Variables affecting the yields of fatty esters from transesterified vegetable oils View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1984-10

AUTHORS

B. Freedman, E. H. Pryde, T. L. Mounts

ABSTRACT

Transesterification reaction variables that affect yield and purity of the product esters from cottonseed, peanut, soybean and sunflower oils include molar ratio of alcohol to vegetable oil, type of catalyst (alkaline vs acidic), temperature and degree of refinement of the vegetable oil. With alkaline catalysts (either sodium hydroxide or methoxide), temperatures of 60 C or higher, molar ratios of at least 6 to 1 and with fully refined oils, conversion to methyl, ethyl and butyl esters was essentially complete in 1 hr. At moderate temperatures (32 C), vegetable oils were 99% transesterified in ca. 4 hr with an alkaline catalyst. Transesterification by acid catalysis was much slower than by alkali catalysis. Although the crude oils could be transesterified, ester yields were reduced because of gums and extraneous material present in the crude oils. More... »

PAGES

1638-1643

References to SciGraph publications

  • 1963-05. The preparation of alkyl esters from highly unsaturated triglycerides in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1956-11. Esterification and interesterification in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1984-07. Thin layer chromatography/flame ionization analysis of transesterified vegetable oils in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1978-11. Interesterification of fats in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1956-03. Methanolysis of triglycerides in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1949-03. Modification of vegetable oils. VII. Alkali catalyzed interesterification of peanut oil with ethanol in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1954-11. Ester reactions of fatty materials in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1966-06. The preparation of alkyl esters from highly unsaturated triglycerides. II in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1944-05. A report on ester interchange in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
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    http://scigraph.springernature.com/pub.10.1007/bf02541649

    DOI

    http://dx.doi.org/10.1007/bf02541649

    DIMENSIONS

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