278 results about "Silenes" patented technology

Catalysts and processes for forming catalysts for use in hydrogenating acetic acid to form ethanol. In one embodiment, the catalyst comprises a first metal, a silicaceous support, and at least one metasilicate support modifier. Preferably, the first metal is selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, titanium, zinc, chromium, rhenium, molybdenum, and tungsten. In addition the catalyst may comprise a second metal preferably selected from the group consisting of copper, molybdenum, tin, chromium, iron, cobalt, vanadium, tungsten, palladium, platinum, lanthanum, cerium, manganese, ruthenium, rhenium, gold, and nickel.

A process for selective formation of ethanol from acetic acid by hydrogenating acetic acid in the presence of first metal, a silicaceous support, and at least one support modifier. Preferably, the first metal is selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, titanium, zinc, chromium, rhenium, molybdenum, and tungsten. In addition the catalyst may comprise a second metal preferably selected from the group consisting of copper, molybdenum, tin, chromium, iron, cobalt, vanadium, tungsten, palladium, platinum, lanthanum, cerium, manganese, ruthenium, rhenium, gold, and nickel.

The invention relates to a method for producing flexographic printing forms by engraving a printing relief on a flexographic printing element that can be laser engraved, said element having a photochemically cross-linked relief layer. The relief layer is transparent and comprises oxidic, siliceous or zeolitic solid matter with a particle size between 1 and 400 nm in a quantity of between 0.1 and 8 wt. % in relation to the quantity of all components in the relief layer.

Treatment fluids for use in subterranean formations, particularly sandstone and other siliceous formations, may contain a source of fluoride ions to aid in mineral dissolution. In some cases, it may be desirable to generate the fluoride ions from a fluoride ion precursor, particularly a hydrofluoric acid precursor, such as a boron trifluoride complex. Methods described herein can comprise providing a treatment fluid that comprises an aqueous base fluid, a boron trifluoride complex, and a chelating agent composition, and introducing the treatment fluid into a subterranean formation,

Cleaning and multifunctional coating compositions containing hydrogen peroxide and an organosilane quaternary compound in aqueous formulations are used to improve water and soil repellency and residual antimicrobial activity. Various surfaces may be treated including metal, glass, plastics, rubber, porcelain, ceramic, marble, granite, cement, tile, sand, silica, enameled appliances, polyurethane, polyester, polyacrylic, melamine / phenolic resins, polycarbonate, siliceous, painted surfaces, wood, and the like.

A stemming for the tap hole of blast furnace is proportionally prepared from industrial corundum particles, silicon carbide particles, medium-temp asphalt particles, Suzhou clay powder, coke powder, high-Al powdered coal ash and tar oil through proportional mixing, stirring and vacuum extruding. It features low cost and high stability.

The composition for treating a siliceous substrate comprises: substantially water insoluble fluoro silane; an organic solvent in an amount sufficient for solubilizing the fluoro silane, and at least one ammonium and / or phosphonium compound, the weight ratio (ammonium and / or phosphonium compound / water insoluble fluoro silane) being greater than 0.005

A composition of matter wherein the composition comprises a siliceous substrate having silanols on the surface and a polymer selected from the group consisting essentially of a water soluble polymer, a water soluble copolymer, an alcohol soluble polymer, an alcohol soluble copolymer, and combinations of such polymers, wherein the polymer is chemically bonded to the siliceous substrate by a silane linking material having the general formulaO3 / 2SiQYthat is derived from an alkoxy-functional silane having the general formula(RO)3SiQXand processes for preparing the crosslinked polymer that is chemically bonded to the surface of the siliceous substrate.

The invention relates to an aluminum-silicon light heat insulation brick and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing 40-55 percent by weight of light alumina aggregate, 25-40 percent by weight of bauxite chamotte, 5-12 percent by weight of calcium aluminate cement, 8-13 percent by weight of organic polymer, 2-5 percent by weight of silicon powder, 0.05-0.15 percent by weight of water reducing agent and 15-25 percent by weight of water, calendering and molding by casting; curing under the condition of room temperature for 24-48 hours, demolding and drying at the temperature of 100-120 DEG C for 20-36 hours; and preserving heat at the temperature of 1,400-1,550 DEG C for 3-5 hours to obtain the aluminum-silicon light heat insulation brick. The preparation method has the advantages of wide raw materials, simple process and low production cost; the prepared aluminum-silicon light heat insulation brick has the advantages of high compressive strength, low volume density, low heat conductivity, high using temperature, low re-burning linear change rate, high thermal shock stability and the like; the product is applied to various industrial furnace heat insulation layers, has a wide application range and remarkably-reduced energy consumption and temperature outside a furnace, and can be safely and effectively produced.

The invention relates to a preparation method and application method of a hydrated calcium silicate seed crystal. The materials for preparing the hydrated calcium silicate seed crystal comprise a calcium material, a silicon material, deionized water, a dispersant, anhydrous ethanol and sodium hydroxide. The adopted calcium material is calcium oxide, the adopted silicon material is one of sodium silicate and diatomite, and the adopted dispersant is a poly-carboxylic acid high molecular polymer. The controlled factors comprise the ratio of calcium to silicon, the ratio of water to solid, the dosage of the dispersant, the reaction temperature, the reaction pressure and the reaction time. The product prepared by the method provided by the invention is suitable for a construction engineering adopting mixed material cement as a cementitious system, and has an obvious effect of promoting the development of the early strength of a mixed material cement base material, so that the application scope of the mixed material cement is expanded, the dilemma of solid waste emission is relieved, the cement production cost is reduced, the emissions of wastes during cement production are reduced, and the product is beneficial to low-carbonization and greening development of cement, and has good environmental protection benefits and social and economic benefits.

The invention relates to a filler composition and application thereof. The filler composition comprises a spherical siliceous micro powder filler and an angular siliceous micro powder filler, and can be used for preparing a copper clad laminate substrate and bonding sheet resin composition. The filler composition is formed by compounding the angular siliceous micro powder filler and the spherical siliceous micro powder filler, which have specific particle size distribution, the flowability of the composition and the sedimentary stability in a solution or resin system can be improved, the thickness uniformity and the component uniformity of the copper clad laminate substrate are improved, and not only the sagging and gummosis problems are solved, but also the production cost is reduced greatly.

The invention relates to a filler composition and application thereof. The filler composition comprises an angular siliceous micro powder filler, and can be used for preparing a copper clad laminate substrate and bonding sheet resin composition. The filler composition is formed by an angular silicon dioxide with the specific particle size distribution or the mixture of at least two angular silicon dioxides with different particle sizes and the specific particle size distribution, the flowability of the composition and the sedimentary stability in a solution or resin system can be improved, the coefficient of thermal expansion is reduced remarkably, the bonding interface between resin and an inorganic filler, the interlayer adhesiveness between laminates and the adhesive force between a resin layer and a copper foil are improved, and the production cost is reduced greatly.

[Problem] To provide a perhydropolysilazane making it possible to form a siliceous film with minimal defects, and a curing composition comprising the perhydropolysilazane.[Means for Solution] The present invention provides a perhydropolysilazane having a weight-average molecular weight of 5,000 to 17,000, characterized in that when 1H-NMR of a 17% by weight solution of said perhydropolysilazane dissolved in xylol is measured, the ratio of the amount of SiH1,2 based on the aromatic ring hydrogen content of the xylol is 0.235 or less and the ratio of the amount of NH based on the aromatic ring hydrogen content of the xylol is 0.055 or less, and a curing composition comprising the perhydropolysilazane. The present invention also provides a method for forming a siliceous film, comprising coating the curing composition on a substrate and heating.

An epoxidation catalyst was prepared by contacting the slurry of vanadium or titanium chert with an ion-exchangeable noble metal complex, and the above catalyst was obtained by contacting with O2, H2 and olefins without drying or roasting. For the epoxidation of alkenes.

This invention relates to a composition useful as a dentifrice comprising a surfactant agent consisting essentially of monoalkyl and dialkyl phosphate esters, wherein the ratio of monoesters to diesters is greater than 1, and optionally an abrasive agent consisting essentially of siliceous materials.

The nanometer hydrated calcium silicate paint consists of filming emulsion 37.0-39.0 wt%, pigment 5.07-6.20 wt%, talcum powder 6.50-7.50 wt%, hydrated calcium silicate powder 10.15-11.0 wt%, filming assistant 0.38-0.88 wt%, defoaming agent 0.4-0.9 wt% and water 34.52-40.50 wt%. The hydrated calcium silicate powder is prepared with cheap diatomite as siliceous material and lime as calcium material, and through dynamic hydrothermal process, and has low crystallization degree and very great specific surface area. Using the nanometer hydrated calcium silicate as stuffing for building paint can raise the adhesion force, water resistance, alkali resistance, water resistance, ageing resistance and antifouling performance of paint greatly and is favorable environment protection.

A well treatment fluid contains a surface modifying treatment agent having an anchor and a hydrophobic tail. The surface modifying treatment agent is an organophosphorus acid derivative. After the well treatment fluid is pumped into a well penetrating the subterranean formation, the anchor binds to the surface of the formation. The subterranean formation is a siliceous formation or a metal oxide-containing subterranean formation. The anchor bonds to a Si atom when the formation is a siliceous formation and to the metal of the metal oxide when the formation is a metal oxide-containing formation. After being bound to the surface of the formation, frictional drag within the well is reduced. This allows for faster recovery of formation fluids. The bonding of the surface modifying treatment agent onto the formation may further be enhanced by first pre-treating the formation with a non-aqueous fluid. By increasing the number of sites for the surface modifying treatment agent to bind onto the surface of the subterranean formation, productivity is improved.

The invention relates to a high-performance forsterite refractory raw material and a preparation method thereof. The method comprises the following steps: mixing 65-85 weight percent of fine magnesite powder with 15-35 weight percent of siliceous raw material fine powder, adding 1-10 weight percent of binding agent, and ball-milling for 1-3 hours to obtain a ball-milling material; then adding water being 3-10 weight percent of the ball-milling material into the ball-milling material, stirring, pressing to form a blank body, drying, and calcining at 1200-1400 DEG C to obtain a calcining material; grinding the calcining material to the particle size smaller than 0.045mm, and adding an additive being 0.2-2 weight percent of the calcining material and the binding agent being 1-10 weight percent of the calcining material, and ball-milling to obtain a secondary ball-milling material; and adding 3-10 weight percent of water into the secondary ball-milling material, stirring, pressing to form a blank body, drying, and secondary calcining at 1450-1650 DEG C to obtain the high-performance forsterite refractory raw material. The raw material has the advantages of wide sources, low production cost and easiness in sintering, and the prepared high-performance forsterite refractory raw material has large volume density, low porosity and stable high temperature properties.

The invention belongs to the metallurgical field, and particularly relates to a slag former and a method for preparing the same. The technical problem solved by the invention is to provide a slag former with quick slagging by utilizing steelmaking sludge as a main material. The slag former consists of the following materials in weight percentage: 25 to 35 percent of steelmaking sludge, 25 percent of manganese ore with high silica, 34 to 45 percent of quartz sand and 5 percent of magnesium chloride. The average slag forming time of the slag former is 4.4 minutes, which is 1.5 minutes shorter than the prior slaggng method, and the average dephosphorizing efficiency is improved by 6.75 percent. Therefore the slag former maximally recovers iron in the sludge and lowers iron and steel consumption.

A modified asphalt composition comprising a naphthenic asphalt, and a high-vinyl block copolymer is presented. The modified asphalt composition is prepared by combining a naphthenic asphalt and a high-vinyl block copolymer. Further an asphalt concrete is presented, such concrete comprises an asphalt, a functionalized block copolymer, and a siliceous aggregate. A diblock copolymer is presented, such copolymer comprises a vinyl block comprising conjugated vinyl aromatic units, a diene block comprising conjugated diene units and substantially devoid of a tapered block section between the vinyl block and the diene block wherein the diblock copolymer comprises a vinyl content of at least about 20%, and a molecular weight of at least about 50,000.

The invention discloses a remote procedure call (RPC) design-based inorganic synthetic quartz plate and a preparation technology thereof. The RPC design-based inorganic synthetic quartz plate is characterized in that a quartz powder decorating plate is prepared from a binding material, an inorganic aggregate, inorganic powder, an admixture and water according to a certain ratio, and the product can be prepared according to a certain technological process. By adopting the RPC design-based inorganic synthetic quartz plate, an implementation scheme of an inorganic artificial stone of taking common concrete as a basic theory, and then carrying out fussy and complicated surface treatment process is abandoned; the inorganic artificial stone is designed and manufactured by an RPC preparation theory as a core concept; the natural quartz powder is adopted as an active silicon material, so as to reduce the material cost. By implementation of the method, not only is a new direction of recycled efficient utilization of the quartz powder exploited, but also a new design concept is initiated for preparation of the synthetic inorganic plate; meanwhile, a new application way is also initiated for practice and application of the RPC theory.

A repeated "soak and dry" selectivation process for preparing a modified metallosilicate catalyst composite is disclosed comprising of a mixture of amorphous silica, alumina and a pore size controlled metallosilicate useful for alkylaromatic conversion. The process comprises (a) contacting an intermediate pore metallosilicate with an organosilicon compound in a solvent for a specific duration and then recovering the solvent, (b) combining the organosilicon compound treated metallosilicate with water and then drying the catalyst, (c), repeating the steps a) and b) above and (d) calcining the catalyst in an oxygen containing atmosphere sufficient to remove the organic material and deposit siliceous matter on the metallosilicate. In a another embodiment, when the organosilicon compound is water soluble, step (b) may be avoided.

A heavy-duty vehicle tire comprising a tread consisting of a crosslinked rubber composition comprising a reinforcing filler of siliceous type and a synthetic polyisoprene modified by grafting with a compound comprising at least one group Q, and at least one group A, which are joined to one another by at least one and preferably one “spacer” group Sp, in which:Q comprises a dipole containing at least one and preferably one nitrogen atom,A comprises an associative group comprising at least one nitrogen atom,Sp is an atom or group of atoms forming a bond between Q and A.The heavy-duty vehicle tire according to the invention has a satisfactorily improved rolling resistance / wear resistance compromise.

A well treatment fluid contains a surface modifying treatment agent having an anchor and a hydrophobic tail. The surface modifying treatment agent is an organophosphorus acid derivative. After the well treatment fluid is pumped into a well penetrating the subterranean formation, the anchor binds to the surface of the formation. The subterranean formation is a siliceous formation or a metal oxide-containing subterranean formation. The anchor bonds to a Si atom when the formation is a siliceous formation and to the metal of the metal oxide when the formation is a metal oxide-containing formation. After being bound to the surface of the formation, frictional drag within the well is reduced. This allows for faster recovery of formation fluids. The bonding of the surface modifying treatment agent onto the formation may further be enhanced by first pre-treating the formation with an aqueous fluid. By increasing the number of sites for the surface modifying treatment agent to bind onto the surface of the subterranean formation, productivity is improved.

The invention discloses a siliceous composite plate, and a preparation method and application thereof. The siliceous composite plate comprises, by weight, 60%-70% of silicon carbide / silicon nitride / silicon oxide, 10%-15% of zirconium oxide, 2%-4% of manganese oxide, 3%-3.5% of titanium oxide, 1%-2% of magnesium oxide, 1.5%-3% of alumina, 1%-3% of yttrium oxide and 2%-10% of adhesive. The siliceous composite plate has the advantages of being resistant to high temperature, small in deformation, high in strength and oxidation-resistant capability and regular in appearance and remarkably prolonging service life, and solves the problems that in the prior art, a fire-resistant thermal insulation material is poor in oxidation resistance, cracks easily, and is poor in thermal insulation performance and high-temperature bending strength and the like. The siliceous composite plate can be applied to waste incineration furnaces, industrial kilns, boilers, smelting furnaces, engines and power station combustion furnaces and has the capability of being resistant to any thermal shock.

The invention provides a nano silicon thermal insulation material. The nano silicon thermal insulation material comprises a high temperature layer and a low temperature layer which is composited onto the high temperature layer; the low temperature layer consists of 60 to 80 parts by weight of nano silicon dioxide, 5 to 15 parts by weight of inorganic fibers and 15 to 35 parts of carbon black; the high temperature layer consists of 60 to 80 parts by weight of nano silicon dioxide, 5 to 15 parts by weight of inorganic fibers and 15 to 35 parts of an infrared shading agent; the infrared shading agent is one or more of titanium dioxide, zirconia, silicon carbide and potassium hexatitanate whisker. According to the nano silicon thermal insulation material, the effective extinction coefficient and the temperature resistance of different infrared shading agents of different types are adequately utilized, and the nano silicon thermal insulation material with ultralow heat conduction coefficient which can be used in a high temperature area can be prepared by utilizing different infrared shading agents of different types in a gradient manner.