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The migration of double bonds during the isomerization of methyl linoleate with palladium on carbon catalyst
Author(s) -
Takemura K. H.,
Goldblatt L. A.
Publication year - 1957
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02637929
Subject(s) - isomerization , catalysis , chemistry , double bond , palladium , photochemistry , polymerization , absorption (acoustics) , polymer chemistry , carbon fibers , organic chemistry , polymer , composite number , materials science , composite material
Summary The isomerization of methyl linoleate by heating with palladium on carbon catalyst gave an initial rapid rise in the degree of conjugation which reached a maximum and then gradually decreased. The maximum conjugation obtained was about 24% after 4 hrs. of heating at 200±5°C. with 25% by weight of catalyst. Ultraviolet absorption spectra did not indicate the presence of any cyclized aromatic components even after 46 hrs. of heating at 200°C. but showed the formation of aromatics at 250°C. The limit of conjugation obtained is a result of random migration of the olefinic bonds rather than dimerization or polymerization reactions.