CYCLIC ACETALIZATION OF FURFURAL ON POROUS ALUMINOSILICATE ACID CATALYSTS
ABSTRACT: Porous
aluminosilicate materials included microporous and mesoporous ZSM-5,
hierarchical aluminosilicates, and mesoporous aluminosilicate were tested for
acetalization of furfural (furan-2-carbaldehyde) with propylene glycol. The
existing synthesis methods for aluminosilicate and ZSM-5 were modified to
produce aluminosilicate material with hierarchical porous structure. Catalytic
activity in acetalization of furfural by propylene glycol were conducted by
refluxed of the mixture of furfural, propylene glycol and catalyst, using
toluene as solvent and nitrobenzene as internal standard, at 106 °C for 4 h.
The result showed that a combination of two structure directing agents,
tetrapropylammonium hydroxide (TPAOH) and cetyltrimethylammonium bromide (CTAB)
and modification of catalytic crystallization produced an active
aluminosilicate framework that provides a wide access for a bulky reactants and
strong acid sites to catalyze the reaction. The pore structure and the strength
of the Brønsted acid sites were crucial for the high conversion of furfural to
produce a cyclic acetal.
Author: Hartati, Didik Prasetyoko, Mardi Santoso
Journal Code: jpkimiagg160091
