Study On Synthesis And Application Of Organized Mesopous Alumina

In this paper, organized mesoporous alumina was synthesized by precipitation in the in Rotating Packed Bed with the inexpensive inorganic aluminium salts and the salvolatile as precipitator, the PEG 1540 as template. This method successfully achieved the preparation of organized mesopous alumina by precipitation in bulk trial. The surface area of organized mesopous alumina reached above 250 m2\g, and the pore diameter was between 2-4nm. The channel of the sample the was wormhole and uniform in size and shape.In this paper, the excellent synthesis conditions of organized mesopous alumina was studied from the data of the structure and shape by changing the reaction conditions. Besides, the pore diameter can be adjusted to the different of polymerization degree of the template.The lead ion adsorption behavior was studied by the synthesized ordered mesoporous alumina as adsorbent. The adsorption results show that the adsorption process of Pb2+ was quantitative, and it coincided with Freundlich adsorption isotherm equation. Pb2+ adsorption rate increased with the pH value of the solution. Using the ordered mesoporous alumina andγ-Al2O3 as the carrier, the lead metal catalyst was synthesized by the excessive impregnation method. The two kinds of catalyst activity were evaluated by the paldehyde ammonia condensation reaction to synthesize pyridine. The synthesis results show that:more lead metal can be loaded on the surface of the ordered mesoporous alumina and be dispersed well; the pore diameter distribution of the mesoporous alumina catalyst was narrow, and its shape and size was uniform; the catalytic activity of the ordered mesoporous alumina was prior to theγ-Al2O3 catalyst.