28304-66-7Relevant academic research and scientific papers
Preparation of New Solid Superbase and Its Catalityc Activity
Suzukamo, Gohfu,Fukao, Masami,Minobe, Masao
, p. 585 - 588 (1987)
A solid superbase whose basicity (H-) was higher than 37 was prepared by the successive treatment of γ-alumina with sodium hydroxyde and sodium at 280-350 deg C under nitrogen.The base was highly effective in the catalytic isomerization of 5-vinylbicyclohept-2-ene to 5-ethylidenebicyclohept-2-ene.
Superbase Character of Alumina loaded with Potassium by Impregnation from Ammoniacal Solution
Baba, Toshihide,Handa, Haruhisa,Ono, Yoshio
, p. 187 - 192 (1994)
Al2O3 has been loaded with potassium by impregnation from an ammoniacal solution and heated under vacuum at 573 K.The resulting catalyst showed extremely high catalytic activity for the isomerization of alkenes.These catalysts had much greater activity than that of Al2O3 loaded with alkali metals by vapour deposition.The isomerization, over K(NH3)/Al2O3, of pent-1-ene to pent-2-ene gave a 98percent yield in 6 min at 201 K.The temperature-programmed desorption and IR spectra of Al2O3 after impregnation indicated that the metal amide-like species formed on the alumina is a catalytically active species.Al2O3 loaded with KNH2 was found to be more active than K(NH3)/Al2O3 for the isomerization of 2,3-dimethylbut-1-ene.The basic strength of these catalysts was estimated to be at least H- = 37.
