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Filtration-extraction of flaxseed as affected by preparation variables

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Journal of the American Oil Chemists Society

Summary

The data presented show that the filtration-extraction process can be applied to the extraction of oil from flaxseed. General conditions for preparing the material and for extraction have been established. Adequate comminution, cooking, and crisping yielded materials having necessary characteristics for the successful application of the filtration-extraction process. Mass velocities in excess of 2,000 and residual lipides contents below 1% were obtained when these materials were slurried and extracted at slightly elevated temperatures (130°F.).

The conditions of rolling had an appreciable effect upon the efficiency of extraction of flaxseed. One pass through five-high rolls with clearances of 0.002 in., 0.002 in., 0.002 in., and 0.000 in. between respective rolls proved satisfactory. Apparent optimum cooking moisture levels for efficient oil extraction fall between 17 and 24% maximum initial, and 8.0 to 10.5% as discharged from the cooker. Mass velocities were significantly lowered when maximum initial cooking moisture contents were below 14% since at these moisture levels it becomes necessary to reduce the moisture content to below 8%, as discharged from the cooker, to achieve suitable cooking. At these low moisture levels crisping by evaporative cooling is not effective.

The versatility of the filtration-extraction process, which had been previously adapted to the extraction of oil from cottonseed, soybeans, sesame seed, peanuts, and rice bran, has been extended, with some minor but important modifications in the preparation and extraction conditions, to the extraction of oil from flaxseed.

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Authors and Affiliations

  1. Southern Regional Research Laboratory, New Orleans, Louisiana

    N. B. Knoepfler, J. J. Spadaro, E. J. McCourtney & H. L. E. Vix

Authors
  1. N. B. Knoepfler
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  2. J. J. Spadaro
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  3. E. J. McCourtney
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  4. H. L. E. Vix
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Additional information

One of the laboratories of the Southern Utilization Research Branch, Agricultural Research Service, U. S. Department of Agriculture.

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Knoepfler, N.B., Spadaro, J.J., McCourtney, E.J. et al. Filtration-extraction of flaxseed as affected by preparation variables. J Am Oil Chem Soc 33, 272–276 (1956). https://doi.org/10.1007/BF02630859

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  • DOI: https://doi.org/10.1007/BF02630859

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