Improvement of the Catalytic Performances of SBA-15 in the Formylation of Aniline upon the Introduction of Template-Free Nano-Faujasite in Its Synthesis Gel

摘要

Faujasite nanoparticles with average size of 10-40 nm were obtained without any organic structure directing agents (Green synthesis), then used as precursors for the synthesis of NaY/SBA-15 composites. Two types of composites were obtained with meso/micro porosity (C1 and C2).The inorganic salt, NH4F, has a crucial effect on their morphologies, therefore, their textural and catalytic properties have been mostly influenced. The resulting materials were characterized by X-ray Diffraction (XRD), N-2 sorption, Scanning Electron Microscopy (SEM) .The both composites have been successfully used as catalysts for the N-formylation reaction of aniline. As a result, N-phenylformamide was obtained with up to 90 % yield and 100 % selectivity at 50 degrees C in 4 h (solvent-free conditions) .The catalytic tests were monitored by gas chromatography (GC) and the nature of the products was confirmed by NMR.