Liquid−Liquid Equilibria for the Binary Systems of N-Formylmorpholine with Branched Cycloalkanes

Liquid−liquid equilibrium (LLE) data were measured for three binary systems containing N-formylmorpholine and branched cycloalkanes (methylcyclopentane, methylcyclohexane, and ethylcyclohexane) over the temperature range around 300 K to close to the upper critical solution temperature (UCST) using c...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2003-05, Vol.48 (3), p.699-702
Main Authors: Ko, Na, Sangyoup, Kwon, Soyoung, Lee, Sungjin, Kim, Hwayong
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Liquid-liquid equilibria
Phase equilibria
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Summary:Liquid−liquid equilibrium (LLE) data were measured for three binary systems containing N-formylmorpholine and branched cycloalkanes (methylcyclopentane, methylcyclohexane, and ethylcyclohexane) over the temperature range around 300 K to close to the upper critical solution temperature (UCST) using circulation type equipment with an equilibrium view cell. The compositions of both branched cycloalkane rich and N-formylmorpholine rich phases were analyzed by on-line gas chromatography. The binary liquid−liquid equilibrium data were correlated with the NRTL and UNIQUAC equations using temperature-dependent parameters. Although clear deviation was observed in the vicinity of the UCST, the NRTL and UNIQUAC equations fitted the experimental data well. The solubility of cycloalkane in the N-formylmorpholine increases in the following order at the same temperature:  methylcyclopentane, methylcyclohexane, and ethylcyclohexane.
ISSN:0021-9568
1520-5134
DOI:10.1021/je020208v