Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT

高等学校化学研究 ›› 2005, Vol. 21 ›› Issue (1): 83-87.

Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT

YANG Piao-ping, WANG Zhen-lü, YU Jian-feng, LIU Qing-sheng, XUE Bin, ZHANG Zuo-wang, WU Tong-hao

College of Chemistry, Jilin University, Changchun 130023, P. R. China

收稿日期:2004-02-18 出版日期:2005-01-24 发布日期:2011-07-27

Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT

YANG Piao-ping, WANG Zhen-lü, YU Jian-feng, LIU Qing-sheng, XUE Bin, ZHANG Zuo-wang, WU Tong-hao

College of Chemistry, Jilin University, Changchun 130023, P. R. China

Received:2004-02-18 Online:2005-01-24 Published:2011-07-27

摘要/Abstract

摘要： Mg/Al mixed oxides with molar ratios of 2_6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method.The effect of the composition of the mixed oxides on the physicochemical properties was studied by TPD, nitrogen sorption, XRD and TG-DTA characterization methods.The synthesis of o-phenylphenol(OPP) from a dimer(obtained from cyclohexanone condensation) was investigated over Pt/CHT catalysts and compared with those over Pt/MgO and Pt/Al₂O₃ catalysts.These catalysts show a high activity and selectivity for OPP, with a conversion reaching 93.8% and a selectivity reaching 87.9% in some experiments.For Pt/CHT_x catalysts, the calcined hydrotalcites exhibited strong base sites, which were necessary to catalyze the synthesis of OPP.

关键词: Hydrotalcite, CHT, OPP, Dimer dehydrogenation, n(Mg)/n(Al) ratio

Abstract: Mg/Al mixed oxides with molar ratios of 2_6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method.The effect of the composition of the mixed oxides on the physicochemical properties was studied by TPD, nitrogen sorption, XRD and TG-DTA characterization methods.The synthesis of o-phenylphenol(OPP) from a dimer(obtained from cyclohexanone condensation) was investigated over Pt/CHT catalysts and compared with those over Pt/MgO and Pt/Al₂O₃ catalysts.These catalysts show a high activity and selectivity for OPP, with a conversion reaching 93.8% and a selectivity reaching 87.9% in some experiments.For Pt/CHT_x catalysts, the calcined hydrotalcites exhibited strong base sites, which were necessary to catalyze the synthesis of OPP.

Key words: Hydrotalcite, CHT, OPP, Dimer dehydrogenation, n(Mg)/n(Al) ratio

YANG Piao-ping, WANG Zhen-lü, YU Jian-feng, LIU Qing-sheng, XUE Bin, ZHANG Zuo-wang, WU Tong-hao. Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT[J]. 高等学校化学研究, 2005, 21(1): 83-87.

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Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT

Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT

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