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, Epoh NG

Pages : 568-581

View : 26 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Zeolite Cs-ABW nanocatalyst has been hydrothermally synthesized without using any harmful organic template. The zeolite nanocrystal with very high solid yield insert ignore into journalissuearticles values(81.88%); can be obtained within 60 min and at 180 $^{\circ}$C insert ignore into journalissuearticles values(∼ 20 atm);, conditions that are much faster and gentler than the existing synthesis methods. The orthorhombic Cs-ABW nanocrystals insert ignore into journalissuearticles values(mean size of 32 nm); have high aluminum content insert ignore into journalissuearticles values(Si/Al ratio $=$ 1.14); and possess high basicity. The nanocrystals also exhibit better catalytic activity than conventional homogeneous catalysts in the Henry insert ignore into journalissuearticles values(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