The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the cat...The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.展开更多
Different Michael addition reactions catalyzed by solid base K2O/γ-Al2O3 and KF/γ-Al2O3,MgO/γ-Al2O3 prepared by microwave irradiation method were reported in this paper.For the K2O/γ-Al2O3,not only good yield was ...Different Michael addition reactions catalyzed by solid base K2O/γ-Al2O3 and KF/γ-Al2O3,MgO/γ-Al2O3 prepared by microwave irradiation method were reported in this paper.For the K2O/γ-Al2O3,not only good yield was attained but also made the reaction of Acetonitrile that usually is regarded as inactive carbonion and α,β-unsaturated compound to carry out.The yield of Michael reaction of Ethyl acetoacetate and Crotonaldehyde catalyzed by KF/γ-Al2O3,MgO/γ-Al2O3,MgO/NaY all could reach to 80% and the latter could reach to 90%.At the same time,the catalysts of different content（the ratio of load）of MgO were also applied in this reaction,and it was found that the best content of MgO was 20%～25%.展开更多
文摘The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.
文摘Different Michael addition reactions catalyzed by solid base K2O/γ-Al2O3 and KF/γ-Al2O3,MgO/γ-Al2O3 prepared by microwave irradiation method were reported in this paper.For the K2O/γ-Al2O3,not only good yield was attained but also made the reaction of Acetonitrile that usually is regarded as inactive carbonion and α,β-unsaturated compound to carry out.The yield of Michael reaction of Ethyl acetoacetate and Crotonaldehyde catalyzed by KF/γ-Al2O3,MgO/γ-Al2O3,MgO/NaY all could reach to 80% and the latter could reach to 90%.At the same time,the catalysts of different content（the ratio of load）of MgO were also applied in this reaction,and it was found that the best content of MgO was 20%～25%.
