Analysis of cosolvent effect on supercritical carbon dioxide extraction for alpha-pinene and 1,8-cineole

作者：Shimoyama Yusuke^*; Tokumoto Hiroki; Matsuno Takumi; Iwai Yoshio

来源：Chemical Engineering Research and Design, 2010, 88(12A): 1563-1568.

DOI：10.1016/j.cherd.2010.04.009

• Extraction
• Supercritical fluid
• Cosolvent effect
• Eucalyptus oil

The solubilities of alpha-pinene and 1,8-cineole in supercritical carbon dioxide with and without cosolvent were measured by using a circulation type apparatus coupled with an on-line Fourier transform infrared (FT-IR) spectroscope at 323 K and 8.0 MPa. The cosolvents interested in this work were ethanol, water, acetone and hexane. The solubilities were measured under vapor-liquid two phases. The effects of cosolvents on the solubilities and selectivities of alpha-pinene and 1,8-cineole in supercritical CO(2) were investigated. The selectivities at feed concentration of cosolvent of 0.056 mol L(-1) were increased 1.23 times by ethanol and decreased 0.82 times by hexane. Peng-Robinson equation of state with a quadratic mixing rule was used for correlations of the solubilities for alpha-pinene and 1,8-cineole in supercritical CO(2) with and without cosolvent. The correlated results reproduce the experimental data of cosolvent effects on the solubilities and selectivities of alpha-pinene and 1,8-cineole in supercritical CO(2).

• 出版日期2010-12