Organotemplate-free Cs-ABW nanozeolite as highly reactive and recyclable catalyst for Henry reaction between benzaldehyde and nitroethane

Authors

TAMARA MAHMOUD ALI GHREAR
KA LUN WONG
SOON HUAT TAN
TAU CHUAN LING
HUSSEIN AWALA
ENGPOH NG

DOI

10.3906/kim-1808-78

Abstract

Zeolite Cs-ABW nanocatalyst has been hydrothermally synthesized without using any harmful organic template. The zeolite nanocrystal with very high solid yield (81.88%) can be obtained within 60 min and at 180 $^{\circ}$C (∼ 20 atm), conditions that are much faster and gentler than the existing synthesis methods. The orthorhombic Cs-ABW nanocrystals (mean size of 32 nm) have high aluminum content (Si/Al ratio $=$ 1.14) and possess high basicity. The nanocrystals also exhibit better catalytic activity than conventional homogeneous catalysts in the Henry (nitroaldol) reaction of benzaldehyde with nitroethane under microwave heating conditions. The nanocatalyst does not suffer from coking and leaching problems. It can be reused without loss of reactivity even after five consecutive runs under the described reaction conditions.

Keywords

Cs-ABW nanozeolite, template-free hydrothermal synthesis, solid base catalyst, Henry reaction, microwave heating

First Page

568

Last Page

581

Recommended Citation

GHREAR, TAMARA MAHMOUD ALI; WONG, KA LUN; TAN, SOON HUAT; LING, TAU CHUAN; AWALA, HUSSEIN; and NG, ENGPOH (2019) "Organotemplate-free Cs-ABW nanozeolite as highly reactive and recyclable catalyst for Henry reaction between benzaldehyde and nitroethane," Turkish Journal of Chemistry: Vol. 43: No. 2, Article 17. https://doi.org/10.3906/kim-1808-78
Available at: https://journals.tubitak.gov.tr/chem/vol43/iss2/17