Removal of copper from hydrogenated soybean oil View Full Text


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Article Info

DATE

1969-09

AUTHORS

R. E. Beal, K. J. Moulton, H. A. Moser, L. T. Black

ABSTRACT

Hydrogenation with a copper-chromite catalyst at 170 C, 30 psi, increased the copper content of a refined, bleached soybean oil from 0.02 to as much as 3.8 ppm. Removing residual copper from soybean oil is essential to the successful use of copper catalysts for selective hydrogenation. Various methods were examined to remove this copper, including alkali refining, bleaching, acid washing, citric acid treatment and cation-exchange resin treatment. Properly conducted, each of the methods except alkali refining gives 95% or higher removal of copper introduced during hydrogenation. Ion exchange appears to be the most economical, but addition of about 0.01% citric acid during deodorization may be needed to inactivate traces of unremoved copper. Soybean oil hydrogenated with a copper-chromite catalyst, bleached or treated with an ion-exchange resin and deodorized with 0.01% citric acid added had low AOM peroxide values and acceptable flavor scores after eight days at 60 C which indicate that removal of residual copper from the oil should be adequate for the production of stable oils low in linolenic acid content. More... »

PAGES

498-500

References to SciGraph publications

  • 1965-04. Trace elements in edible fats. IX. Influence of demetalization on the oxidative and flavor stabilities of soybean oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1968-12. Determination of copper in edible soybean oils in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1967-02. Selective hydrogenation of soybean oil in the presence of copper catalysts in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1966-09. Selective hydrogenation of soybean oil. II. Copper-chromium catalysts in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1951-02. The flavor problem of soybean oil. VII. Effect of trace metals in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
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    http://scigraph.springernature.com/pub.10.1007/bf02544377

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    http://dx.doi.org/10.1007/bf02544377

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