High-pressure equilibrium of menthol + CO2

被引：21
|
作者：
Sovova, Helena
Stateva, Roumiana P.
Galushko, Anatolii A.
机构：
[1] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, Prague 16502, Czech Republic
[2] Bulgarian Acad Sci, Inst Chem Engn, Sofia 1113, Bulgaria
来源：
JOURNAL OF SUPERCRITICAL FLUIDS | 2007年 / 41卷 / 01期
关键词：
SRK-thermodynamic model; solubility; phase equilibria; melting point depression; menthol; carbon dioxide;
D O I：
10.1016/j.supflu.2006.08.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Data on menthol + CO2 phase behaviour and menthol solubility in dense CO2 are needed to optimise supercritical extraction of peppermint oil. The paper presents novel experimental data for the phase diagram of (-)-menthol+ CO2 binary system in the temperature range 5-40 degrees C and pressures up to 8.2 MPa, including menthol melting point depression, as well as data on menthol solubility in dense CO2 in the temperature range 30-60 degrees C and pressure range 6.6-14.4 MPa. The system exhibits quadruple point from which four three phase loci originate; the point was located at 4.32 MPa and 9.9 +/- 0.1 degrees C. The solubility data obtained in this work confirm previous results of Maier and Stephan. Both the solubility of menthol and the pressure-temperature diagram of the system menthol + CO2 were modelled with the Soave-Redlich-Kwong equation of state and good agreement with the experimental data was achieved. (c) 2006 Elsevier B.V. All rights reserved.
引用
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页码：1 / 9
页数：9
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