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二甘醇单醚类化合物在超临界二氧化碳中的溶解行为
引用本文:杨海健,金晶,张宁,张宇,李欢欢,向力.二甘醇单醚类化合物在超临界二氧化碳中的溶解行为[J].中南民族大学学报(自然科学版),2011,30(4):1-5.
作者姓名:杨海健  金晶  张宁  张宇  李欢欢  向力
作者单位:中南民族大学化学与材料科学学院,武汉,430074
基金项目:基金项目国家自然科学基金资助项目
摘    要:在温度3333、43、3533、63 K,压力8.0~14.8 MPa的范围内,采用静态观察法测定了二甘醇单甲醚、二甘醇单乙醚和二甘醇单丁醚在超临界CO2中的溶解情况,并利用2种半经验模型Bartle和Chrastil分别对实验数据进行了关联计算,其中由Chrastil经验模型计算所得的3种化合物的平均相对误差依次为3.30%、6.22%、5.52%,由Bartle经验模型计算所得绝对相对偏差依次为12.5%、26.44%、21.84%,2种经验模型拟合结果与实验值关联度较高.根据Kumar-Johnston理论分别计算了3种化合物在超临界二氧化碳中的偏摩尔体积(-1681.77~-534.51),为该体系应用于超临界萃取提供了理论基础.

关 键 词:超临界二氧化碳  二甘醇单醚类  半经验模型  溶解度  偏摩尔体积

Dissolution Behavior of Really Diethylene Glycol Single Ethers in Supercritical Carbon Dioxide
Yang Haijian,Jin Jing,Zhang Ning,Zhang Yu,Li Huanhuan,Xiang Li.Dissolution Behavior of Really Diethylene Glycol Single Ethers in Supercritical Carbon Dioxide[J].Journal of South-Central Univ for,2011,30(4):1-5.
Authors:Yang Haijian  Jin Jing  Zhang Ning  Zhang Yu  Li Huanhuan  Xiang Li
Institution:Yang Haijian,Jin Jing,Zhang Ning,Zhang Yu,Li Huanhuan,Xiang Li(College of Chemistry and Materials Science,South-Central University for Nationalities,Wuhan,430074,China)
Abstract:The solubilities of really diethylene glycol single methyl ether, really diethylene glycol single ether, ChanDing diethylene glycol ether in supercritical CO2 were determined by fixed volume visualization method at 333,343,353,363 K and at pressures from (8.0 to 14. 8) MPa. To confirm the tested solubility, two density-based correlations proposed by Bartle and Chrastil were investigated. The results showed good self-consistency with the data calculated by the two semiempirical equations and the average relative deviations of the measured values were 12.5 %, 26.44 %, 21.84 % from that estimated by Bartle's method and 3.30 %, 6.22 %, 5.52 % estimated by Chrastil's method for the three compounds respectively. According to the Kumar and Johnston theory , the partial molar volumes of each compounds in the supercritical phase were calculated and the results were between- 1681.77 and -534.51 .
Keywords:supercritical carbon dioxide  really diethylene glycol single ethers  semi-empirical model  solubility  partial molar volume
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