Sunghyun Jang

Solubility of triclocarban in pure alkanols at different temperatures

Triclocarban solubility in six pure alcohols was determined in the temperature interval from 278.15 to 318.15 K. The experimental solubility data were correlated by the Wilson, the nonrandom two liquid (NRTL) and the universal quasi-chemical (UNIQUAC) models. The data are well fitted with all three models for the six pure alcohols studied here. Also, ab initio geometry optimization of triclocarban was performed using the density functional theory (DFT) based on DMol3 method.

Isothermal vapor-liquid equilibria for the binary systems of ethylene glycol monopropyl ether with 2,2-dimethylbutane and 2,3-dimethylbutane

Isothermal vapor liquid equilibria for the binary system of ethylene glycol monopropyl ether with 2,2-dimehylbutane and 2,3-dimethylbutane were measured in a circulating water bath at 303.15, 318.15, and 333.15 K. The apparatus was in-house designed and manufactured. Consistency testing of the apparatus was done by comparing the measured vapor pressures to the calculated vapor pressures from the Antoine equation. The measured systems were correlated with a Peng-Robinson equation of state (PR) combined with Wong-Sandler mixing rule for the vapor phase, and NRTL, UNIQUAC, and Wilson activity coefficient models for the liquid phase. All the measured systems showed good agreement with the correlation results.

3-메틸펜테인과 에틸렌 글리콜 모노프로필 에테르 및 에틸렌 글리콜 아이소프로필 에테르 혼합물에 대한 2성분계 등온 기-액 상 평형

− Isothermal vapor liquid equilibria for the binary system of 3-methylpentane with ethylene glycol monopropyl ether (C 3 E 1 ) and ethylene glycol isopropyl ether (iC 3 E 1 ) were measured at 303.15, 318.15, and 333.15K. In our previous work, phase equilibria for the binary system of C 3 E 1 mixtures were investigated according to the chain length of alkane, alcohol or those isomer. But in this study, we discussed the different effect of C 3 E 1 and its isomer, iC 3 E 1 , on the phase equilibria. The measured systems were correlated with a Peng-Robinson equation of state (PR EOS) combined with Wong-Sandler mixing rule for the vapor phase, and NRTL, UNIQUAC, and Wilson activity coefficient models for the liquid phase. All the measured systems showed good agreement with the correlation results. And it was found that the phase equilibria showed very little difference between the iC 3 E 1 mixture system and the C 3 E 1 mixture system.