Abstract: The present application relates to a method for producing a silica film, which includes a step of contacting a silica precursor layer formed of a silica precursor composition having a pH of 5 or less with a Lewis base, where the silica precursor composition includes a silica precursor formed from a silane compound and an acid catalyst. The present application can provide a method capable of forming a silica film having excellent resistance to a vertical load and a tangential load without going through expensive equipment or a high temperature process.

Abstract: An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a first washcoat comprising a zeolite, Pt, and first refractory metal oxide support containing manganese, a second washcoat comprising a second refractory metal oxide support, a Pt component and a Pd component, and a third washcoat comprising palladium and a rare earth oxide component is described.

Abstract: A method for producing the silica carrier which includes kneading fumed silica obtained by a combustion method, silica gel obtained by a gel method, and colloidal silica obtained by a sol-gel method or a water glass method, molding the resulting kneaded product, and calcining the resulting molded body. The silica carrier has, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less.

Abstract: A precipitated silica having a broad particle size distribution and large median particle size as well as its method of manufacture is provided. The precipitated silica has a CTAB surface area SCTAB in the range from 40 to 300 m2/g, a difference between BET surface area SBET and CTAB surface area SCTAB of at least 35 m2/g, a width of the particle size distribution Ld, measured by centrifugal sedimentation, of at least 1.5, an amount of aluminium WA1 in the range from 0.5 to 7.0 wt %, and a median particle size d50, measured by centrifugal sedimentation, such that for a given value of CTAB surface area SCTAB and amount of aluminium WAl, parameter A, defined by the following equation: A=|d50|+0.782×|SCTAB|?8.524×|WAl|.

Abstract: A method for producing a hydrophilic aerogel granule is provided, which includes the steps of: mixing for the siloxane solvent mixture preparation, hydrolysis with proper acid catalyst, condensation dispersion by introducing a proper alkali catalyst into the mixture and dispersing it with hydrophobic dispersion solvent to obtain wet gel, aging under a specific temperature, disintegration dispersion for disintegrating the wet gel and dispersing it in the dispersion solvent, high temperature solvent exchange under ambient temperature with dispersion solvent, and solvent evaporation for removing the dispersion solvent.

Abstract: A composite oxide powder including a composition formula (1), wherein the ratio ?/? of a surface area value ? (m2/g) calculated by a BET one-point method to a surface area value ? (m2/g) calculated from a formula (2) is greater than 1.0 and equal to or less than 1.5 and the surface area value ? is equal to or less than 20 m2/g. ABO3-? (1) (wherein A is one or more types of elements (La, Sr, Sm, Ca and Ba), B is one or more types of elements (Fe, Co, Ni and Mn) and 0??<1); and surface area value ? (m2/g)=specific surface area value ?-surface area value ?(2) (the specific surface area value ? (m2/g) is a value in a total pore size range measured by a mercury intrusion method. The specific surface area value ? (m2/g) is a value in a range of pore sizes that are larger than a 50% cumulative particle size.

Abstract: Binder compositions for agglomerating iron ore fines are provided, the compositions comprising: one or more types of modified starch and one or more types of synthetic dry polymers. A process for preparing iron ore pellets with the binder compositions is also provided, the process comprising: (i) adding a binder composition to particulate iron ore to form a mixture; and (ii) forming the mixture into pellets.

Abstract: A method comprising a) drying a support material comprising silica at temperature in the range of from about 150° C. to about 220° C. to form a dried support; b) contacting the dried support with methanol to form a slurried support; c) subsequent to b), cooling the slurried support to a temperature of less than about 60° C. to form a cooled slurried support; d) subsequent to c), contacting the cooled slurried support with a titanium alkoxide to form a titanated support; and e) thermally treating the titanated support by heating to a temperature of equal to or greater than about 150° C. for a time period of from about 5 hours to about 30 hours to remove the methanol and yield a dried titanated support.

Abstract: There is disclosed an organic-free, metal-containing zeolite Beta with a silica-to-alumina ratio (SAR) ranging from 5 and 20, and a metal content of at least 0.5 wt. %. There is also disclosed a method of making such a zeolite Beta without organic structure directing agent (SDA). The metal, which may comprise Fe or Cu, can be found in amounts ranging from 1-10 wt. %. A method of selective catalytic reduction of nitrogen oxides in exhaust gases using the disclosed zeolite is also disclosed.

Abstract: A process for preparing a highly pure silicon by reduction of a calcium silicate slag using a source of aluminum is disclosed. The process involves forming a molten calcium silicate slag, reducing the calcium silicate slag to Si metal and forming a calcium aluminate slag, and separating the Si metal from the calcium aluminate slag.

Abstract: The invention relates to a process for preparing polycrystalline silicon, comprising introducing a reaction gas containing hydrogen and silane and/or halogen silane into a reactor, wherein the reactor comprises at least one heated carrier body, on which elementary silicon has been deposited by means of pyrolysis, forming the polycrystalline silicon. In a continuous process, waste gas is led out of the reactor and hydrogen recovered from said waste gas is fed to the reactor again as circulating gas. The circulating gas has a nitrogen content of less than 1000 ppmv. The invention further relates to polycrystalline silicon having a nitrogen component of less than 2 ppba.

Abstract: This disclosure relates to ultra-high performance diatomite products possessing very high silica specific volume, a characteristic which provides for high filtration performance, in terms of low unit consumption and long filtration cycle times. These novel products of this disclosure also show very low extractable metals for both the non-acid washed and the high purity (acid washed) grades. These characteristics are of particular value in the separation of solids from high purity liquids in electronic chemical, specialty beverage and life science applications. In addition to outstanding physical and chemical characteristics, these products also contain no detectable levels of cristobalite and have a wide range of permeabilities, and are produced from mineralogically impure ores containing high levels of alumina and iron oxide.

Abstract: A cerium-zirconium based mixed oxide composition have: (a) a Ce:Zr molar ratio of 1 or less, and (b) a cerium oxide content of 10-50% by weight. The composition has (i) a surface area of at least 18 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.11 cm3/g, after ageing at 1100° C. in an air atmosphere for 6 hours, (ii) a surface area of at least 42 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.31 cm3/g, after ageing at 1000° C. in an air atmosphere for 4 hours, and (iii) Dynamic Oxygen Storage Capacity (D-OSC) value as measured by H2-TIR of greater than 500 ?mol/g at 600° C. after aging at 800° C. in an air atmosphere for 2 hours. A process contacts the exhaust gas with the composition Another process is for preparing the composition.

Abstract: A cationic composite filter aid may include a silicate substrate, a silica precipitated on the silicate substrate, and a cationic surface modification of the precipitated silica. A method for making a cationic composite filter aid may include providing a silicate substrate, precipitating a silica onto the silicate substrate to form a composite filter aid, and cationically modifying the precipitated silica to form a cationic composite filter aid. A method for filtering a liquid may include providing a liquid for filtering and filtering the liquid through a cationically modified composite filter aid. The cationically modified composite filter aid may include a silicate substrate, a precipitated silica, and a cationic surface modification of the precipitated silica.

Abstract: Parallel reactor systems for synthesizing materials are disclosed. The reactor systems may include at least two reaction vessels and may be suitable for synthesizing materials produced from corrosive reagents, for example, Ziegler-Natta catalysts. Antechambers may be provided above the reaction vessels to help purge vapors produced by the corrosive reagents. Methods for preparing materials by use of such parallel reactor systems are also disclosed.

Abstract: Metal oxides-silica composite materials are synthesized by a co-precipitation method to serve as modified catalysts for converting ethanol into four-carbon hydrocarbons. The method includes mixing a liquid-phase silicon source and a metal precursor at different ratios so as to change the acid-base composition of the composite materials and thereby increase selectivity with respect to the four-carbon products.

Abstract: Embodiments provide a method for determining a chloride content of an alumina-based catalyst used for catalytic reforming. The method includes the step of combining nitric acid, isopropanol, and the alumina-based catalyst such that the alumina-based catalyst is dissolved in the nitric acid and the isopropanol to form a homogenized mixture. The alumina-based catalyst include chloride. The method includes the step of taking a conductivity measurement of the homogenized mixture using a pair of electrodes. The method includes the step of introducing a titrant solution comprising silver nitrate to the homogenized mixture such that a precipitate of silver chloride is formed. The method includes the step of determining a chloride concentration of the homogenized mixture based on the conductivity measurement of the homogenized mixture. The method includes the step of determining the chloride content of the alumina-based catalyst based on the chloride concentration of the homogenized mixture.

Abstract: The present invention relates to granular functionalized silicas, wherein the Hg pore volume (<4 ?m) is more than 0.80 ml/g, dQ3=10% is more than 400 ?m, dQ3=90% is less than 3000 ?m, the ratio of d50 without ultrasound exposure to d50 after 3 min of ultrasound exposure is <4.00 and the carbon content is 1.0-15.0% by weight. The inventive granular functionalized silicas can be used as a support material, especially as a support for enzymes.

Abstract: A method for producing a plate type metal-silica composite aerogel and a plate type metal-silica composite aerogel produced thereby in which the metal salt concentration and the basic catalyst concentration are adjusted to form a plate type intermediate first, and then an appropriate amount of a water glass solution is added, thereby enabling the plate type metal-silica composite aerogel to be produced in a short time under conditions of low temperature and atmospheric pressure, so that the process is simpler than the conventional production method, and the cost is reduced, which is excellent in economy. Also provided is a plate type metal-silica composite aerogel, which is produced by the claimed method and has excellent dispersibility that requires no additional surface modifier.

Abstract: Biocompatible silica inorganic sculptured extracellular nanomatrices (iSECnMs) of silica nanozigzags are deposited by glancing angle deposition (GLAD), to achieve induction of specific differentiation without growth factors. The nanostructure includes a plurality of nanozigzags. The nanozigzags include SiO2 and the nanozigzags having a pitch of 80 nm to 250 nm, and a contact depth of 90 nm to 260 nm. A method of cell therapy including substantia nigra organoids formed on silica iSECnMs is also provided.