Cosolvent effect of ethanol on the solubility of lutein in supercritical carbon dioxide

被引：24
|
作者：
Araus, Karina A. [1 ]
Casado, Victor [2 ]
del Valle, Jose M. [2 ]
Robert, Paz S. [3 ]
de la Fuente, Juan C. [4 ]
机构：
[1] Univ Alberta, Agr Food & Nutr Sci Dept, 116 St & 85 Ave, Edmonton, AB, Canada
[2] Pontificia Univ Catolica Chile, Dept Ingn Quim & Bioproc, Avda Vicuna Mackenna 4860, Santiago, Chile
[3] Univ Chile, Dept Ciencia Alimentos & Tecnol Quim, Avda Vicuna Mackenna 20, Santiago, Chile
[4] Univ Tecn Federico Santa Maria, Lab Termodinam Proc, Dept Ingn Quim & Ambiental, Avda Espana 1680, Valparaiso, Chile
来源：
JOURNAL OF SUPERCRITICAL FLUIDS | 2019年 / 143卷
关键词：
Solubility; Lutein; Ethanol; Cosolvent effect; Supercritical carbon dioxide; Correlation; BETA-CAROTENE; FLUID EXTRACTION; OPTIMUM CONDITIONS; CO2; EXTRACTION; ASTAXANTHIN; LYCOPENE; PIGMENTS; MODIFIERS; OLEORESIN; BEHAVIOR;
D O I：
10.1016/j.supflu.2018.08.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This contribution presents new high-pressure solubility data of solid trans-lutein in pure carbon dioxide (CO2), and mixtures of CO2 and ethanol. The cosolvent effect of ethanol was determined by comparing lutein solubility between the ternary (CO2 + ethanol + lutein) and binary (CO2 + lutein) systems at (313, 323, and 333) K and from (18.70 to 33.55) MPa. 92% pure lutein was isolated from marigold flower petals. Solubility was measured using a dynamic-analytical method with recirculation and online analysis of the CO2-rich phase. The solubility of lutein in pure and ethanol-modified CO2 increased with system temperature and pressure. Solubilities in pure CO2 ranged from 0.82 10(-6) mol mol(-1) at (313 K and 18.70 MPa) to 2.45 10(-6) mol mol(-1) at (333 K and 32.91 MPa). The highest solubility of lutein in CO2 experimentally measured was 4.02 10(-6) mol mol(-1) at (333 K and 32.91 MPa) when adding 0.0211 mol mol(-1) of ethanol.
引用
收藏
页码：205 / 210
页数：6
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