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Changes in thermal and optical properties of butteroil on hydrogenation
Author(s) -
Yoncoskie R. A.,
Holsinger V. H.,
Posati L. P.,
Pallansch M. 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/bf02544375
Subject(s) - degree of unsaturation , melting temperature , catalysis , gauge (firearms) , analytical chemistry (journal) , materials science , kinetic energy , chemistry , thermodynamics , polymer chemistry , organic chemistry , composite material , metallurgy , physics , quantum mechanics
Abstract The hydrogenation of butteroil was studied at varying conditions of temperature, hydrogen pressure and catalyst concentration. The calculation of reaction rates employing the first order rate equation yielded a single kinetic slope for hydrogenations performed at 60 psi (gauge), whereas a double slope was obtained at 15 psi (gauge). Near infrared spectral data of hydrogenated samples at 4600 cm −1 indicated good quantitative correlation with iodine values. Differential thermal analysis showed progressive disappearance of low‐melting groups with concomitant appearance of high‐melting groups as the hydrogenation time was progressively increased. Heats of melting, calculated from thermogram areas, showed a systematic increase as the amount of unsaturation was gradually reduced.