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Industrial hydrogenation of cottonseed oil: A compositional study
Author(s) -
Sreenivasan B.,
Holla K. S.,
Ichaporia M. B.
Publication year - 1966
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/bf02682420
Subject(s) - cottonseed oil , chemistry , glyceride , cis–trans isomerism , composition (language) , cottonseed , organic chemistry , infrared spectrophotometry , selectivity , gas chromatography , fatty acid , chromatography , food science , catalysis , linguistics , philosophy
Intermediate samples during a typical plant hydrogenation of cottonseed oil for vanaspati (shortening) manufacture have been examined for their fatty acid composition by gas‐liquid chromatography and trans isomers content by infrared spectrophotometry. In the initial stages, hydrogenation of linoleate proceeds almost exclusively in preference to that of oleate. During this period, trans isomers are also formed at a rapid rate. It has been proposed that this high selectivity and high trans isomer formation are linked to the formation of conjugated diene from linoleate as a first step in the hydrogenation. It has been found that a linear relationship exists between the linoleate content and the trans isomers content or the k 10.38 ॖ values of the glycerides. The practical utility of this plot is that it can be employed as a guide to arrest the process at any desired linoleate level.