The solubility of two monoterpenes in supercritical carbon dioxide

Richter, Miroslav; Sovová, Helena

doi:10.1016/0378-3812(93)80020-n

Cited by 31 publications

(16 citation statements)

References 12 publications

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“…(4) with those from literature. It may be seen that these results agree well with those obtained by McHugh & Paulaitis [9], Richter & Sovova [13], Unlu [16], Baskaya [17], King et al [1], and Lim et al [30] for the CO 2 -naphthalene system and Kurink et al [10], Johnston et al [11] and Dobbs et al [31] for the CO 2 -phenanthrene system. The 308.15 K isotherm is characteristic of solid solubility behavior at temperatures near the critical temperature of the supercritical carbon dioxide solvent.…”

Section: Resultssupporting

confidence: 82%

“…The solubility data for α-pinene, cis-verbenol and naphthalene in carbon dioxide have been measured at the temperatures from 313.15K to 328.15K and pressures from 50 bar to 120 bar by using a dynamic flow apparatus and they have been correlated using a compressed gas model with the Peng-Robinson equation of state (PR-EOS) and an empirical equations based on the dependence of the concentration of solute on the density of pure solvent by Richter and Sovova' [13].…”

Section: Literature Reviewmentioning

confidence: 99%

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Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

Karim¹,

Kassim²,

Hameed³

2010

TOTHERJ

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Abstract:The equilibrium mole fraction solubility of low volatile solid components (naphthalene and phenanthrene) in supercritical pure carbon dioxide was studied at temperature range (308.15-333.15 K) and pressures up to 200 bars. In the present study a measure of the effect of temperature and pressure were considered in the extraction process using supercritical carbon dioxide. The experiments were carried out using a designed apparatus similar to that used by King et al.,[1]. In this apparatus, the extracted gas (carbon dioxide) was re-circulated continuously over the component to be extracted via a sample bomb till equilibrium is reached. The sample bomb is then isolated and its contents were analyzed.The results of analysis showed that the solubility of naphthalene and phenanthrene expressed in mole fraction depend strongly upon the pressure (density) of the supercritical carbon above the critical density.The obtained laboratory data are correlated with three cubic equations of state, Redlich-Kwong (RK), Soave-RedlichKwong (SRK), and Peng-Robinson (PR). Comparison of experimental phase equilibrium data with the results predicted by the equations of state shows good representation.

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Section: Resultssupporting

confidence: 82%

Section: Literature Reviewmentioning

confidence: 99%

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

Karim¹,

Kassim²,

Hameed³

2010

TOTHERJ

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“…The saturator was submerged in a water bath with temperature-controlled within ±0.1 • C. The supercritical fluid saturated with menthol was depressurised through a home-made micrometer valve that was electrically heated to compensate for the heat consumption during gas expansion. The valve was designed to minimise the dead volume and thus to reduce the amount of the solute that could settle down inside while it precipitated from the expanding solution [7].…”

Section: Solubility Measurementmentioning

confidence: 99%

High-pressure equilibrium of menthol+CO2

Sovová

Stateva

Galushko

2007

The Journal of Supercritical Fluids

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“…The cuticular waxes, typically long-chain alkanes, located on the surface of vegetable matter, are inevitably extracted, even though they are not very soluble in supercritical CO 2 [14,15] compared to those of hydrocarbons and oxygenated mono-and sesquiterpenes [16,17]. The problem is overcome with a stepwise separation [18,19] on the extracted product.…”

Section: Resultsmentioning

confidence: 99%

Comparative analysis of the oil and supercritical CO₂extract ofArtemisia arborescensL. andHelichrysum splendidum(Thunb.) Less.

Piras

Porcedda

2006

Natural Product Research

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Isolation of volatile concentrate from the dried leaves of Artemisia arborescens and of Helichrysum splendidum has been obtained by supercritical extraction with carbon dioxide. To obtain a pure volatile extract devoid of cuticular waxes, the extraction products were fractionated in two separators operating in series. A good extraction process was obtained operating at 90 bar and 50 degrees C in the extraction vessel, at 90 bar and at -5 degrees C in the first separator and at a pressure between 20 and 15 bar and temperatures in the range 10-20 degrees C in the second one. The composition of the volatile concentrate has been analyzed by GC/MS. The volatile concentrate of A. arborescens was found to contain: trans-thujone (13.96%), camphor (6.15%) and chamazulene (5.95%). The main constituents in the extract of H. splendidum were: germacrene D-4-ol (17.08%), germacrene D (9.04%), bicyclogermacrene (8.79%) and delta-cadinene (8.43%). A comparison with the oils obtained by hydrodistillation is also given. The differences observed between the composition of the SFE volatile concentrates and of the hydrodistilled (HD) oils were relevant. Indeed, the HD oils had a blue color whereas the volatile concentrates were pale yellow. The HD oil of H. splendidum had a blue color due to the presence of guaiazulene (0.42% vs 0%), whereas the coloration of HD oil of A. arborecens was due to the high concentration of chamazulene (26.64% vs 3.37%).

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The solubility of two monoterpenes in supercritical carbon dioxide

Cited by 31 publications

References 12 publications

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

High-pressure equilibrium of menthol+CO2

Comparative analysis of the oil and supercritical CO₂extract ofArtemisia arborescensL. andHelichrysum splendidum(Thunb.) Less.

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The solubility of two monoterpenes in supercritical carbon dioxide

Cited by 31 publications

References 12 publications

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide

High-pressure equilibrium of menthol+CO2

Comparative analysis of the oil and supercritical CO2extract ofArtemisia arborescensL. andHelichrysum splendidum(Thunb.) Less.

Contact Info

Product

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Comparative analysis of the oil and supercritical CO₂extract ofArtemisia arborescensL. andHelichrysum splendidum(Thunb.) Less.