Res. Chem. Intermed.
, Vol. 32, No. 9, pp. 795–816 (2006)
Also available online - www.brill.nl/rci
High-selectivity hydrogenation of cinnamaldehyde over
platinum supported on aluminosilicates
, PETR KA
, VÁCLAV HULÍNSKÝ
and DMITRY YU. MURZIN
Laboratory of Industrial Chemistry, Process Chemistry Centre, Åbo Akademi University,
Department of Organic Technology, Institute of Chemical Technology, Prague, Czech Republic
Department of Glass and Ceramics, Institute of Chemical Technology, Prague, Czech Republic
Received 4 January 2006; accepted 7 April 2006
Abstract—This work studies liquid-phase hydrogenation of cinnamaldehyde to cinnamylalcohol over
Pt/K-10 and ion-exchanged Pt/Na-Y. The experiments show the highest selectivity of 78% for Pt/K-10
and 92% for the Pt/Na-Y. By careful analysis, characterisation and changing reaction conditions it was
attempted to cover key parameters possibly responsible for the high selectivity. The parameters are
described and discussed in detail.
Keywords: Cinnamaldehyde hydrogenation; cinnamylalcohol; aluminosilicates; montmorillonite;
K-10; LZ-Y52; Pt/Y catalyst.
Selective reduction of unsaturated aldehydes to unsaturated alcohols is a commer-
cially important reaction. Cinnamaldehyde is a conventional test substrate and the
corresponding cinnamylalcohol can be directly used as a valuable product, or as an
intermediate in the synthesis of ﬁne chemicals [1–3].
The traditional methods for the selective reduction of unsaturated aldehydes
are based on the application of chemical reducing agents such as aluminum
isopropoxide (Meerwein-Ponndorf-Verley reaction). The main advantage of such
processes is the high yield (about 85–90%) of the unsaturated alcohols [4, 5], while
the main drawback is the cost. An feasible alternative might be represented by
Despite the apparent advantages of the heterogeneous approach, the selectivity
towards the unsaturated alcohols is lower being limited by the thermodynamic
To whom correspondence should be addressed. E-mail: Jan.Hajek@biw.kuleuven.be