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The selective hydrogenation of linolenic acid
Author(s) -
Willard John G.,
Martinez Maria Luisa
Publication year - 1961
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/bf02638427
Subject(s) - double bond , selectivity , catalysis , solvent , chemistry , ultraviolet , photochemistry , ultraviolet light , organic chemistry , materials science , optoelectronics
The hydrogenated samples were analyzed by ultraviolet specconditions produced mostly nonselective hydrogenation. The variables of catalyst, catalyst concentration, solvent, temperature, and pressure have very little effect on the selectivity. Large differences were found in the relative reactivities of the three double bonds in methyl linoleate. It appears that the initial reaction strongly favors the 12 position assuming a limited amount of shifting of double bonds during hydrogenation. The solvent has an appreciable effect on this selectivity, but the other variables have only minor effects. The hydrogenated samples were analyzed by ultraviolet spectroscopy. Efforts to identify the location of the double bonds by oxidative methods were unsatisfactory. Preliminary studies on the possible use of nuclear spin resonance as analytical method in fatty acid analysis look promising.