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Comparison of Ethyl Acetate with Hexane for Oil Extraction from Various Oilseeds

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

The aim of the current research was to determine a less hazardous, cheaper and less toxic alternative solvent for hexane for extraction of oil from different oilseeds showing equivalent oil yield and oil quality. A full factorial design with three levels of extraction temperature (80, 100 and 120 °C) and three levels of extraction time (40, 65 and 90 min) with constant solvent to seed ratio value of 4:1 was used to extract the oil. Maximum oil was recovered from canola followed by flax, mustard and camelina. The oil content of canola was found in range of 21.08–36.44, and 25.12–40.38 % for hexane and ethyl acetate, respectively. The heating values of oil extracted from all oilseeds using hexane and ethyl acetate were found in the range of 38.04–39.98 and 37.98–39.37 MJ/kg, respectively. Least viscosity was found for flax seed using hexane followed by camelina, canola and mustard as compared to ethyl acetate. Viscosity of flax oil ranged from 27.23–37.19, and 31.16–55.52 cP for hexane and ethyl acetate solvents, respectively. Considering human safety, less environmental impact, comparable oil yield and quality parameters, ethyl acetate can be a promising alternative to hexane.

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Abbreviations

ASE:

Accelerated solvent extractor

Cn:

Canola

Cm:

Camelina

EA:

Ethyl acetate

Fx:

Flax

H:

Hexane

MC:

Moisture content

Mt:

Mustard

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Acknowledgments

The authors gratefully acknowledge the funding provided by Agricultural Experiment Station, College of Agriculture and Biological Sciences, South Dakota State University. We would also like to thank the funding agencies - NC Sun Grant, DoT, DoE, SD Oilseeds Initiative, Griffith Foundation for this research.

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Authors and Affiliations

  1. Agricultural and Biosystems Engineering Department, South Dakota State University, Brookings, SD, 57006, USA

    Umesh C. Lohani & K. Muthukumarappan

  2. National Corn-to-Ethanol Research Center, Southern Illinois University, Edwardsville, IL, 62025, USA

    Parisa Fallahi

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  1. Umesh C. Lohani
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  3. K. Muthukumarappan
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Correspondence to Umesh C. Lohani.

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Lohani, U.C., Fallahi, P. & Muthukumarappan, K. Comparison of Ethyl Acetate with Hexane for Oil Extraction from Various Oilseeds. J Am Oil Chem Soc 92, 743–754 (2015). https://doi.org/10.1007/s11746-015-2644-1

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