文献类型：期刊文献

中文题名：超临界二氧化碳萃取低挥发性液体混合物的相平衡

英文题名：Extraction of Low Volatility Liquid Mixtures with Supercritical Carbon Dioxide

作者：陈华[1];骆赞椿[1];章寿华[1];苏元复[1]

机构：[1]华东理工大学化学工程研究所,大连化学物理研究所

年份：1994

卷号：8

期号：1

起止页码：46

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：1995041504473);Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：二氧化碳;萃取;挥发液体;相平衡

外文关键词：Supercritical carbon dioxide; Supercritical extraction;low volatility liquid; Phase equilibrium

摘要：在半连续式实验设备中分别测定了苯甲醇－２－苯乙醇和苯甲酸酯－苯甲醇的等摩尔混合物与超临界ＣＯ２三元系相平衡数据。实验温度分别为３０８．２Ｋ和３１８．２Ｋ，压力范围为８～２０ＭＰａ。实验结果表明：对第一个三元系，两种液体在超临界ＣＯ２中的溶解度与ＣＯ２在液相中溶解行为密切相关；对第二个三元系，较高压力下，超临界流体相中苯甲酸甲酯浓度突然增大，而苯甲醇浓度变化不明显。通过引入考虑分子体积差别的二元作用参数，用Ｐｅｎｇ－Ｒｏｂｉｎｓｏｎ方程对气液平衡数据进行了关联。
Extraction equilibrium of the equal-molar mixtures of benzyl alcohol-2-phenethyl alcohol and methyl benzoate-benzyl alcohol by supercritical carbon dioxide are determined in a semi-flow apparatus at two temperatures (308. 2K and 318. 2K) and pressures 8-20MPa. For the system CO2-benzyl alcohol-2-phenethyl alcohol, experimental results show that the solubilities of the two liquids in supercritical carbon dioxide are closely related to the solubility of carbon dioxide in the liquid phase.By means of the mixing rules with binary interaction parameters accounting for the molecular size differences,the Peng-Robinson equation of state can give reasonable correlation for the experimental phase equilibrium data for this asymmetric ternary system.For the system CO2-methyl benzoate-benzyl alcohol, experimental results show that, at higher pressures,methyl benzoate concentration in the over head fluid phase increasesdramatically. This suggests that multi-phace co-existence states could occur in these conditions.The results show that,for liquid mixtures with relatively large disparity in molecular structure,there may exist certain temperature and pressure regions within which selectivity for more readilysoluble components increase dramatically.