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篇目详细内容 |
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【篇名】 |
Synthesis of magnetic Pb/Fe3O4/SiO2 and its catalytic activity for propylene carbonate synthesis via urea and 1,2-propylene glycol |
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【刊名】 |
Frontiers of Chemical Engineering in China |
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【刊名缩写】 |
Front. Chem. Eng. China |
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【ISSN】 |
1673-7369 |
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【EISSN】 |
1673-7474 |
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【DOI】 |
10.1007/s11705-009-0055-2 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
3
卷2期 |
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【页码】 |
215-218
页,共
4
页 |
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【作者】 |
Hualiang AN;
Xinqiang ZHAO;
Zhiguang JIA;
Changcheng WU;
Yanji WANG;
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【关键词】 |
Pb/Fe3O4/SiO2 magnetic particle; urea; 1; 2-propylene glycol; propylene carbonate |
【摘要】 |
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To facilitate the recovery of Pb/SiO2 catalyst, magnetic Pb/Fe3O4/SiO2 samples were prepared separately by emulsification, sol-gel and incipient impregnation methods. The catalyst samples were characterized by means of X-ray diffraction and N2 adsorption-desorption, and their catalytic activity was investigated in the reaction for synthesizing propylene carbonate from urea and 1,2-propylene glycol. When the gelatin was applied in the preparation of Fe3O4 at 60°C and the pH value was controlled at 4 in the preparation of Fe3O4/SiO2, the Pb/Fe3O4/SiO2 sample shows good catalytic activity and magnetism. Under the reaction conditions of a reaction temperature of 180°C, reaction time of 2h, catalyst percentage of 1.7 wt-% and a molar ratio of urea to PG of 1∶4, the yield of propylene carbonate attained was 87.7%. |
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