JTek 69-2014-25

Highly Active Aluminosilicates with a Hierarchical Porous Structure for
Acetalization of 3,4-dimethoxybenzaldehyde

We report the synthesis of highly active mesoporous aluminosilicate for the acetalization of 3,4-
dimethoxybenzaldehyde with propylene glycol. The existing synthesis methods for aluminosilicate and
ZSM-5 were modified to produce aluminosilicate material with hierarchical porous structure. A
combination of two structure directing agents, tetrapropylammonium hydroxide (TPAOH) and
cetyltrimethylammonium bromide (CTAB), produced a highly active aluminosilicate framework that
provides a wide access for bulky reactants and strong acid sites to catalyse the reaction. The pore structure
and the strength of the acid sites were crucial for high conversion of 3,4-dimethoxybenzaldehyde.