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Optimizing Conditions for the Purification of Linoleic Acid from Sunflower Oil by Urea Complex Fractionation
Author(s) -
Wu Mingyi,
Ding Hui,
Wang Song,
Xu Shimin
Publication year - 2008
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-008-1245-7
Subject(s) - urea , crystallization , fractionation , sunflower oil , chromatography , linoleic acid , chemistry , sunflower , fatty acid , ethanol , biochemistry , organic chemistry , agronomy , biology
The separation and purification of linoleic acid (LA) from sunflower seed oil by urea complex fractionation was studied. Crystallization reaction conditions of urea inclusion were optimized using the response surface method, and the optimal model was developed. Using the linear weighting method of the fitting model for optimization, the optimal balance between the purity and the recovery of LA was obtained. Under optimal conditions, the purity of LA was 87.8%, and the recovery was 83.4% at a urea‐to‐fatty acids ratio (w/w) of 0.94, 95% ethanol‐to‐urea (v/w) of 5.00, a crystallization temperature of 18.0 °C, and a crystallization time of 5.0 h. Verification results revealed that the predicted values from these models were reasonably close to the experimentally observed values.