Solid-Liquid Equilibria for Catehol/4-Methoxyphenol

• Main Authors: Wu Fu Lie, 吳福利
• Other Authors: Lee Ming-Jer
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/80439110064751809735

碩士 === 國立臺灣科技大學 === 化學工程研究所 === 84 === 1,4-Butanediol is used as an auxiliary agent in the present study to separate the close-boiling, eutectic mixture of 4-methoxyphenol and catechol by a crystallization method. Solid- liquid equilibria (SLE) were measured by a solid-disappearance method for the binary and the ternary systems composed of 4- methoxyphenol, catechol, 1,4-butanediol, or p-cresol. The results show that a 1:1 adducted compound forms in the 1,4-butanediol+catechol mixtures. A separation strategy is proposed according to the experimental results of the ternary system. The SLE data are well correlated by the NRTL model for those binary systems without complex formation. Both the ideal- chemical model (ICM) and the regular solution-chemical model with one adjustable parameter (Modified RSCM) were applied to correlate the SLE data of 1,4-butanediol+catechol mixtures that exhibit a complex compound to be formed. The Modified RSCM with the determined binary parameters is capable of predicting the SLE phase boundaries for the ternary system to within a reasonable accuracy.