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在常压下测定了水-乙醇-甲基异丁基甲酮体系在308.15,318.15,328.15 K的液液相平衡数据。用Hand方程和Othmer-Tobias方程对实验数据进行拟合,结果表明:Hand方程拟合效果优于Othmer-Tobias方程。采用NRTL模型和UNIQUAC模型对实验数据进行了关联,回归得到了该三元物系的二元交互参数;并对此物系的相平衡数据进行了预测,由模型计算值和实验值的均方根偏差知,NRTL模型能更好地与实验数据吻合。 相似文献
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二甲基甲酰胺-苯-正庚烷三元体系的液液平衡 总被引:1,自引:0,他引:1
本文采用改进的液液平衡釜,在常压下测定了293.2 K和298.2 K时的二甲基甲酰胺-苯-正庚烷两套三元体系的液液平衡数据,用NRTL和UNIQUAC两种模型关联了298.2K的液液平衡数据,结果令人满意。通过作图法所得褶点与由模型求得的数据相当一致。 相似文献
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在甲基三丁酮肟基硅烷的生产过程中会产生部分含丁酮肟的废水,用萃取方法可回收丁酮肟。为获得萃取工艺所需的基础数据,在常压、60℃温度下,以工业实际废水为物料,进行液液相平衡实验,用拟三元方法处理丁酮肟-水-异辛醇三元体系的液液相平衡数据,获得了三元体系平衡相图。实验数据用非随机两相液体(NRTL)模型进行了关联,得出了该三元体系的NRTL模型参数。将实验数据与关联结果进行比较,结果表明,NRTL模型能对该三元体系进行较准确的关联。 相似文献
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用平衡釜法测定了常压下,297.15 K下2-甲基丁烷-苯-环丁砜体系以及313.15 K下2,2-二甲基丁烷-苯-环丁砜体系三元液液平衡数据,并应用Othmer-Tobias关联式对数据质量进行检验。然后,分别用NRTL和UNIQUAC模型对所测数据进行了热力学关联,得到了相应的二元能量交互作用参数,并由这些参数对实验点进行理论计算,由均方误差以及平均绝对误差值结果显示,计算值与实验值吻合良好,说明NRTL和UNIQUAC模型均可适用于芳烃抽提过程的模拟和计算。 相似文献
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In this work, liquid–liquid equilibria(LLE) data for the ternary system methyl tert-butyl ketone(MTBK) + o, m,p-benzenediol + water were investigated at 333.2 K, 343.2 K and 353.2 K under 101.3 kPa. The performance of MTBK to extract o, m, p-benzenediol from wastewaters was estimated by partition coefficients and separation factors. The Hand and Bachman equations were both applied to check the reliability of the experimental LLE data. Furthermore, the Non-Random Two-Liquid(NRTL) and Universal Quasi Chemical(UNIQUAC) models were applied to correlate the measured LLE data. The results showed a good agreement with the determined ternary LLE data with the root-mean-square error(RMSE) values below 0.71%. MTBK was proved to be a promising extracting agent in extracting benzenediols from effluents. 相似文献
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Liquid-liquid equilibrium (LLE) data for the water butyric acid nonanol system have been determined experimentally at the temperatures of 298.15 K, 308.15 K and 318.15 K. Tie-line compositions were correlated by Othmer-Tobias method. The universal quasichemical functional group activity coefficient (UNIFAC) and modified UNIFAC methods were used to predict the phase equilibrium in the system using the interaction parameters between CH3, CH2, COOH, OH and H2O functional groups. Distribution coefficients and separation factors were evaluated for the immiscibility region. 相似文献
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Sulfolane is an important aprotic polar solvent. Liquid-liquid equilibrium(LLE) data for the ternary systems of water + 1,2-dichloroethane + sulfolane were measured at temperatures of 288.15, 298.15 and 308.15 K under the atmospheric pressure. The distribution coefficient and selectivity were determined from the measured LLE data, which showed that 1,2-dichloroethane is a suitable extractant for the recovery of sulfolane from its aqueous solution. The nonrandom two-liquid(NRTL) model and the uni... 相似文献
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Agnes Fröscher Kai Langenbach Erik von Harbou Hans Hasse 《American Institute of Chemical Engineers》2019,65(2):783-791
The associating lattice cluster theory (ALCT) is developed in this work. It is especially useful for describing mixtures of oligomers of varying architecture. As the influence of the structure is predicted, it can also be applied in cases in which pure component data are lacking. ALCT is used here for the calculation of liquid–liquid equilibria (LLE) in the system oleic acid (OA) + formic acid (FA) + formoxystearic acid that is interesting for biopolymer production. Experimental studies of LLE in that system were carried out at 296, 313, and 333 K. Ternary mixtures were prepared from the educts OA and FA using heterogeneous acidic catalysis. Quantitative NMR spectroscopy was applied for the analysis. For the educt system also the excess enthalpy was studied by isothermal titration calorimetry. The prediction of the ternary LLE by ALCT succeeds. © 2018 American Institute of Chemical Engineers AIChE J, 65: 783–791, 2019 相似文献
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A. Young Jeong Jeong Ah Cho Yugyeom Kim Hang-Kyu Cho Kyu Yong Choi Jong Sung Lim 《Korean Journal of Chemical Engineering》2018,35(6):1328-1334
Liquid-liquid equilibrium (LLE) data was measured for the water+2,3-butanediol+1-pentanol ternary system at 298.2, 308.2, and 318.2 K under atmospheric pressure. Binodal solubility curves and complete ternary phase diagrams were experimentally obtained in mass fraction at these three different temperatures. The consistency of the tieline results was verified by using Othmer-Tobias and Hand plots. Distribution coefficients and separation factors of 2,3- butanediol were evaluated for each tie-line, and the effect of temperature was also investigated. It was found that the distribution coefficients and separation factors of 2,3-butanediol increased with temperature. The experimental LLE data were correlated by the UNIQUAC and NRTL models, and the binary interaction parameters calculated from these models have been reported. Both models successfully predict the experimental tie-line data within average root-mean-square deviations (RMSD) being less than 1.38% and 1.49% from the UNIQUAC and NRTL models, respectively. 相似文献
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裂解汽油是含有烯烃的重要芳烃资源,二甲基亚砜(DMSO)能够从高烯烃含量组分中选择性萃取芳烃,测定相应体系液-液平衡是裂解汽油中的芳烃萃取过程研究开发的理论基础。测定了常压下293.15、298.15、303.15 K时甲苯-正己烯-DMSO体系液-液平衡数据,获得了三元体系的相图和褶点,并采用Hand方程和NRTL方程进行关联。体系中甲苯对正己烯选择性系数为2~6,表明DMSO萃取分离甲苯和正己烯理论上可行。通过体系液-液平衡关联获得了NRTL方程模型参数,利用NRTL模型对该体系进行计算,计算值与实验值的平均偏差较小,说明NRTL模型适用于该体系的液-液平衡。 相似文献
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Both 1-benzyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [BzMeIM][NTf2], and 1-benzylpyridinium bis(trifluoromethylsulfonyl)imide, [BzPY][NTf2], were used to separate toluene from heptane through liquidliquid equilibria (LLE). The LLE of two ternary systems of toluene, n-heptane, and [BzMeIM][NTf2] and [BzPY][NTf2], were experimentally determined at temperature of 293.2 K and 0.1MPa. The LLE experiments were also performed at 303.2 and 313.2 K to investigate the effect of temperature on toluene recovery. The distribution ratio of toluene and the selectivity in these two ternary systems were calculated and compared with different ternary mixtures. The LLE measured data were well correlated with nonrandom two-liquid (NRTL). 相似文献
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Liquid-liquid equilibrium (LLE) data were measured for the ternary system of water+resorcinol+mesityl oxide under atmospheric pressure at temperatures of (298.2, 323.2, 333.2, 343.2 and 353.2) K. The reliability of the experimental data was verified by the Hand and Bachman equations. The distribution coefficient and selectivity were calculated from the experimental LLE data, which showed high efficiency of mesityl oxide extracting resorcinol from the aqueous solution. The NRTL and UNIQUAC models were employed to fit the measured experimental LLE data and yield corresponding binary interaction parameters. 相似文献
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水-异丙醚-苯酚和水-异丁醇-苯酚体系的液液平衡研究 总被引:1,自引:0,他引:1
水-异丙醚-苯酚体系的研究在工业上和环境保护上具有重要意义,但至今未见到液液平衡(LLE)数据的报导今报导了这一系统在两个工作温度的LLE数据.为了寻找萃取剂异丙醚的替代物,我们同时进行了水-异丁醇-苯酚体系的液液平衡研究. 在常压下使用GC-14B气相色谱仪,测定了319 K和329 K时水-异丙醚-苯酚体系的液液平衡(LLE)数据以及水-异丁醇-苯酚体系在319 K和333 K时的LLE数据.用内标法测定了这些体系中除水以外的各组分浓度.在水-异丙醚-苯酚体系中,异丙醚测量的根均方误差为1.4%;苯酚测量的根均方误差为4.6%.在水-异丁醇-苯酚体系中,异丁醇测量的根均方误差为3.1%:苯酚测量的根均方误差为4.6%. 文中给出了上述四个等温截面的LLE数据,同时也给出了相应示意图.2003年我们用工作曲线法(外标法)给出了水-异丙醚-苯酚在319K的等温截面图.两者比较,总体上是类似的,但内标法结果更可靠.这次的研究,还纠正了当时的一个错误估计.对于水-异丁醇-苯酚体系的液液平衡研究表明,异丁醇也是从废水中萃取苯酚的良好萃取剂.但是异丁醇的再生及其循环利用并不如异丙醚那样容易. 相似文献