Supercritical fluid extraction of tocopherol concentrates from olive tree leaves

被引:105
作者
de Lucas, A
de la Ossa, EM
Rincón, J
Blanco, MA
Gracia, I
机构
[1] Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13004, Spain
[2] Univ Cadiz, Fac Ciencias, Dept Ingn Quim, Puerto Real 11510, Cadiz, Spain
关键词
tocopherol; supercritical carbon dioxide; supercritical extraction; concentration;
D O I
10.1016/S0896-8446(01)00132-2
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
Olive tree leaves, a residue obtained during the harvest of olives for oil production were treated with supercritical carbon dioxide to analyze the possibility of obtaining tocopherol concentrates. Oil and tocopherol extraction rates were determined as a function of pressure (25-45 MPa), particle size (0.25-1.5 mm), solvent flow (0.5-1.5 SL/min) and temperature (313-333 K). Two optimal extraction conditions were determined, considering the maximum recovery or concentration criterion. Those conditions led to a highly valuable extract of 74.5 and 97.1% (w/w) tocopherol concentration, respectively. Results obtained were compared to hexane soxhlet extraction. (C) 2002 Elsevier Published by Science B.V.
引用
收藏
页码:221 / 228
页数:8
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