NDLI: Phase behavior of arbutin/ethanol/supercritical CO$

Content Provider	Springer Nature Link
Author	Han, Chang Nam Kang, Choon Hyoung
Copyright Year	2017
Abstract	The phase behavior of a ternary system containing arbutin, which is effective for skin lightening, in a solvent mixture of ethanol and supercritical carbon dioxide (CO$_{2}$) was investigated. A high-pressure phase equilibrium apparatus equipped with a variable-volume view cell was used to measure the phase equilibrium loci of the ethanol+CO$_{2}$ binary mixture from 298.2 K to 313.2 K and pressures between 2MPa and 9MPa. The solubility of arbutin in the mixed solvent comprising ethanol and CO$_{2}$, which equivalently represents the critical locus of T-x, was determined as a function of temperature, pressure, and solvent composition by measuring the cloud points under various conditions. Throughout, the arbutin loading was maintained at 1.5 wt% on a CO$_{2}$-free basis in the solvent mixture and the pressure and temperature were varied up to 14 MPa and 334 K, respectively. For a CO$_{2}$ loading less than 34wt% on ethanol basis, the cloud point was not observed. However, the solid remained undissolved when the CO$_{2}$ loading exceeded 54 wt%. Between these loadings, steep and almost pressure-insensitive solubility curves, which extended downward to the vaporization boundary, were found.
Starting Page	1781
Ending Page	1785
Page Count	5
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	34
Issue Number	6
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2017-05-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arbutin Supercritical CO$_{2}$ Cloud Point Solubility Mixed Solvent Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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