Abstract: The invention relates to a method of producing nanotubes from coaxial jets of immiscible liquids or poorly-miscible liquids. The purpose of the invention is to produce hollow fibers (nanotubes) or composite fibers having diameters ranging from a few micras to tens of nanometers and comprising walls, in the case of nanotubes, with a thickness ranging from hundreds of nanometers to a few nanometers. The inventive nanotube-formation method involves the generation of coaxial nanojets of two liquids using electrohydrodynamic technology.

Abstract: The present invention includes a step of separating an effluent produced in a hydrogenation step of making tetrachlorosilane (STC) react with hydrogen into trichlorosilane (TCS), into a chlorosilane fraction containing a hydrocarbon and a TCS fraction, and a chlorination step of making the chlorosilane fraction containing the hydrocarbon react with chlorine to form STC and a substance containing a chlorinated hydrocarbon, wherein the effluent containing STC produced in the chlorination step is circulated to the hydrogenation step. In the chlorination step, the chlorosilane fraction containing a hydrocarbon (capable of containing hyper-hydrogenated chlorosilanes) having a boiling point close to TCS is hyper-chlorinated to be converted and acquire a higher boiling point, which facilitates the hyper-chlorinated chlorosilanes and the hyper-chlorinated hydrocarbons to be separated into high concentration, and increases the purity of TCS to be finally obtained.

Abstract: The present invention provides a zirconia-based mixed oxide which, together with improving the heat resistance of specific surface area at a high temperature (1000° C. for 3 hours), has a ceria reduction rate of 80% or more, or in other words, improves the heat resistance of specific surface area and the reduction rate of ceria. The zirconia-based mixed oxide has zirconia for the main component thereof and contains 5% or more of ceria and 1 to 30% of a rare earth metal oxide other than ceria, wherein the specific surface area after heat treating for 3 hours at 1000° C. is 50 m2/g or more, the reduction rate of the ceria contained in the mixed oxide is 80% or more, and preferably the specific surface area after heat treating for 3 hours at 1100° C. is 20 m2/g or more.

Abstract: The inventive method of producing silicon comprises reacting gaseous trichlorosilane with hydrogen to deposit silicon onto a substrate and to produce silicon tetrachloride by-product, vaporizing the silicon tetrachloride by-product to form gaseous silicon tetrachloride, converting the gaseous silicon tetrachloride to finely divided silicon, forming a silicon melt by melting the finely divided silicon, and forming solid silicon from the silicon melt.

Abstract: Process for preparing TiO2 powders starting from a liquid comprising chlorinated titanium compounds, the process comprising: a) atomizing said liquid and reacting the atomized liquid with a flow of steam and air at a temperature of 100-250° C. for converting said chlorinated titanium compounds to titanium dioxide TiO2; b) the gaseous phase and the entrained TiO2 powders obtained from step a) are then fed to an oven operated at a temperature in the range 400-900° C. to remove the residual organic compounds and hydrochloridic acid from said powders.

Abstract: Aggregated crystalline silicon powder with a BET surface area of 20 to 150 m2/g. It is prepared by subjecting at least one vaporous or gaseous silane and optionally at least one vaporous or gaseous doping material, an inert gas and hydrogen to heat in a hot wall reactor, cooling the reaction mixture or allowing the reaction mixture to cool and separating the product from gaseous substances in the form of a powder, wherein the proportion of silane is between 0.1 and 90 wt. %, with respect to the sum of silane, doping material, hydrogen and inert gases, and wherein the proportion of hydrogen, with respect to the sum of hydrogen, silane, inert gas and doping material, is in the range 1 mol. % to 96 mol. %. It can be used to produce electronic components.

Abstract: A Cr trapping agent is disposed so that it contacts with constituting components of the substrate containing Cr. As the Cr trapping agent, an element or Ag is used, wherein the element is stronger in basicity than alkali metals or alkaline earth metals. Since the Cr trapping agent prevents transfer of Cr towards the alkali metals or alkaline earth metals, the reaction between Cr and alkali metals or alkaline earth metals is prevented.

Abstract: Precipitated silicas having an SiOHisolated absorbance ratio of greater than or equal to 1, may be used as reinforcers and thickeners for sealants.

Abstract: In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica crystals, wherein a high concentration area with silicon is formed as a partial area inside a hydrothermal synthesis vessel, and at least a part of a surface-smoothed bulk material is present in the high concentration area with silicon to perform the hydrothermal reaction, the bulk material comprising a compound containing both silicon and oxygen as a supply source for a part or a whole of the structure composition elements of the porous silica crystals.

Abstract: An exhaust gas purifying system has a honeycomb filter including a porous partition wall having a number of pores arranged so that a plurality of cells communicating between two end faces are formed, and a plugging portion disposed in either of the end faces or inside the cell so as to plug the cell; and a NOx purifying catalyst including a honeycomb catalyst carrier having substantially same shape as the honeycomb filter, and a NOx selective reducing SCR catalyst or a NOx occluding catalyst carried on surface of the partition wall and/or on surface of the pores, wherein the honeycomb filter and the NOx purifying catalytic member are disposed in this order in an exhaust gas flow path where exhaust gas discharged from a diesel engine circulates. To provide an exhaust gas purifying system which realizes excellent purifying efficiency of NOx contained in exhaust gas discharged from a diesel engine, and small pressure loss, and can be mounted in limited space.

Abstract: Disclosed are a concentrate of fine ceria particles for chemical mechanical polishing, and a method of preparing the same. The method includes reacting a reactant mixture comprising i) water, ii) an aqueous solution of water-soluble cerium salt compound, and iii) ammonia or ammonium salt at a reaction temperature of 250-700? under a reaction pressure of 180-550 bar for 0.01 sec to 10 min in a continuous reactor to obtain a solution containing the fine ceria particles, the cerium salt compound being contained at an amount of 0.01 to 20 wt % in the reactant mixture; and concentrating the solution containing the fine ceria particles in a concentrator having a filter with a pore size of 0.01 to 10?. The concentrate is advantageous in that a CMP slurry and a dispersing solution are easily produced by diluting the concentrate and adding an additive to the concentrate.

Abstract: A method of forming rare earth oxide nanocrystals include the steps of dissolving a rare earth including compound in a solution containing at least one organic solvent, heating the solution to a temperature of at least 160° C., wherein a concentration of the rare earth including compound provided upon decomposition is sufficient to provide critical supersaturation of at least one active intermediate in the solution to nucleate a plurality of rare earth oxide nanocrystals. The plurality of rare earth nanocrystals are then grown, wherein the growing step proceeds at least in part in the absence of critical supersaturation of the active intermediate. The rare earth nanocrystals can assemble into at least one close-packed, ordered nanocrystal superlattice.

Abstract: Disclosed is an Cu/Zn/Al-catalyst containing copper oxide and zinc oxide as catalytically active components and aluminium oxide as thermostabilising component. The catalyst is characterized in that the Cu/Zn atomic ratio is <2.8 and the aluminium oxide component is obtained from an aluminium hydroxide sol.

Abstract: The present invention relates to a trifunctional catalyst used in catalytic cracking device in petroleum refining industry and a method for preparing the same. The trifunctional catalyst of the invention comprises absorbent, cerium dioxide and vanadium pentoxide acting as oxidative catalyst and cerium oxyfluoride acting as structural promoter. The oxidative catalyst and structural promoter are dispersed over the absorbent. The absorbent is spinel-based composite oxides having a general formula of MgAl2-xFexO4.yMgO, where the x is 0.01-0.5 and y is 0.2-1.2. In the trifunctional catalyst, the raw material for forming the chemical compound containing rare-earth cerium is hamartite powder. The method for preparing the trifunctional catalyst of the invention is shown as follows: the components relating to the preparation of the finished product are dissolved or dispersed into liquid materials; then the trifunctional catalyst is obtained after the mixing, drying and calcining of such liquid materials.

Abstract: The invention relates to a structure, comprising a substrate supporting a layer with a photocatalytic and anti-soiling property on at least part of the surface thereof, said layer being based on titanium dioxide (TiO2) which is at least partially crystallized in the anatase form thereof. Said structure is characterised in comprising a sublayer (SC) directly under at least one TiO2 layer, said sublayer having a crystallographic structure which provides assistance to crystallization by heteroepitaxial growth in the anatase form of the TiO2-based upper layer, the photocatalytic property being obtained without any heating step.

Abstract: The subject of the present invention is to provide a method for producing a silica gel supporting a derivatizing agent for a carbonyl compound that hardly collects carbonyl compounds during production thereof, and a silica gel supporting a derivatizing agent for a carbonyl compound produced by said production method, in order to lower a blank value in measurement of carbonyl compounds.

Abstract: A catalyst having dual functionality for the removal of arsenic and the selective hydrogenation of diolefins from monoolefin-containing hydrocarbon streams that have an arsenic concentration and a diolefin concentration, and processes for making and using such catalyst. The catalyst is a heat treated shaped mixture of a refractory oxide and a Group VIII metal that is overlaid with additional Group VIII metal.

Abstract: The invention relates to a bulk metal hydrotreating catalyst, suitable for the production of low sulfur diesel fuels, said bulk metal hydrotreating catalyst being in the oxide state and having a composition of MoxCoyNbz, excluding the oxygen, wherein x, y, and z represent about 0.1 to about 2 moles of Mo, about 0.5 to about 2 moles of Co, and about 0.1 to about 2 moles Nb and wherein Nb is present in amounts from about 2 to about 45 wt. %, Mo is present in amounts from about 1 to about 50 wt. %, and Co is present in amounts from about 10 to about 45 wt. %.

Abstract: A zirconia-containing composition and processes for synthesizing same. The composition comprises least about 99.9 percent tetragonal phase zirconia, based on the total crystalline zirconia in the zirconia-containing composition as determined by x-ray diffraction (XRD). The composition also has a substantially spherical morphology and comprises less than 100 wppm chlorine, based on the total weight of the zirconia-containing composition. The zirconia-containing composition has an average surface area of at least 80 m2/g and an average particle size of less than about 10 microns.

Abstract: A method for producing a catalytically-active material having at least one base component and at least one catalytically-active component in which the at least one base component is heated to a softening or melting temperature to form a softened or molten base component. While the base component is in the softened or molten state, at least one catalytically-active component is incorporated into or onto the base component, forming the catalytically-active material. In accordance with one embodiment, a catalyst precursor is introduced into the base component and subsequently transformed to a catalytically-active component.