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
Efficient and selective production of 5-hydroxymethylfurfural(HMF) from glucose was achieved in the presence of zirconium phosphate(ZrPO) catalyst in a biphasic system.With the use of this catalyst,a high HMF yield of...Efficient and selective production of 5-hydroxymethylfurfural(HMF) from glucose was achieved in the presence of zirconium phosphate(ZrPO) catalyst in a biphasic system.With the use of this catalyst,a high HMF yield of 56.8% was obtained from glucose in a water-tetrahydrofuran(THF) biphasic system.Characterization results showed that such catalyst had weak to strong acid sites and contained both Lewis and Br?nsted acid sites.The results of comparative experiments over some other solid acid catalysts demonstrated that the Lewis acid sites on the ZrPO catalyst played a crucial role in the isomerization of glucose to fructose and the Br?nsted ones were active in the dehydration of generated fructose to HMF.Moreover,less levulinic acid(LA) and formic acid(FA)(0.5%) were detected in the reaction solution,indicating that this ZrPO catalyst exhibited high selectivity towards the formation of HMF.Furthermore,the ZrPO catalyst was very stable and could maintain its activity after being used for six times.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%.
基金supported financially by the National Science Foundation of China(No.21273071)the Science and Technology Commission of Shanghai Municipality(13520711400,13JC1401902,10dz2220500)the Fundamental Research Funds for the Central Universities of China and the SINOPEC project(No.115046)
文摘Efficient and selective production of 5-hydroxymethylfurfural(HMF) from glucose was achieved in the presence of zirconium phosphate(ZrPO) catalyst in a biphasic system.With the use of this catalyst,a high HMF yield of 56.8% was obtained from glucose in a water-tetrahydrofuran(THF) biphasic system.Characterization results showed that such catalyst had weak to strong acid sites and contained both Lewis and Br?nsted acid sites.The results of comparative experiments over some other solid acid catalysts demonstrated that the Lewis acid sites on the ZrPO catalyst played a crucial role in the isomerization of glucose to fructose and the Br?nsted ones were active in the dehydration of generated fructose to HMF.Moreover,less levulinic acid(LA) and formic acid(FA)(0.5%) were detected in the reaction solution,indicating that this ZrPO catalyst exhibited high selectivity towards the formation of HMF.Furthermore,the ZrPO catalyst was very stable and could maintain its activity after being used for six times.
