Effect of degumming conditions on removal and quality of soybean lecithin View Full Text


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Article Info

DATE

1981-10

AUTHORS

G. R. List, J. M. Avellaneda, T. L. Mounts

ABSTRACT

A commercially extracted crude soybean oil (570 ppm phosphorus, 1.74% acetone insolubles) was degummed in the laboratory under a wide range of reaction conditions (water concentration, temperature, time and agitation). The reaction conditions were correlated with phosphorus removal from the oil as well as with color and acetone-insoluble content of the gum fraction. Efficiency of removal of phosphorus-containing compounds was independent of time, temperature and agitation. Water concentration had the most significant effect on removal of phosphorus from crude soybean oil. Some darkening of the lecithin was observed at temperatures above 60 C and with increased agitation. Individual conditions of time and temperature had relatively little effect on the acetone-insoluble content of the gums. Low agitation rates and water in concentrations of other than 2% (either more or less) entrained excessive amounts of oil in the gums. Under our experimental conditions, the optimal conditions with respect to phosphorus removal, lecithin color and acetone-insoluble content are estimated to be: time-short (15 min); agitation-moderate to rapid (400 rpm); temperature-60 C; water concentration-2% or an amount close to the phosphatide content of the crude oil. Bleaching with hydrogen peroxide to produce single-bleached lecithin was investigated. From limited data, it appears that when degumming and bleaching are performed simultaneously, effectiveness of bleaching is a function of peroxide concentration and time. Thus, longer degumming times are required to prepare bleached lecithin compared to unbleached products. More... »

PAGES

892-898

References to SciGraph publications

  • 1979-10. About the conversion factor of phosphorus to phosphatides in soybean oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1978-06. Factor for converting elemental phosphorus to acetone insolubles in crude soybean oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1976-06. Degumming and refining practices in Europe in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1976-06. Degumming and refining practices in the U.S. in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1978-02. Removal of phosphorus and iron by commercial degumming of soybean oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1976-06. Lecithin production and properties in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1976-01. Soybean lecithin processing unit operations in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1974-08. New technology in centrifugal processing of fats and oils in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
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    http://scigraph.springernature.com/pub.10.1007/bf02659653

    DOI

    http://dx.doi.org/10.1007/bf02659653

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1033864528


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