期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 101, 期 -, 页码 87-94出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2015.03.008
关键词
Bis (2-ethylhexyl) sebacate; Dimethyl sebacate; Retrograde behavior; Solution model; Wilson activity coefficient model
资金
- Council of Scientific and Industrial Research (CSIR India)
The synthesis of high molecular weight esters such as bis (2-ethylhexyl) sebacate is of significance for its use as a lubricant. This ester is synthesized by the transesterification of dimethyl sebacate with 2-ethylhexanol. Therefore, the solubilities of bis (2-ethylhexyl) sebacate and dimethyl sebacate were determined at 308-328 K at pressures of 10-18 MPa in supercritical carbon dioxide. The solubility of dimethyl sebacate was always higher than bis (2-ethylhexyl) sebacate at a given temperature and pressure. The Mendez-Teja model was used to verify the self-consistency of data. Further, a new semi-empirical model with three parameters was developed using the solution theory coupled with Wilson activity coefficient. This model was used to correlate the experimental data of this work and solubilities of many high molecular weight esters reported in the literature. (C) 2015 Elsevier B.V. All rights reserved.
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