Abstract:
Disclosed are a process for producing a supported ruthenium oxide excellent in thermal stability and catalyst lifetime, and a process for stably producing chlorine by the use of the supported ruthenium oxide obtained by the above-described process, for a longer time. The process for producing a supported ruthenium oxide comprises the steps of supporting a ruthenium compound on a powdery titania carrier, and calcining the powdery titania carrier with the ruthenium compound thereon, under an atmosphere of an oxidizing gas, wherein the powdery titania carrier comprises titania and silica supported on the titania, and wherein a ratio of rutile type titania to total of the rutile type titania and anatase type titania in the powdery titania carrier is 50% or more, when measured by the X-ray diffraction method. Chlorine is produced by oxidizing hydrogen chloride with oxygen in the presence of the supported ruthenium oxide thus produced, as a catalyst.
Abstract:
The invention aims at producing metal oxide nanoparticles and carbon carrying metal oxide nanoparticles supported thereon in a highly dispersed state by an accelerated liquid-phase chemical reaction and providing electrodes containing the carbon and electrochemical devices provided with the electrodes. The accelerated liquid-phase chemical reaction is attained by applying a shear stress and a centrifugal force to reactants in a rotating reactor in course of the reaction. Further, the carbon carrying metal oxide nanoparticles supported thereon in a highly dispersed state is made from both metal oxide nanoparticles produced by an accelerated liquid-phase chemical reaction wherein a shear stress and a centrifugal force are applied to reactants in a rotating reactor in the course of the reaction and carbon dispersed in the rotating reactor by applying a shear stress and a centrifugal force. Electrochemical devices made by using the carbon carrying the metal oxide nanoparticles as the electrode have high output and high capacity characteristics.
Abstract:
The present invention relates generally to catalysts comprising ruthenium oxide and to processes for catalyzing the oxidation and conversion of sulfur dioxide (SO 2 ) to sulfur trioxide (SO 3 ) using such catalysts. SO 2 at low concentrations in process gas streams can be effectively oxidized to SO 3 at relatively low temperatures using the ruthenium oxide catalysts of the present invention. In one application, the ruthenium oxide catalysts are used in the final contact stage for conversion of SO 2 to SO 3 in multiple stage catalytic converters used in sulfuric acid manufacture.
Abstract translation:本发明一般涉及包含氧化钌的催化剂以及使用这种催化剂催化氧化和将二氧化硫(SO 3)转化成三氧化硫(SO 3 H 3)的方法 。 使用本发明的氧化钌催化剂,可以在相对低的温度下将工艺气流中的低浓度的SO 2 SO 2有效地氧化成SO 3。 在一个应用中,氧化钌催化剂用于在硫酸制造中使用的多级催化转化器中用于将SO 2 SO 2转化为SO 3的最终接触阶段。
Abstract:
A metal oxide anchored graphene and carbon nanotube hybrid foam can be formed via a two-step process. The method can include forming at least one graphene layer and a plurality of carbon nanotubes onto a surface of a porous metal substrate by chemical vapor deposition to form a coated porous metal substrate, and depositing a plurality of metal oxide nanostructures onto a surface of the coated porous metal substrate to form the metal oxide anchored graphene and carbon nanotube hybrid foam.
Abstract:
The present disclosure relates to processes for recovering rare earth elements from an aluminum-bearing material. The processes can comprise leaching the aluminum-bearing material with an acid so as to obtain a leachate comprising at least one aluminum ion, at least one iron ion, at least one rare earth element, and a solid, and separating the leachate from the solid. The processes can also comprise substantially selectively removing at least one of the at least one aluminum ion and the at least one iron ion from the leachate and optionally obtaining a precipitate. The processes can also comprise substantially selectively removing the at least one rare earth element from the leachate and/or the precipitate.
Abstract:
Disclosed herein is an article having: a substrate and a RuO 2 coating having nanoparticles of RuO 2 . Also disclosed herein is an article having: a substrate and a RuO 2 coating. The coating is made by: immersing the substrate in a solution of RuO 4 and a nonpolar solvent at a temperature that is below the temperature at which RuO 4 decomposes to RuO 2 and warming the substrate and solution to ambient temperature under ambient conditions to cause the formation of the coating.
Abstract:
The present invention relates to a new synthetise for the preparation of mesoporous structures including mesoporous materials with chiral morphologies and mesoporous materials with localor surface chirality. The method can be used for manufacturing controlled drug delivery devices, for example for delivery of folic acid, and fluorescent particles.