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High oleic oils by selective hydrogenation of soybean oil
Author(s) -
Popescu Ovidiu,
Koritala Sambasivarao,
Dutton H. J.
Publication year - 1969
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/bf02541217
Subject(s) - oleic acid , copper , soybean oil , stearic acid , iodine value , citric acid , catalysis , diene , double bond , linolenate , chemistry , peanut oil , organic chemistry , acid value , food science , fatty acid , biochemistry , natural rubber , raw material
High oleic (monoene) oils were obtained from soybean oil by selective hydrogenation with copper catalysts. A mixture of nickel and copper chromite catalyst had activity suitable for producing the high monoene oils. A new catalyst (copper‐on‐Cab‐O‐Sil) prepared in the Laboratory was more active than commercial copper catalysts. Hydrogenated oils contained 61–72% monoenoic and 14–24% dienoic acids, and there was essentially no increase in stearic acid. The trans ‐isomer content of these oils varied between 17% to 32%. Double bonds in the monoene were distributed along the molecule from C 6 to C 15 , but were located preferentially in the C 9 position for the cis ‐monoene and in the C 10 and C 11 positions for the trans ‐monoene. When the iodine value of these high monoene oils was about 90–95, they remained liquid above 28 C. Citric acid treatment reduced the copper content of hydrogenated oils to a level that was comparable to that of the original soybean oil.