The title catalyst was prepared by the sol gel method. The surface composite, structure, specific area and catalytic behavior have been investigated by IR, BET, XRD, TEM techniques. The results showed that the catalys...The title catalyst was prepared by the sol gel method. The surface composite, structure, specific area and catalytic behavior have been investigated by IR, BET, XRD, TEM techniques. The results showed that the catalyst is an amorphous composed of FePO 4 and AlPO 4 with specific area about 238 m 2/g and average granule size less than 10 nm. Under proper reaction conditions the conversion of 1,2 dichloropropane was more than 64% and the selectivity to propylene oxide was more than 79%.展开更多
An experiment was conducted to examine the role of Mn in P fixation through comparing with Al and Fe. Hydroxides and oxides of Al, Fe and Mn were prepared in lab under opened and closed conditions to react with phosph...An experiment was conducted to examine the role of Mn in P fixation through comparing with Al and Fe. Hydroxides and oxides of Al, Fe and Mn were prepared in lab under opened and closed conditions to react with phosphate. The newly formed Mn hydroxide showed the strongest P-fixing abilityl even several times higher than Fe hydroxide, but became the lowest rapidly due to ageing when exposed to air. Mn oxide showed the lowest p-fixing ability. Therefore, a sound consideration on P fixation should be based on both quantities and p-fixing abilities of the compounds of Fe, Al and Mn. The importance of Mn on P availability should receive more attention especially under oxidation-reduction dynamic conditions.展开更多
文摘The title catalyst was prepared by the sol gel method. The surface composite, structure, specific area and catalytic behavior have been investigated by IR, BET, XRD, TEM techniques. The results showed that the catalyst is an amorphous composed of FePO 4 and AlPO 4 with specific area about 238 m 2/g and average granule size less than 10 nm. Under proper reaction conditions the conversion of 1,2 dichloropropane was more than 64% and the selectivity to propylene oxide was more than 79%.
文摘An experiment was conducted to examine the role of Mn in P fixation through comparing with Al and Fe. Hydroxides and oxides of Al, Fe and Mn were prepared in lab under opened and closed conditions to react with phosphate. The newly formed Mn hydroxide showed the strongest P-fixing abilityl even several times higher than Fe hydroxide, but became the lowest rapidly due to ageing when exposed to air. Mn oxide showed the lowest p-fixing ability. Therefore, a sound consideration on P fixation should be based on both quantities and p-fixing abilities of the compounds of Fe, Al and Mn. The importance of Mn on P availability should receive more attention especially under oxidation-reduction dynamic conditions.
