Synthesis of fatty alcohol mixtures from oleochemicals in supercritical fluids
2000
Hydrogenation of various types of oleochemicals is a major
unit operation in industry. Traditional methods utilize batch, stirred
reactor operation resulting in long reaction times and excessive use of
catalyst and hydrogen. In this study, reduction of fatty acid methyl esters
(FAME) to fatty alcohol mixtures in two different types of supercritical
media (H2/CO2 and
H2/C3H8) were compared using two different
hydrogenation catalysts. High and rapid conversions are achieved at the
highest experimental temperature (250 °C) and at a hydrogenation mole
fraction of 0.25. The described hydrogenation methods has been coupled with
an enzymatic-catalyzed transesterification to yield a novel sequential two
step synthetic procedure, which permits high fatty alcohol yields to be
achieved directly from soybean oil.
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