Depleted Uranium as Catalyst for Hydrocracking Shale Oil

Divergent uranium- versus phosphorus-based reduction of Me3SiN3 with steric modification of phosphido ligands

“…The other reductive chemistry seen with the actinides is with redox-active ligands, 7,8 Scheme 1, 9,10 with no observed change in the oxidation state of the metal. Since two-electron metal-based reactions are important in catalysis 11,12 and small molecule activation, 13,14 it is of interest to have a greater understanding of both the oxidative and reductive processes.…”

Depleted uranium catalysts for chlorine production

“…[4][5][6] Later efforts extended the scope of uranium-catalysed transformations to comprise the oxidative destruction of volatile chlorinated hydrocarbons, 7,8 the oxidative coupling of ethylene, acetylene, and acetaldehyde, 3 the esterication of formaldehyde, 3 and NO x reduction. 9 Relevantly, uranium-based materials were once used in industry for the hydrocracking of shale oil (UO 3 /Al 2 O 3 , UO 3 /CoMoO 4 ) 10 and in the ammoxidation of propylene to acrylonitrile (USb x O y ). [11][12][13] Natural uranium consists of three isotopes, 238 U, 235 U, and 234 U, in the relative abundance of 99.275, 0.720, and 0.005%, respectively.…”

Chemistry of Actinide Centers in Heterogeneous Catalytic Transformations of Small Molecules

“…The application of uranium-containing compounds in heterogeneous catalysis was reviewed by Taylor et al in 2009 and by Ismagilov et al in 2013; however, a large body of data has become available since then and some of the highlights are summarized in the following account. Whereas Taylor et al focused on uranium oxides and their applications in oxidation, − reduction, and steam forming reactions, Ismagilov reviewed solid-supported, uranium oxide composites and uranium-containing compounds for catalytic reactions in organic synthesis, − syngas production, , Fischer–Tropsch and hydrocracking processes, hydrodesulfurization, and oxidation and reduction reactions . Because of the thermal stability and resistance to catalytic poisons, such as sulfur, water, and chlorine, the application of uranium oxides for purification of waste gases polluting the environment was examined heavily in the past decades. , As the present Review mainly focuses on recent developments in small molecule activation using actinide containing compounds, several interesting publications and break-through observations on catalytic reactions such as the reduction of 4-nitrophenol using urania-palladium-graphene nanohybrids, the oxidation of chlorobenzene and benzyl alcohols, ,,,,− the degradation of Rhodamine B, or Suzuki–Miyaura cross-coupling reactions of aryl halides will not be reviewed herein.…”

“…The application of uranium-containing compounds in heterogeneous catalysis was reviewed by 127 and steam forming reactions, 128 Ismagilov reviewed solid-supported, uranium oxide composites and uranium-containing compounds for catalytic reactions in organic synthesis, 129−132 syngas production, 133,134 Fischer− Tropsch 135 and hydrocracking processes, 136 hydrodesulfurization, 137 and oxidation 138 and reduction reactions. 139 Because of the thermal stability and resistance to catalytic poisons, such as sulfur, water, and chlorine, the application of uranium oxides for purification of waste gases polluting the environment was examined heavily in the past decades.…”