calculation was provided for extraction simulation calculation of ethyl acetate-ethanol-water and ethyl acetate-ethanol.