甲氧酰基乙酸丁酯在超临界CO_2中的溶解度和偏摩尔体积研究  

Solubility and Partial Molar Volume of Butyl Methyl Malonate in Supercritical CO_2

作　　者：杨海健[1] 徐凌霄[1] 向力[1] 

机构地区：[1]中南民族大学化学与材料科学学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2012年第3期14-18,共5页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(51073175;20607031)

摘　　要：设计合成了非氟亲CO2化合物甲氧酰基乙酸丁酯C8H14O4,利用1H、13C核磁共振和元素分析表征其结构,在不同温度(313,333,353 K)和压力(8.3～12.3 MPa)下测试了其在超临界CO2中的溶解度.并运用Chrastil半经验模型对溶解度数据进行关联,由Kumar-Johnston理论计算了其在超临界相中的偏摩尔体积.结果表明:甲氧酰基乙酸丁酯在8.3MPa、313K下溶解度高达3.73×10-3mol/L,与理论计算结果相关性良好,平均相对偏差为19.13%,在313,333,353K温度下,其偏摩尔体积分别为-6403.82,-626.70,-308.98 cm3/mol.Butyl methyl malonate（C8H14O4）was synthesized and confirmed by 1H NMR,13C NMR and elemental analysis.Its solubility was measured at different temperatures（313,333,353K） and pressures（8.3 to 12.3 Mpa） in supercritical CO2.The data of solubility were correlated by Chrastil semiempirical model and its partial molar volume was calculated by Kumar-Johnston theory.The results indicated that the solubility of C8H14O4 was as high as 3.73×10-3 mol/L at 8.3 MPa and 313 K,which showed good correlation with Chrastil model and AARD was 19.13 %.The partial molar volume of was C8H14O4-6403.82,-626.70,-308.98 cm3/mol at 313,333,353K respectively.

关 键 词：甲氧酰基乙酸丁酯 超临界CO2 溶解度 Chrastil模型 偏摩尔体积 

分 类 号：O513[理学—低温物理] O623.624[理学—物理]