Preparation of SiO2–Al2O3 and Its Supported Co3O4 Catalysts for Nitrosation of Cyclohexane
Preparation of SiO2–Al2O3 and Its Supported Co3O4 Catalysts for Nitrosation of Cyclohexane
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DOI：
10.1007/s10562-010-0306-3
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发表时间：
2010-02
影响因子：
2.8
通讯作者：
Pingle Liu;Huan Xie;K. You;F. Hao;Xiaofeng Li;He'an Luo
中科院分区：
文献类型：
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作者：
Pingle Liu;Huan Xie;K. You;F. Hao;Xiaofeng Li;He'an Luo
摘要 采用溶胶-凝胶法制备了非晶态SiO2-Al2O3，采用浸渍法制备了SiO2-Al2O3负载氧化钴。这些材料通过BET、XRD、TPD和FT-IR进行了表征。评价了 SiO2-Al2O3 和 Co3O4/SiO2-Al2O3 催化剂在发烟硫酸存在下环己烷与亚硝酰硫酸亚硝化反应的活性。结果表明，SiO2-Al2O3和Co3O4/SiO2-Al2O3能够有效催化该亚硝化反应。 Co3O4/SiO2-Al2O3 的转化率更好，ε-己内酰胺的转化率为 11.93%，选择性为 54.68%。这一发现建立了一种从环己烷一锅法合成ε-己内酰胺的潜在方法。具有潜在的应用前景和突出的理论意义。 图文摘要 非晶态SiO2-Al2O3及其负载的Co3O4催化剂的制备和表征。这些催化剂用于在发烟硫酸存在下催化环己烷与亚硝酰硫酸的反应。结果表明，Co3O4/SiO2-Al2O3 的转化率较好，ε-己内酰胺的转化率为 11.93%，选择性为 54.68%。这一发现建立了一种从环己烷一锅法合成ε-己内酰胺的潜在方法。
AbstractAmorphous SiO2–Al2O3was prepared by sol–gel method and cobalt oxide supported on SiO2–Al2O3was prepared by impregnation method. These materials were characterized by BET, XRD, TPD and FT-IR. The activity of SiO2–Al2O3and Co3O4/SiO2–Al2O3catalysts for nitrosation of cyclohexane with nitrosyl sulfuric acid in the presence of fuming sulphuric acid was evaluated. The results indicate that SiO2–Al2O3and Co3O4/SiO2–Al2O3can catalyze efficiently this nitrosation reaction. And Co3O4/SiO2–Al2O3gave better results with 11.93% of conversion and 54.68% of selectivity to ε-caprolactam. This discovery establishes a potential method for one-pot synthesis of ε-caprolactam from cyclohexane. It may be of potential application prospect and of prominent theoretical significance.Graphical AbstractAmorphous SiO2–Al2O3and its supported Co3O4catalysts were prepared and characterized. These catalysts were employed to catalyze the reaction of cyclohexane with nitrosyl sulfuric acid in the presence of fuming sulphuric acid. It indicates that Co3O4/SiO2–Al2O3gave better results with 11.93% of conversion and 54.68% of selectivity to ε-caprolactam. This discovery establishes a potential method for one-pot synthesis of ε-caprolactam from cyclohexane.