12‐Tungstophosphoric acid supported on aerosil silica and silica‐coated γ‐Fe2O3 nanoparticles was prepared and characterized using transmission electron microscopy,scanning electron microscopy,and inductively coup...12‐Tungstophosphoric acid supported on aerosil silica and silica‐coated γ‐Fe2O3 nanoparticles was prepared and characterized using transmission electron microscopy,scanning electron microscopy,and inductively coupled plasma atomic emission spectroscopy.The catalytic activity of the two prepared catalysts was compared in the synthesis of 1,8‐dioxo‐9,10‐diaryldecahydroacridines in water.12‐Tungstophosphoric acid was highly dispersed on the silica‐coated γ‐Fe2O3 nanoparticles and showed higher activity and a higher reuse number compared with the acid supported on aerosil silica.The catalyst could be recovered simply by using an external magnetic field and could be reused several times without appreciable loss of its catalytic activity.展开更多
A continuous mixed flow reactor, in which the supported heteropolyacid catalyst HRP-12 was suspended, was adopted in the experiment. Experimental data were used in parameters estimation for kinetics equation of benzen...A continuous mixed flow reactor, in which the supported heteropolyacid catalyst HRP-12 was suspended, was adopted in the experiment. Experimental data were used in parameters estimation for kinetics equation of benzene alkylation with linear olefin. Parameters, including reaction rate constant, activation energy and reaction order in olefin molar concentration, were determined as 13530s-1, 48743Jmol-1 and 1 respectively. The kinetic equation for benzene alkylation with linear olefin was thus established. Statistics test and model prediction have shown that the kinetics equation is highly credible under the condition α=0.05 and well corresponds with reaction principle.展开更多
基金supported by Razi University Research Council and Iran National Science Foundation
文摘12‐Tungstophosphoric acid supported on aerosil silica and silica‐coated γ‐Fe2O3 nanoparticles was prepared and characterized using transmission electron microscopy,scanning electron microscopy,and inductively coupled plasma atomic emission spectroscopy.The catalytic activity of the two prepared catalysts was compared in the synthesis of 1,8‐dioxo‐9,10‐diaryldecahydroacridines in water.12‐Tungstophosphoric acid was highly dispersed on the silica‐coated γ‐Fe2O3 nanoparticles and showed higher activity and a higher reuse number compared with the acid supported on aerosil silica.The catalyst could be recovered simply by using an external magnetic field and could be reused several times without appreciable loss of its catalytic activity.
文摘A continuous mixed flow reactor, in which the supported heteropolyacid catalyst HRP-12 was suspended, was adopted in the experiment. Experimental data were used in parameters estimation for kinetics equation of benzene alkylation with linear olefin. Parameters, including reaction rate constant, activation energy and reaction order in olefin molar concentration, were determined as 13530s-1, 48743Jmol-1 and 1 respectively. The kinetic equation for benzene alkylation with linear olefin was thus established. Statistics test and model prediction have shown that the kinetics equation is highly credible under the condition α=0.05 and well corresponds with reaction principle.
