Cyclic fatty acids: Removal of aromatic acids formed during hydrogenation View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1966-08

AUTHORS

R. A. Eisenhauer, R. E. Beal, L. T. Black, J. P. Friedrich

ABSTRACT

Monomeric fatty acids derived from the alkali treatment of linseed oil at temperatures above 200C contain cyclic (1,2-disubstituted cyclohexadiene) and straight-chain fatty acids. Hydrogenation converts cyclic to liquid, saturated cyclic acids that can be recovered in a pure state by crystallization. During hydrogenation (palladium catalyst) some of the unsaturated cyclic acids form aromatic fatty acids by loss of hydrogen and under some conditions are not subsequently hydrogenated. It was necessary to establish conditions for complete hydrogenation since color and oxidative stability at high temperature are inversely related to aromatic content. Previously, the preparation of cyclic acids free of aromatic acids was by hydrogenation in the presence of a high concentration of acetic acid. A further study of reaction variables established conditions to make saturated cyclic fatty acids free of aromatic without acetic acid. Factors favoring the elimination of aromatic acids include a high catalyst concentration, high temperature and pressure, good hydrogen dispersion in the liquid and good agitation. More... »

PAGES

515-518

References to SciGraph publications

  • 1961-07. Liquid C-18 saturated acids derived from linseed oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1963-07. Determination of cyclic fatty acids by gas-liquid chromatography in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1962-10. Nitrogenous derivatives of cyclic fatty acids in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1962-03. Alkyd resins modified with cyclic fatty acids a preliminary evaluation in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1963-10. Methods for improving yields of cyclic acid from linseed oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1964-01. Cyclic fatty acids from linolenic acid in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1959-12. Cyclization of linolenic acid by alkali isomerization in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • 1963-04. Cyclic fatty acid yields from linseed oil in JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf02641279

    DOI

    http://dx.doi.org/10.1007/bf02641279

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1031476083

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/5945038


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