Supercritical phase behavior: The entrainer effect

Walsh, John MacLaren; Ikonomou, George D.; Donohue, Marc D.

doi:10.1016/0378-3812(87)85042-2

Cited by 137 publications

(63 citation statements)

References 22 publications

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“…In binary solvent mixtures, the cosolvent can show enrichment in the cybotactic region due to more favourable solute-cosolvent intermolecular interactions (13). This should be reflected in the solvatochromic shifts observed.…”

Section: Linear Free Energy Relationsmentioning

confidence: 98%

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Solvatochromic parameters and solubilities in supercritical fluid systems

O’Neill¹,

Kruus²,

Burk³

1993

Can. J. Chem.

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Spectroscopic studies of the compound 2-nitroanisole in supercritical fluids CO2 and N2O show that π* values vary linearly with density. The solubility trends in these single component supercritical fluid solvents qualitatively followed the trends in solvent power predicted from π*. However, the relative solvent power predicted for CO2 and N2O based on π* resulted in an opposite order to what was determined experimentally through solubility measurements. The π* parameter may be of some use for solubility prediction if only a limited set of solute–solvent systems are considered. Measurements of π*, especially those in binary supercritical fluid solvents, suggest that π* could be a valuable tool for probing the solute-organized cybotactic region.

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Section: Linear Free Energy Relationsmentioning

confidence: 98%

“…The bulk of the quantification data on solubilities and increases in solvent power was done for systems that have specific solute-solvent interactions (e.g., H-bonding) (13,20,21). Much less success has been realized for the seemingly simpler systems possessing only nonspecific-type interactions (i.e., dispersion forces).…”

Section: Solubilitymentioning

confidence: 99%

Solvatochromic parameters and solubilities in supercritical fluid systems

O’Neill¹,

Kruus²,

Burk³

1993

Can. J. Chem.

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“…The nature of the solute to be extracted is the critical basis for co-solvent choice (Walsh et al 1987). The co-solvent improves polarity of the extraction fluid and hence increases the extraction yield.…”

Section: Effect Of Co-solventmentioning

confidence: 99%

Modeling and optimization of supercritical fluid extraction of anthocyanin and phenolic compounds from Syzygium cumini fruit pulp

Maran¹,

2014

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Supercritical carbon dioxide extraction (SC-CO 2 ) of total anthocyanin and phenolic compounds from jamun fruits was investigated using three factors at three levels Box-Behnken response surface design. Experiments were conducted to evaluate the effects of three independent variables (pressure, temperature and co-solvent flow rate) on the maximum extraction yield of anthocyanin and phenolic compounds from jamun fruits. From the experimental data, second order polynomial mathematical models were developed with high coefficient of determination values (R 2 >0.98). From response surface plots, pressure, temperature and co-solvent flow rate exhibited independent and interactive effects on the extraction yields. Pressure of 162 bar, extraction temperature at 50°C and co-solvent flow rate of 2.0 g/min was identified as optimal conditions. Under these optimal conditions, the experimental value agreed well with the predicted values and indicates the suitability of developed models.

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“…Ethanol is commonly used as cosolvent or modifier for the extraction of natural products because the toxicity of ethanol to the human body is low (Catchpole, Grey, & Noermark, 1998;Temelli, 1992;Walsh, Greenfield, Ikonomou, & Donohue, 1989;Walsh & Ikonomou, 1987). Furthermore, it can be easily removed from the food matrix although there is a limited information regarding the effect of ethanol and other cosolvents on the SC-CO 2 extraction of cocoa butter.…”

Section: Introductionmentioning

confidence: 99%