258 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.

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 formula

O_3/2SiQY

that is derived from an alkoxy-functional silane having the general formula

(RO)₃SiQX

and processes for preparing the crosslinked polymer that is chemically bonded to the surface of the siliceous substrate.

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.

[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 SiH_1,2 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.

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 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.

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.

The invention relates to a silicon refractory material with composition proportions of 3.0-1.0 mm and 30 to 55 percent of natural silica, 3.0 to 1.0mm and 0 to 15 percent of waste silica brick particles, 1.0 to 0.09mm and 10 to 25 percent of the natural silica, 3.0 to 1.0 mm and 0 to 15 percent of the waste silica brick particles, 10 to 25 percent of the natural silica plus waste silica brick powder plus calcinations silica less than 0.09mm, 1 to 5 percent of non-aluminum high C3S cement or calcium hydroxide powder, SiO2 no less than 98 percent, 0 to 5 percent of silica micropowder with median particle size D50 no more than 10 Mum, 1 to 5 percent of silica fume with SiO2 no more than 96 percent, 0.05 to 1.0 percent of high-efficiency water reducing agent and 0.03 to 1.0 percent of organic binder; 1 to 2 percent of fluorite, 0 to 6 percent of calcium sulfate, 0 to 4 percent of magnesium sulfate or magnesium oxide are doped as mineralizer. The production process comprises the process that after weighing, mixing and melting, forming and drying, the raw material is roasted as finished products under 1350 to 1460 DEG C for 10 to 36 hours. The invention has the advantages of good forming, rapid demoulding speed and excellent high temperature performance, which is suitable for silicon refractory material for glass manufacture, and large and special shaped silicon dioxide refractory material products.