Some practical aspects connected with the presence of calcium in soybean oils

A. Letan, A. Yaron

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Presence of calcium in crude and degummed soybean oils prevents complete elimination of phosphatides by hydration and enhances the formation of heavy precipitates. They block industrial centrifuges at the later stages of the refining processes. Industrially extracted degummed soybean oils contain appreciable amounts of calcium (ca. 100 ppm) and its source was traced to the processed soybeans. Various pre-extraction treatments of the soybeans in industry augment the calcium content in the oils, since crude Soxhlet-extracted soybean oils contained only 15 ppm calcium. Additions at the alkali-refining stages of EDTA or of polyphosphate, to stabilize aqueous suspensions which also contain calcium salts, are suggested as a partial remedy to the frequent blocking of the centrifuges.

Original languageEnglish
Pages (from-to)702
Number of pages1
JournalJournal of Oil & Fat Industries
Issue number12
StatePublished - 1 Dec 1972
Externally publishedYes

ASJC Scopus subject areas

  • General Chemical Engineering
  • Organic Chemistry


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