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Optimizing Conditions for the Purification of Linoleic Acid from Sunflower Oil by Urea Complex Fractionation

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Journal of the American Oil Chemists' Society

Abstract

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.

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Acknowledgments

Financial support from the government of Tianjin, People’s Republic of China (no. 07JCZDJC02600), is gratefully acknowledged. Thanks also given to J. J. Zeng for his valuable suggestions and Dr. X. Han for his comments on this manuscript.

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, 300072, Tianjin, People’s Republic of China

    Mingyi Wu, Song Wang & Shimin Xu

  2. National Engineering Research Center for Distillation Technology, 300072, Tianjin, People’s Republic of China

    Hui Ding & Shimin Xu

Authors
  1. Mingyi Wu
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  2. Hui Ding
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  3. Song Wang
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  4. Shimin Xu
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Correspondence to Shimin Xu.

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Wu, M., Ding, H., Wang, S. et al. Optimizing Conditions for the Purification of Linoleic Acid from Sunflower Oil by Urea Complex Fractionation. J Am Oil Chem Soc 85, 677–684 (2008). https://doi.org/10.1007/s11746-008-1245-7

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  • DOI: https://doi.org/10.1007/s11746-008-1245-7

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