Abstract: A method of producing catalyst powder of the present invention has a step of precipitating a transition metal particle and a base-metal compound in a reversed micelle substantially simultaneously, and a step of precipitating a noble metal particle in the reversed micelle. By this method, it is possible to obtain catalyst powder which restricts an aggregation of noble metal particles even at the high temperature and is excellent in the catalytic activity.

Abstract: The invention provides a method for depositing catalytic clusters on a surface, the method comprising confining the surface to a controlled atmosphere; contacting the surface with catalyst containing vapor for a first period of time; removing the vapor from the controlled atmosphere; and contacting the surface with a reducing agent for a second period of time so as to produce catalyst-containing nucleation sites.

Abstract: A method of producing a porous composite metal oxide comprising the steps of: dispersing first metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, in a dispersion medium by use of microbeads each with a diameter of not larger than 150 ?m, thus obtaining first metal oxide particles, which are 1 nm to 50 nm in average particle diameter, and not less than 80% by mass of which are not larger than 75 nm in diameter; dispersing and mixing up, in a dispersion medium, the first metal oxide particles and second metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, and which is not larger than 200 nm in average particle diameter, thus obtaining a homogeneously-dispersed solution in which the first metal oxide particles and second metal oxide particles are homogeneously dispersed; and drying the homogeneously-dispersed solution, thus obtaining a porous composite metal oxide.

Abstract: The present invention provides a method for manufacture of supported noble metal based alloy catalysts with a high degree of alloying and a small crystallite size. The method is based on the use of polyol solvents as reaction medium and comprises of a two-step reduction process in the presence of a support material. In the first step, the first metal (M1=transition metal; e.g. Co, Cr, Ru) is activated by increasing the reaction temperature to 80 to 160° C. In the second step, the second metal (M2=noble metal; e.g. Pt, Pd, Au and mixtures thereof) is added and the slurry is heated to the boiling point of the polyol solvent in a range of 160 to 300° C. Due to this two-step method, an uniform reduction occurs, resulting in noble metal based catalysts with a high degree of alloying and a small crystallite size of less than 3 nm. Due to the high degree of alloying, the lattice constants are lowered.

Abstract: Provided are a sorbent composition, the preparation method thereof, and the process for removing sulfur oxides and nitrogen oxides in a flue gas by the sorbent composition. The sorbent composition comprises at least one refractory inorganic oxide matrix, at least one metal component I and at least one metal component II, wherein each of the at least one refractory inorganic oxide matrix has a specific surface area of more than 130 m2/g, the at least one metal component I is selected from elements of Group IA and Group IIA in the Periodic Table of Elements, and the at least one metal component II is selected from transition metals of Group IIB, Group VIB, Group VIIB, and Group VIII in the Periodic Table of Elements, and wherein the at least one metal component II is present in at least two different valence-states, as characterized by the X-ray photoelectron spectroscopy.

Abstract: An engine exhaust catalyst exhibits improved CO oxidation performance relative to conventional engine exhaust catalysts and includes a first supported catalyst comprising platinum and a second supported catalyst comprising palladium and gold species in close contact. The first supported catalyst may be a platinum catalyst, a platinum—palladium catalyst, or a platinum catalyst promoted with bismuth, and the second supported catalyst preferably has a palladium to gold weight ratio of about 0.85:1.0. To improve aged catalyst performance, the first and second supported catalysts are coated onto different layers, zones, or monoliths of the substrate for the engine exhaust catalyst.

Abstract: Sorbents for removal of mercury and other pollutants from gas streams, such as a flue gas stream from coal-fired utility plants, and methods for their manufacture and use are disclosed. The methods include mixing sorbent substrate particles with a sulfide salt and a metal salt to form a metal sulfide on the outer surface of the sorbent particles.

Abstract: A coated metal substrate useful for carrying an exhaust emission treatment catalyst such as a three-way conversion catalyst for use with small engine platforms. The coated metal substrate comprises a metal such as a stainless steel, a carbon steel, a FeCr alloy, HASTELLOY® and the like. The coating on the metal substrate comprises an alumina silicate having alumina particles impregnated therein. The coating is applied using a liquid dispersion containing an aluminum silicate and the alumina particles are dispersed into the aluminum silicate coating while the coating is still wet. The coated metal substrate is then calcined. Thereafter, a washcoat containing an engine exhaust treatment catalyst may be applied to the surface of the coated metal substrate.

Abstract: The present invention includes Fischer-Tropsch catalysts, reactions using Fischer-Tropsch catalysts, methods of making Fischer-Tropsch catalysts, processes of hydrogenating carbon monoxide, and fuels made using these processes. The invention provides the ability to hydrogenate carbon monoxide with low contact times, good conversion rates and low methane selectivities. In a preferred method, the catalyst is made using a metal foam support.

Abstract: The present invention is directed to a method of preparing compositions enriched in compounds containing carbon chains of varying degrees of unsaturation using argentation chromatography. The present method utilizes an argentized cationic resin or a conditioned argentized alumina to separate compounds containing saturated or mono-unsaturated carbon chains from compounds having polyunsaturated carbon chains present in a starting composition. The invention is particularly useful for preparing a composition enriched in polyunsaturated fatty acid alkyl esters from mixtures of fatty acid esters in a starting composition derived from vegetable oils. The present invention is also directed to a method of preparing a conditioned argentized alumina adsorbent having increased selectivity for compounds containing one or more polyunsaturated carbon chains.

Abstract: The present invention relates to a novel method for preparing a catalyst for partial oxidation of methylbenzenes, comprising, (a) a step of preparing a solution or slurry of the compounds comprising tungsten; (b) a step of supporting the solution or slurry obtained in the step (a) on inorganic carrier; (c) a step of drying the catalyst obtained in the step (b); and (d) a step of calcining the dried catalyst obtained in the step (c), characterized in that the ratio of the pore volume of inorganic carrier and the volume of the solution or slurry in the step (b) is 1:0.9˜1.1, and the catalyst provides superior aromatic aldehydes selectivity to those prepared by the conventional impregnation or heat evaporation method over a wide range of conversion rate.

Abstract: Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.

Abstract: A process is described for preparing a solution formed by at least one cobalt and/or nickel salt of at least one heteropolyanion combining molybdenum and cobalt or molybdenum and nickel in its structure, said process comprising: a) mixing at least one source of molybdenum and at least one oxidizing compound in aqueous solution to synthesize peroxomolybdate ions at an acidic pH, the (oxidizing compound/molybdenum source) mole ratio being in the range 0.1 to 20; b) introducing at least one cobalt precursor and/or at least one nickel precursor into the solution from step a) to form a solution comprising at least said salt in which the (Co+Ni)/Mo mole ratio is in the range 0.25 to 0.85.

Abstract: The hydrothermal stability of transition aluminas used as adsorbents and catalyst carriers is improved through their treatment with a soluble silicon inorganic compound such as sodium silicate wherein the silicon compound is mixed with the alumina powder at the production stage of forming particulates by liquid addition. The silicon containing particulates are activated by heating at a temperature lower than 500° C. and treated, before or after the thermal activation, by a colloidal silica solution to produce a hydrothermally stable, low dust alumina. The total silica content of the final product is typically less than 5 mass-%.

Abstract: A method of producing catalyst powder of the present invention has a step of precipitating a carrier in a reversed micelle, and a step of precipitating at least one of a noble metal particle and a transition metal particle in the reversed micelle in which the carrier is precipitated. By this method, it is possible to obtain catalyst powder excellent in heat resistance and high in the catalytic activity.

Abstract: A purification catalyst for exhaust gas enhances the activities of the precious metals, preventing drop of activities at high temperature, and exhibiting a sufficient performance even during low temperature (below 400° C.) operation when starting a vehicle or during idling. The Pd oxide is supported on the Al oxide, and the Al oxide is LnAlO3 (Ln: rare-earth element).

Abstract: An oxidation catalyst system is formed by particles of an oxidation catalyst dispersed in a porous sol-gel binder. The oxidation catalyst system can be applied by brush or spray painting while the sol-gel binder is in its sol state.

Abstract: Disclosed herein is a method for manufacturing a high-crush-strength iridium catalyst for hydrazine decomposition for spacecraft and satellite propulsion using bauxite, the method including: an acid treatment step of bringing bauxite into contact with a 0.1-10 M acid solution for 10-14 hr; a filtration step of filtering the acid-treated bauxite as a solid to remove the remaining acid and impurities; a thermal treatment step of bringing the filtered bauxite into contact with hot air at a temperature of 500-700° C. for 2-6 hr; a catalyst loading step of loading an iridium catalyst onto the thermally treated bauxite; and a reduction step of reducing the catalyst of the catalyst-loaded bauxite.

Abstract: A catalyst that can be used for the production of hydrogen from hydrocarbon fuels in steam reforming processes contains an active metal of, e.g., at least one of Ir, Pt and Pd, on a catalyst support of, e.g., at least one of monoclinic zirconia and an alkaline-earth metal hexaaluminate. The catalyst exhibits improved activity, stability in both air and reducing atmospheres, and sulfur tolerance.

Abstract: A method comprising contacting a support with one or more chromium-containing compounds and one or more boria precursors to provide a catalyst precursor, and activating the catalyst precursor to provide a polymerization catalyst.

Abstract: A layered composition which can be used in various processes has been developed. The composition comprises an inner core such as a cordierite core and an outer layer comprising a refractory inorganic oxide, a fibrous component and an inorganic binder. The refractory inorganic oxide layer can be alumina, zirconia, titania, etc. while the fibrous component can be titania fibers, silica fibers, carbon fibers, etc. The inorganic oxide binder can be alumina, silica, zirconia, etc. The layer can also contain catalytic metals such as gold and platinum plus other modifiers. The layered composition is prepared by coating the inner core with a slurry comprising the refractory inorganic oxide, fibrous component, an inorganic binder precursor and an organic binding agent such as polyvinyl alcohol. The composition can be used in various hydrocarbon conversion processes.

Abstract: An exhaust gas purifying catalyst of the present invention has a substrate, and a catalyst layer formed on an inner wall of the substrate and composed of at least a single layer. The catalyst layer contains a carrier supporting noble metal. Further, a maximum height of profile of a surface of a top layer in the catalyst layer is not less than 2 ?m and not more than 50 ?m, and the top layer contains the carrier supporting noble metal.

Abstract: Metal oxide particles heated while immersed in water in a closed container are combined with membrane filtration to remove contaminants from water. The use of the heated particles reduces fouling of the membrane typically encountered when membranes alone are used to remove contaminants from water.

Abstract: Composite combustion catalyst particles are described and disclosed. A metal core of a combustible metal can be coated with a metal oxide coating. Additionally, a catalyst coating can at least partially surround the metal oxide coating to form a composite catalyst particle. The composite catalyst particles can be dispersed in a variety of fuels such as propulsion fuels and the like to form an enhanced fuel. During initial stages of combustion, the catalyst coating acts to increase combustion of the fuel. As combustion proceeds, the metal core heats sufficiently to disturb the metal oxide coating. The metal core then combusts in highly exothermic reactions with an oxidizer and the catalyst coating to provide improved energy densities to the enhanced fuel.

Abstract: Carbon monoxide is removed from material streams by adsorption to an adsorption composition comprising oxides of copper, zinc and aluminum, the copper-comprising fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at most 60%.

Abstract: A process and catalyst for the selective hydrodesulfurization of a naphtha containing olefins. The process produces a naphtha stream having a reduced concentration of sulfur while maintaining the maximum concentration of olefins.

Abstract: The present invention concerns a process for capturing organosiliceous complexes in the gaseous or liquid phase on a solid containing at least 80% by weight of alumina after calcining at 1000° C. The alumina has a total pore volume of more than 30 ml/100 g, a fraction of the pore volume in pores with a diameter of 70 ? or more of more than 10 ml/100 g and a specific surface area of more than 10 m2/g.

Abstract: An improved dehydrogenation catalyst bed system for olefin production utilizing classical processing techniques is disclosed.

Abstract: The invention provides a catalyst containing active elements including copper deposited on alumina containing at least 0.03 g of titanium, expressed in metal form, per kg of alumina and use thereof in gas hase reactions, such as the oxychlorination of ethylene to 1,2-dichloroethane. This catalyst is suitable for maintaining a constant oxygen content in the tail gases and hence in the recycled gases. The invention further pertains to the use of an alumina containing at least 0.03g titanium, expressed in metal form, per Kg of alumina, as catalyst support and as catalyst diluent. In an example a catalyst containing CuCl2, MgCl2, KCl and LiCl deposited on alumina containing 1.13 g of titanium, expressed in metal form, per Kg of alumina was used for the oxychlorination of ethylene to 1,2-dichloroethane in a fluidized bed reactor.

Abstract: An engine exhaust catalyst containing precious metal nanoparticles is promoted with bismuth. The bismuth promotion improves the catalyst's CO oxidation performance. Also, by varying the amount of bismuth that is added, the NO conversion rate that can be realized with the catalyst can be controlled. The control over the NO conversion rate is important because the passive regenerative performance of a particulate filter used in engine exhaust systems is based on the amount NO2 that is present in the exhaust stream that reaches the particulate filter. The amount of NO2 being produced needs to be optimized (not necessarily maximized) so that adequate particulate filter regeneration performance can be maintained while avoiding unused, toxic NO2 from being exhausted into the atmosphere.

Abstract: An engine exhaust catalyst containing precious metal nanoparticles is promoted with bismuth. The bismuth promotion improves the catalyst's CO oxidation performance. Also, by varying the amount of bismuth that is added, the NO conversion rate that can be realized with the catalyst can be controlled. The control over the NO conversion rate is important because the passive regenerative performance of a particulate filter used in engine exhaust systems is based on the amount NO2 that is present in the exhaust stream that reaches the particulate filter. The amount of NO2 being produced needs to be optimized (not necessarily maximized) so that adequate particulate filter regeneration performance can be maintained while avoiding unused, toxic NO2 from being exhausted into the atmosphere.

Abstract: A catalyst which suppresses aggregation of metal particles and which has superior heat resistance. In the catalyst, metal particles are supported by a surface of a carrier while being partially embedded therein.

Abstract: Aluminum hydroxide fibers approximately 2 nanometers in diameter and with surface areas ranging from 200 to 650 m2/g have been found to be highly electropositive. When dispersed in water they are able to attach to and retain electronegative particles. When combined into a composite filter with other fibers or particles they can filter bacteria and nano size particulates such as viruses and colloidal particles at high flux through the filter. Such filters can be used for purification and sterilization of water, biological, medical and pharmaceutical fluids, and as a collector/concentrator for detection and assay of microbes and viruses. The alumina fibers are also capable of filtering sub-micron inorganic and metallic particles to produce ultra pure water. The fibers are suitable as a substrate for growth of cells. Macromolecules such as proteins may be separated from each other based on their electronegative charges.

Abstract: A method for preparing an exhaust gas catalyst includes preparing a washcoat comprising a catalytically effective amount of at least one catalytically active metal disposed upon an oxide support; disposing the catalytically active metal-oxide support washcoat upon a catalyst substrate; drying the washcoated catalyst substrate using microwave energy to affix the precious metals to the oxide support; and conventionally calcining the dried washcoated catalyst substrate. The catalysts comprising a substrate having dispersed thereon an inorganic oxide washcoat, the washcoat having been affixed to the substrate by microwave drying, exhibit high exhaust gas purifying performance and long durability. The catalysts thus produced further provide a long in-service lifetime for reforming organic fuel species into hydrogen, carbon monoxide and light hydrocarbons used in the nitrogen oxides reduction process.

Abstract: In a powdery catalyst (1), a porous carrier (2) has a complex part (3) configured to hold a noble metal particle (4), the complex part being composed of a transition metal material and a constituent material of the porous carrier (2).

Abstract: Provided are a hydrogenation catalyst for hydrocarbon oil, having markedly improved desulfurization activity, denitrogenation activity, and dearomatization activity; a carrier for the catalyst and its production; and a method of hydrogenation of hydrocarbon oil with the catalyst.

Abstract: A honeycomb structure includes adhesive layers and plural honeycomb units bonded to each other by interposing the adhesive layers between the plural honeycomb units. Each of the honeycomb units has partition walls extending along a longitudinal direction of the honeycomb units to define plural through holes. The plural honeycomb units include a SOx absorbent, inorganic particles, and an inorganic binder. An expression Y??0.3X+1.55 (about 1.0?X?about 2.5) is satisfied, in which X represents a content (mol/L) of the SOx absorbent in the partition walls and Y represents a ratio B/A in which A represents a Young's modulus of the honeycomb units and B represents a Young's modulus of the adhesive layers.

Abstract: Dry-scrubbing media compositions, methods of preparation and methods of use are provided. The compositions contain activated alumina and magnesium oxide. Optionally, activated carbon and other impregnates, such as hydroxides of group 1A metals, are included. The compositions exhibit improved efficiency and capacity for the removal of compounds, such as hydrogen sulfide, from an air-stream. The compositions are particularly useful for reducing or preventing the release of toxic gaseous compounds from the areas such as landfills, petroleum storage areas, refineries, drinking water systems, sewage treatment facilities, swimming pools, hospital morgues, animal rooms, and pulp and paper production sites.

Abstract: A particulate pre-reduction cobalt supported Fischer-Tropsch synthesis catalyst precursor which comprises a catalyst support impregnated with cobalt, is treated with a pure hydrogen reducing gas, at a first specific feed gas space velocity, SV1, and at a first heating rate, HR1, to obtain a partially reduced precursor. The support contains reducible cobalt oxide in a calcined state and having a formula-unit in which each mole of cobalt atoms is associated with more than 4/3 moles of oxygen atoms and displaying a reducible cobalt oxide specific surface area at least equal to that of Co3O4 spinel. The partially reduced precursor is then treated with a pure hydrogen reducing gas, at a second specific feed gas space velocity, SV2, and at a second heating rate, HR2, to obtain an activated supported Fischer-Tropsch catalyst, with SV2?SV1 and/or HR2?HR1; however, when SV2=SV1, HR2?HR1 and when HR2=HR1, SV2?SV1.

Abstract: A purification catalyst for exhaust gas which exhibits satisfactory performance even at a low temperature operation of starting or idling of engine (not more than 400° C.), and a production method therefore are provided. The catalyst comprises an aluminum oxide supporting Pd, and the aluminum oxide is LnAlO3 (Ln: rare-earth metal).

Abstract: A catalyst for use in the Fischer-Tropsch process, and a method to prepare the catalyst is disclosed. The catalyst of the present invention has a higher surface area, more uniform metal distribution, and smaller metal crystallite size than Fischer-Tropsch catalysts of the prior art.

Abstract: The present invention is directed to processes for preparing supported metal catalysts comprising one or more catalytically active metals applied to a porous catalyst support and to processes that use such catalysts. The process requires the formation of an organic complex during the manufacture of the catalyst which after its formation is either partially or fully decomposed before reduction if the metal to form the catalyst. The catalysts have high levels of metal dispersion and uniform distribution of catalytically active metals on the support. The catalysts obtained form the processes are particularly effective in catalysing Fischer-Tropsch reactions and as adsorbants for the removal or organosulfur compounds from hydrocarbons.

Abstract: A Composition comprising one or more metal hydroxy salts and a matrix, binder or carrier material, wherein the metal hydroxy salt is a compound comprising (a) as metal either (i) one or more divalent metals, at least one of them being selected from the group consisting of Ni, Co, Ca, Zn, Mg, Fe, and Mn, or (ii) one or more trivalent metal(s), (b) framework hydroxide, and (c) a replaceable anion. This composition has various catalytic applications.

Abstract: Mercury and/or arsenic or compounds thereof are removed from streams of matter by contacting them with an absorption composition containing silver and aluminium oxide, which absorption composition is characterized in that the aluminium oxide is at least 50% by weight theta-aluminium oxide.

Abstract: The present invention is related to single and/or multiple-wall carbon nanotubes which may contain interstitial metals obtainable by a preparation process. The process includes a catalytic step using a catalytic system which includes a catalyst and a support. The support comprises hydroxides and/or carbonates or mixtures thereof with or without metal oxides. The present invention is also related to carbon fibers obtainable by said preparation process. The present invention also pertains in particular to said catalytic system and to said preparation process. Another aspect concerns the use of the nanotubes and of the catalytic system according to the invention.

Abstract: An alcohol steam reforming catalyst for generating hydrogen contains palladium, yttrium, and at least one of cerium and a metal oxide. The catalyst displays both an improved alcohol conversion rate and improved carbon dioxide selectivity. Methods of making and using the alcohol steam reforming catalyst are described.

Abstract: Compounds and methods for sorbing organosulfur compounds from fluids are provided. Generally, compounds according to the present invention comprise mesoporous, nanocrystalline metal oxides. Preferred metal oxide compounds either exhibit soft Lewis acid properties or are impregnated with a material exhibiting soft Lewis acid properties. Methods according to the invention comprise contacting a fluid containing organosulfur contaminants with a mesoporous, nanocrystalline metal oxide. In a preferred embodiment, nanocrystalline metal oxide particles are formed into pellets (14) and placed inside a fuel filter housing (12) for removing organosulfur contaminants from a hydrocarbon fuel stream.

Abstract: The present invention relates to a catalyst for the purification of exhaust gases from an internal combustion engine, which comprises a catalytically active coating on an inert ceramic or metal honeycomb body, said coating comprising at least one platinum group metal selected from the group consisting of platinum, palladium, rhodium and iridium on a fine, oxidic support material. As an oxidic support material, the catalyst comprises a low-porosity material on the basis of silicon dioxide that comprises aggregates of essentially spherical primary particles having an average particle diameter of between 7 and 60 nm.

Abstract: This invention relates to doped catalysts on an aluminosilicate substrate with a low content of macropores and the hydrocracking/hydroconversion and hydrotreatment processes that use them. The catalyst comprises at least one hydro-dehydrogenating element that is selected from the group that is formed by the elements of group VIB and group VIII of the periodic table and a dopant in a controlled quantity that is selected from among phosphorus, boron, and silicon and a non-zeolitic substrate with a silica-alumina base that contains a quantity of more than 15% by weight and of less than or equal to 95% by weight of silica (SiO2).

Abstract: The invention relates to a shaped catalyst or catalyst precursor containing a catalytically active component or a precursor therefore, the component selected from elements of Group VIII of the Periodic Table of the Elements, supported on a carrier, which catalyst or catalyst precursor is an elongated shaped particle having three protrusions each extending from and attached to a central position, wherein the central position is aligned along the longitudinal axis of the particle, the cross-section of the particle occupying the space encompassed by the outer edges of six circles around a central circle, each of the six circles touching two neighboring circles while three alternating circles are equidistant to the central circle and may be attached to the central circle, minus the space occupied by the three remaining outer circles and including the six interstitial regions.