Abstract: An object of the present invention is to provide a high-aspect-ratio plate-like alumina particle having low aggregability and high dispersibility and a method for producing the particle. The above problem is solved by providing a plate-like alumina particle including a step of firing an aluminum compound in the presence of a shape-controlling agent and a molybdenum compound serving as a fluxing agent. The above problem is solved also by providing a method for producing a plate-like alumina particle, the method including a step in which the aluminum compound and the molybdenum compound react with each other to form aluminum molybdate and a step in which the aluminum molybdate is decomposed to obtain the plate-like alumina particle.

Abstract: The invention relates to a method for operating a fluidized bed boiler, comprising carrying out the combustion process with a fluidized bed comprising ilmenite particles, wherein the average residence time of the ilmenite particles in the boiler is at least 75 hours. The invention further relates to ilmenite particles obtainable by a corresponding method and the use of said ilmenite particles as oxygen-carrying material.

Abstract: A method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including: a raw material preparation step including sub-step (I) of preparing an aqueous mixed liquid (A) containing Mo, V, and Sb, sub-step (II) of adding hydrogen peroxide to the aqueous mixed liquid (A), thereby facilitating oxidation of the aqueous mixed liquid (A) and obtaining an aqueous mixed liquid (A?), and sub-step (III) of mixing the aqueous mixed liquid (A?) and a Nb raw material liquid (B), thereby obtaining an aqueous mixed liquid (C); a drying step of drying the aqueous mixed liquid (C), thereby obtaining a dried powder; and a calcination step of calcining the dried powder under an inert gas atmosphere, wherein a time elapsed from addition of the hydrogen peroxide to the aqueous mixed liquid (A) to mixing the Nb raw material liquid (B) therewith is less than 5 minutes and the aqueous mixed liquid (A?) before being subjected to the sub-step (III) has an oxidation-reduction potential of 150 to 350 mV.

Abstract: The present invention relates to a process for the polyol-type synthesis of nanoparticulate magnetite starting from mixtures of Fe0 and FeIII in the presence of a mineral acid. The magnetite particles obtainable from the process have uniform size characteristics and have even presented higher SAR (Specific Absorption Rate) values than those of magnetosomes.

Abstract: The present invention relates to the field of solid materials for adsorption of lithium. In particular, the present invention relates to a novel method for preparing a crystallized and shaped solid material, preferably as extrudates, of formula LiXx.2Al(OH)3, nH2O with n being comprised between 0.01 and 10, x being equal to 1 when X is an anion selected from among chloride, hydroxide and nitrate anions, and x being equal to 0.5 when X is an anion selected from among sulfate and carbonate anions, comprising a step a) for precipitation of boehmite under specific temperature and pH conditions, at least one shaping step, preferably by extrusion, said method also comprising a final hydrothermal treatment step, the whole giving the possibility of increasing the adsorption capacity for lithium as well as the adsorption kinetics of the materials obtained as compared with the materials of the prior art when the latter is used in a method for extracting the lithium from saline solutions.

Abstract: Provided are: titanium oxide fine particles having small primary particle diameters and small agglomerated particle diameters; and a method for producing titanium oxide fine particles. The BET diameters of the titanium oxide fine particles are 1-50 nm; the agglomerated particle diameters thereof are 1-200 nm; and the (agglomerated particle diameter)/(BET diameter) ratio is 1-40. Titanium (oxy)chloride is hydrolyzed in an aqueous solvent, while controlling the pH range and the temperature range. Preferably, titanium (oxy)chloride is subjected to a primary hydrolysis in an aqueous solvent, and a secondary hydrolysis is subsequently carried out, while adding titanium (oxy)chloride thereto.

Abstract: A catalytic composition useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, and mixtures thereof. The catalytic composition comprises a complex of metal oxides comprising bismuth, molybdenum, iron, cerium and other promoters, with a desirable composition.

Abstract: A catalyst powder according to the present invention is a catalyst powder that includes: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and contains ceria and zirconia. The ratio (M2/M1) is 0.30 or more and 0.95 or less, the ratio (M2/M1) being the ratio of a mole fraction M2 (mol %) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M1 (mol %) of cerium in the entire powder. It is preferable that the ratio (M4/2/M3/1) between M3/1 and M4/2 is 1.1 or more and 5.0 or less, wherein M3/1 (=M3/M1) represents the ratio between a mole fraction M3 (mol %) of zirconium in the entire powder and a mole fraction M1 (mol %) of cerium in the entirety of the powder, and M4/2 (=M4/M2) represents the ratio between a mole fraction M4 (mol %) of zirconium measured using X-ray photoelectron spectroscopy and a mole fraction M2 (mol %) of cerium measured using X-ray photoelectron spectroscopy.

Abstract: A hydroprocessing catalyst has been developed. The catalyst is a crystalline transition metal molybdotungstate material or metal sulfides derived therefrom, or both. The hydroprocessing using the crystalline transition metal molybdotungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

Abstract: Amine functional solid sorbents for carbon dioxide capture and sequestration may be prepared from metal oxide foam solid sorbent supports by treating an appropriate metal oxide foam solid sorbent support with an amine material. Desirable are metal oxide foam solid sorbent supports with a foam structure and morphology at least substantially absent hollow sphere, layered sphere, wormlike and amorphous structure and morphology components. The amine materials may be sorbed into the metal oxide foam solid sorbent support, or alternatively chemically bonded, such as but not limited to covalently bonded, to the metal oxide foam solid sorbent support.

Abstract: A method of arranging nanocrystals is provided, which includes a first process of putting barium titanate nanocrystals and/or strontium titanate nanocrystals, and a nonpolar solvent into a container, a second process of collecting a supernatant liquid including the barium titanate nanocrystals and/or the strontium titanate nanocrystals from the container, and a third process of immersing a substrate having an uneven structure into the supernatant liquid, and pulling up the substrate so as to coat the surface of the uneven structure with the supernatant liquid by using a capillary phenomenon, and to arrange the nanocrystals on the uneven structure.

Abstract: The present invention relates to: an alumina powder wherein a ratio (TBD/LBD) of a tapped bulk density (TBD) to a loose bulk density (LBD) is 1.5 or more; an alumina slurry containing the same; an alumina-containing coating layer; a multilayer separation membrane; and a secondary battery.

Abstract: The present invention provides a catalyst composition for inhibiting the inactivation of a catalyst for purification of compressed natural gas combustion system exhaust gas on which a noble metal component comprising platinum and palladium is supported. An oxidation catalyst, for a compressed natural gas vehicle or static combustion system exhaust gas, in which a first alumina impregnated with platinum, a second alumina impregnated with palladium, and a ceria component are supported on a ceramic support, has a barium cocatalyst supported on the first alumina, thereby greatly inhibiting inactivation of a CNG lean burn engine catalyst.

Abstract: There is provided a catalyst that exhibits a high denitration efficiency at a relatively low temperature and does not cause oxidation of SO2 in a selective catalytic reduction reaction that uses ammonia as a reducing agent. A denitration catalyst is obtained by coating a substrate with a catalyst component. The catalyst component contains 43 wt % or more of vanadium pentoxide and has a BET specific surface area of 30 m2/g or more. The denitration catalyst is used for denitration at 200° C. or lower.

Abstract: An exhaust gas purifying catalyst according to the present invention is provided with a base material 10 and a catalyst-coated layer 30. The catalyst-coated layer 30 is provided with a lower layer 34 and an upper layer 32. The upper layer 32 contains Rh and/or Pt as a noble metal catalyst. The lower layer 34 contains Pd as a noble metal catalyst. The lower layer 34 is provided with a front-stage lower layer 34a positioned on an upstream side and a rear-stage lower layer 34b positioned on a downstream side. The front-stage lower layer 34a is a Ce-free layer that does not contain a Ce-containing oxide. The rear-stage lower layer 34b is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure.

Abstract: A method of treating a powder (P) made from cerium oxide using an ion beam (F) in which: —the powder is stirred once or a plurality of times; —the ions of the ion beam are selected from the ions of the elements of the list consisting of helium (He), boron (B), carbon (C), nitrogen (N), oxygen (O), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe)—the acceleration voltage of the ions of the beam is between 10 kV and 1000 kV; —the treatment temperature of the powder (P) is less than or equal to Tf/3; —the ion dose per mass unit of powder to be treated is chosen from a range of between 1016 ions/g and 1022 ions/cm2 so as to lower the reduction temperature of the powder made from cerium oxide (P).

Abstract: A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.

Abstract: The invention belongs to the field of novel photocatalytic materials, and particularly relates to a ZnWO4 photocatalytic material containing oxygen vacancy. According to the material, absorption exists in a near infrared region of an ultraviolet-visible light diffuse reflection spectrum, wherein the wavelength range of the near infrared region is 780-2500 nm. The invention further relates to a preparation method of the ZnWO4 photocatalytic material containing oxygen vacancy. Na2WO4 and soluble zinc salt are used as raw materials, ZnWO4 crystals are formed through a hydrothermal crystallization reaction and then roasted in the presence of hydrogen so as to achieve partial reduction of ZnWO4, and then the ZnWO4 photocatalytic material containing oxygen vacancy is obtained.

Abstract: A method for producing a mixed calcium and magnesium compound comprising the slaking of quicklime with a magnesium hydroxide suspension, forming solid particles, said slaking by non-wet means forming said solid particles comprising a calcium phase and a magnesium phase intimately bonded to each other and of homogeneous volume distribution, and a mixed compound comprising a calcium phase and a magnesium phase.

Abstract: A metal oxide catalyst capable of catalyzing an oxidative coupling of methane reaction is described. The metal oxide catalyst includes a lanthanum (La) cerium (Ce) metal oxide and further including a lanthanum hydroxide (La(OH)3) crystalline phase. The catalyst is capable of catalyzing the production of C2+ hydrocarbons from methane and oxygen. Methods and systems of using the metal oxide catalyst to produce C2+ hydrocarbons from a reactant gas are also described.