122 results about "Alkaline earth oxides" patented technology

The invention discloses a copper-silicon catalyst as well as a preparation method and application thereof, and the copper-silicon catalyst comprises the following components in percentage by weight: 43-79wt% of silicon dioxide; the content of copper oxide is 15-35 wt%; the content of the auxiliary agent A is 3-10 wt%; the auxiliary agent B accounts for 3-12 wt%; the auxiliary agent A comprises one or more of alkali metal or alkaline earth metal oxides; and the auxiliary agent B comprises one or more of VB to VIIB group metal oxides. The raw materials of the catalyst are cheap and easy to obtain, the reaction condition is mild, the catalyst is environment-friendly, and the prepared catalyst is small in copper species particle size, high in dispersity, high in conversion rate and selectivity and good in stability.

The invention provides a preparation method and application of ceramic slurry for high-temperature bonding of aluminum nitride ceramics, and relates to the technical field of high-temperature ceramic materials.The preparation method comprises the following steps that firstly, an organic carrier is prepared, a polymer binder, an organic solvent, a plasticizer and a dispersing agent are weighed according to the weight ratio and stirred at the temperature of 60-70 DEG C till complete dissolution and clarification are achieved for use; 2, an inorganic functional phase is prepared, aluminum nitride powder, yttrium oxide powder and alkaline earth metal oxide powder are weighed according to the weight proportion and placed in a ball milling tank to be evenly mixed, the obtained ceramic slurry serves as a bonding layer, the tolerable temperature can reach 1000 DEG C or above and is far higher than that of metal brazing filler metal, and the ceramic slurry is suitable for severe environments such as aerospace and high-temperature sensors. The main components of the bonding layer are consistent with the base material, and the thermal expansion coefficient is highly matched, so that the thermal stress can be greatly relieved, and the failure of the device caused by thermal fatigue in the temperature cycle is avoided.

The invention discloses a corrosion-resistant sealing glass material for a lithium battery and a preparation method of the corrosion-resistant sealing glass material, and the sealing glass material comprises the following components in molar percentage: 20%-29% of SiO2, 12%-25% of Al2O3, 12%-25% of B2O3, 5%-15% of alkali metal oxide and 5%-15% of alkaline earth metal oxide. Wherein the alkali metal oxide comprises 1%-5% of LiO2, 1%-5% of K2O and 1%-5% of Na2O; the alkaline earth metal oxide comprises 1%-10% of BaO, 0%-5% of CaO and 0%-5% of SrO. By accurately controlling the content of each component, the sealing glass material with good sealing performance and excellent corrosion resistance is obtained, the corrosion of electrolyte to the glass material can be remarkably inhibited, and the stability and reliability of lithium battery products are remarkably improved; and the glass material has a thermal expansion coefficient matched with related metal, so that the thermal stress in the sealing process can be reduced.

The present invention discloses a waste plastic oil hydrofining catalyst and a preparation method thereof, the catalyst comprises an active component and a carrier, the total mass of the catalyst is 100%, the active component accounts for 10 wt%-30 wt%, the carrier accounts for 70 wt%-90 wt%, the carrier comprises a Ce (at) Cu-M / Al2O3 composite oxide, and M is an alkali metal oxide or an alkaline earth metal oxide. According to the present invention, the synthesized Ce (at) Cu-CaO / Al2O3 composite oxide is adopted in the carrier material, such that the chlorine resistance of the catalyst is improved, the dispersity and the carbon deposition resistance of the active component on the catalyst surface are significantly improved, the high hydrogenation activity of the catalyst is obtained, the hydrogenation catalysis performance of the catalyst is effectively improved, and the waste plastic oil hydrofining dechlorination effect is improved.

The invention discloses a friction material for brake pads and application thereof and belongs to the technical field of friction materials. The composite material is prepared from the following components in percentage by weight: 15 to 20 percent of composite fiber of chopped carbon fiber and ceramic fiber, 1 to 3 percent of carboxylation modified multi-walled carbon nanotube, 8 to 12 percent of polyimide modified phenolic resin, 0.5 to 1 percent of silane coupling agent KH-550, 5 to 8 percent of bionic multilayer graphene capsule, 3 to 5 percent of rare earth doped molybdenum silicide composite material, 8 to 12 percent of scaly soft iron powder and 10 to 15 percent of thermoelectric regulation type ZrO-BeO composite material. The catalyst comprises the following components in percentage by weight: 2-4% of porous molecular sieve loaded nano SbO, 5-10% of composite alkaline earth metal oxide, 5-10% of a shaped phase change material and 0.1-0.5% of a high-thermal-conductivity silicon carbide coating, a micron-sized through channel network with a high-thermal-conductivity silicon carbide coating is constructed in the material, and a shaping phase change material is combined, so that a multi-stage synergistic heat management mechanism of conduction heat dissipation, phase change heat storage and capillary flow enhanced heat dissipation is formed, friction heat can be quickly guided out from the surface and uniformly dispersed, and local high temperature and thermal stress are greatly relieved.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing dicyandiamide by urea pyrolysis with anti-scaling properties. The method includes a reaction process using urea, alkaline earth metal oxides, and a scale inhibitor dopant as raw materials. The scale inhibitor dopant includes at least one of silicon dioxide and titanium dioxide, and its weight accounts for 0.1% to 5% of the weight of the alkaline earth metal oxides. Experiments show that introducing a scale inhibitor dopant into the reaction system can alter the surface tension of the isocyanate melt, helping to improve the surface properties and rheological state of the intermediate melt. This reduces material adhesion and aggregation on the reactor wall, lowers the risk of scaling and clogging, and may even eliminate scale buildup on the reactor wall, thereby improving the stability of continuous production.

To provide a composition containing a novel ingredient that can bring about at least an acceptable level of sebum control in keratinous substances such as skin. [Solution] The present invention relates to a composition comprising (a) (i) at least one inorganic oxide, preferably a metal oxide, more preferably an alkaline earth metal oxide, and (ii) at least one fatty acid or a salt thereof, preferably a saturated fatty acid or a salt thereof, more preferably a metal salt of a saturated fatty acid, and (b) at least one second powder selected from particles containing silica and hydroxyapatite. The composition according to the present invention can provide at least an acceptable level of sebum control to keratinous substances such as skin.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

The present invention relates to a coagulant for cementitious compositions, in particular cementitious compositions having a binder as a source of aluminate and / or sulphoaluminate, the coagulant comprises a source of an alkali metal carbonate, a metal sulfate, an alkali metal hydroxide, and optionally an alkali metal bicarbonate, an alkaline earth metal hydroxide, or an alkaline earth metal oxide. The invention also relates to cementitious compositions having a binder as a source of aluminate and / or sulphoaluminate and the coagulation accelerator according to the invention.

A mixture of pyrolyzed bio-aggregate, and a binder comprising alkaline earth metal oxide and / or alkaline earth metal hydroxide, and cementitious material in a ratio of at least 50:50, preferably 75:25

A variety of methods, systems, and compositions are disclosed, including, in one embodiment, a cement composition comprising an alkaline earth metal oxide, a soluble salt, a water-proofing agent comprising a divalent cation carbonate coated with fatty acid, and water. In other embodiments, the cement composition is introduced and allowed to set in a subterranean formation.

The invention provides a spontaneous heating composite synergist as well as a preparation method and application thereof. The spontaneous heating composite synergist is prepared from the following components in parts by weight: 20 to 40 parts of a component A, 20 to 40 parts of a component B and 30 to 40 parts of a component C, wherein the component A comprises an alkali metal salt inner core and a first silane coupling agent and aluminate coupling agent composite shell layer which coats the outer surface of the alkali metal salt inner core through chemical bonds; the component B comprises an alkaline earth metal oxide core and a second silane coupling agent shell layer which coats the outer surface of the alkaline earth metal oxide core through a chemical bond; and the component C comprises an active metal core and a third silane coupling agent shell layer coated on the outer surface of the active metal core through a chemical bond. The self-heating composite synergist is subsequently applied to in-situ gasification, in-situ dry distillation, superheated steam gasification and supercritical water gasification of deep coal and has a relatively good heat-increasing synergistic effect.

The invention discloses a catalyst for synthesis of tert-butyltoluene as well as a preparation method and application of the catalyst. The catalyst comprises a single-layer-structure MWW molecular sieve, a binder, a rare earth metal oxide and an alkaline earth metal oxide. The catalyst has the characteristics of high active site utilization rate and adjustable pore structure, and shows high activity and high para-position product selectivity in the alkylation reaction of toluene and isobutene.

Steel flat product for cold forming consisting of a steel substrate coated with a protective coating, wherein the protective coating consists of an inner Al-Si-containing and an outer alkaline earth oxide and / or transition metal oxide-containing layer, and wherein the steel substrate has a composition containing (in wt.%): - up to 0.09 carbon - up to 0.3 silicon - up to 0.9 manganese - up to 0.025 phosphorus - up to 0.02 sulfur - up to 0.1 aluminum - up to 0.14% titanium and / or niobium - up to 0.001 boron, and possibly - further alloying elements selected from the group up to 0.01 N, up to 0.15 Cu, up to 0.15 Cr, up to 0.15 Ni, up to 0.025 Mo, and / or up to 0.05 Sn, and - Residual iron and unavoidable impurities.

The invention discloses an iron-based catalyst, a preparation method of the iron-based catalyst, and an electrothermal catalytic synthesis ammonia method and system, and belongs to the field of synthesis ammonia catalysts, the iron-based catalyst comprises the following components by mass: 30-90% of a catalyst main component FeO1-x, 5-40% of a catalytic promoter and 10-80% of a conductive additive; the value range of x in the FeO < 1-x > is 0.01 to 0.1; the catalytic promoter comprises potassium oxide, aluminum oxide and alkaline earth metal oxide; the conductive auxiliary agent comprises at least one of a carbon-containing material and a conductive metal compound. The catalytic activity of the iron-based catalyst is effectively improved mainly through catalyst component design and dosage optimization. When the device is applied to an ammonia synthesis process, low-temperature, low-pressure and efficient electro-thermal catalytic ammonia synthesis is realized under the condition of no external heating, the ammonia production rate is remarkably increased, meanwhile, the ammonia production energy consumption is reduced, and the industrial application prospect is excellent.

A co-electrolysis system according to one embodiment of the present invention may comprise: a mixed gas supplier for supplying a mixed gas containing carbon dioxide and water vapor; a co-electrolysis device for co-electrolyzing the mixed gas to generate a synthetic gas containing carbon monoxide and hydrogen; a carbonator for mixing an alkaline earth metal oxide-containing material with the synthetic gas and carbonating the alkaline earth metal oxide-containing material and carbon dioxide to obtain a carbonate; and a calciner for calcining the carbonate to regenerate the carbonate into an alkaline earth metal oxide-containing material.

The present application relates to a kind of dehydrogenation catalyst and its preparation method and application and a kind of preparation of alkenyl aromatic hydrocarbon method, the catalyst includes the following components by weight percentage: (a) 65~86% Fe2O3;(b) 6~12% alkali metal oxide;(c) 7~13% CeO2;(d) 0.5~4% alkali earth metal oxide;(e) 0.2~3% VIB group metal oxide;(f) 0.1~2% VB group metal oxide;(g) 0.05~1% heavy rare earth oxide;(h) 0.001-0.2% acidic oxide;(i) 0~4% binder.The catalyst of the present application has better catalytic activity in low water ratio conditions for preparing alkenyl aromatic hydrocarbon or olefin, and the selectivity of alkenyl aromatic hydrocarbon or olefin is high.

Support for firing a ceramic powder comprising an alkali metal oxide and / or alkaline-earth metal oxide, said support comprising a porous ceramic body forming a cavity or a container for said powder, said porous body being coated on at least part of its inner surface with a ceramic coating, wherein said porous ceramic body has an open porosity of between 10% and 40% and a median equivalent pore diameter of between 0.1 and 30 micrometers and said ceramic coating comprises grains comprising a crystalline borocarbonitride phase, a binder phase of said grains comprising a non-alkali metal phosphate and preferably ceramic oxide grains or one or more ceramic oxide phases.

The invention discloses a normal-temperature and normal-pressure preparation method of a carbon dioxide trapping material for solid waste derived direct air trapping, and relates to the technical field of preparation of carbon dioxide trapping materials. According to the method, industrial solid wastes (such as converter steel slag, nickel slag and copper slag) containing alkali metal or alkaline earth metal oxide components (such as MgO, CaO and FeO) are taken as raw materials, solid waste powder with the particle size of 100-800 microns is obtained through crushing and screening, and the solid waste powder and an interface regulating agent (such as silicate or aluminate compound) are subjected to dry mixing at normal temperature and normal pressure to form a surface interface regulating layer; then pre-carbonation induction treatment is carried out, so that a discontinuous carbonate reaction layer is formed on the surface layer of the powder, and the internal activity is kept; and finally, carrying out structure stabilization treatment to obtain the carbon dioxide trapping material. The whole preparation process does not need pressurization or high-temperature calcination, the cost is low, the energy consumption is low, the material realizes carbon dioxide capture through a reversible carbonation reaction under a direct air capture working condition, and the material has the advantages of stable structure and good cycle performance.

A firing support for a ceramic powder of alkali and / or alkali-earth oxide comprising a porous ceramic body for containing said powder, said body comprising a ceramic material consisting of ceramic grains linked by a matrix; said matrix representing by mass between 5% and 50% of said material and comprising a crystalline nitride phase of chemical formula MsAltOuNv, where M is a chemical element selected from Si, Mg, Li, Zr, and s, t, u and v are stoichiometric indices between 0 and 1 and normalized with respect to the highest, and where s+t > 0, and u ≥0, and v> 0; said grains of equivalent diameter greater than 150 micrometers and less than 300 micrometers representing by volume at least 10% of said material; said body having an open porosity of between 5 and 40%, and a median equivalent pore diameter of between 0.1 and 15 micrometers. No figure

The invention relates to a preparation method and application of an ordered mesoporous composite oxide carrier, and relates to the technical field of inorganic functional materials and heterogeneous catalysis. The carrier consists of alkaline earth metal oxide, rare earth metal oxide and AlO, and is prepared by adopting a solvent evaporation induced self-assembly method. The preparation method comprises the following steps: dissolving a template agent, an aluminum source, and soluble salts of alkaline earth metal and rare earth metal in a mixed solution of ethanol and dilute nitric acid, evaporating and self-assembling to form xerogel, and carrying out two-stage temperature-controlled roasting: carrying out low-temperature pyrolysis in an inert atmosphere, heating to 1000 DEG C in a low-oxygen-concentration atmosphere, and carrying out high-temperature treatment, so as to obtain the catalyst. And finally obtaining the ordered mesoporous composite oxide carrier. The carrier has excellent thermal stability, and can still keep a regular mesoporous structure, a high specific surface area and a high pore volume after being roasted at a high temperature of 1000 DEG C. The catalyst for hydrogen production through ammonia decomposition, which is prepared by loading Ni and Co active metals and Mo and W assistants, shows high activity and excellent thermal stability under a low-temperature condition, and has no performance attenuation in 200-hour long-period operation.

The invention relates to a silicate glass comprising 35 to 45% by weight of silica (SiO2), up to 15% by weight of molybdenum trioxide (MoO3), 4 to 7% by weight of zirconium dioxide (ZrO2), 1 to 3.5% by weight of phosphorus pentoxide (P2O5), and 14 to 28% by weight of one or more alkali metal oxides and / or one or more alkaline earth metal oxides, with respect to the total weight of the glass. The invention also relates to a method for increasing the solubility of molybdenum in a glass melt.

Provided is an exhaust gas purification catalyst that suppresses phosphorus poisoning and improves long-term durability. The exhaust gas purification catalyst includes a phosphorus collection layer and a catalyst layer containing at least one precious metal element Mp selected from the group consisting of Pt, Pd, and Rh, wherein the phosphorus collection layer is arranged on the upper layer side and / or the upstream side with respect to the catalyst layer; the phosphorus collection layer contains a composite oxide containing Al and an alkaline earth metal element Ma that includes Mg and that may include at least one selected from the group consisting of Ca, Sr, and Ba, and having a cubic spinel structure belonging to the space group Fd-3m; the composite oxide has a Ma / Al molar ratio in a range of 0.02 or more and 0.60 or less; and the composite oxide has a peak derived from the cubic spinel structure belonging to the space group Fd-3m of the composite oxide between a diffraction angle 2θxMaO that is a position of a peak derived from an alkaline earth metal oxide MaO and a diffraction angle 2θxAl2O3 that is a position of a peak derived from an aluminum oxide Al2O3 in an X-ray diffraction spectrum.

The present application provides a heavy oil hydrodemetallization transition catalyst, a preparation method and a grading application method thereof, the catalyst comprising a carrier and an active component, the carrier being gamma Al2O3-SiO2 containing alkali metal or alkaline earth metal oxide, and the active component being NiO and MoO3. The heavy oil hydrodemetallization transition catalyst can pre-decompose metal-containing residue macromolecules, improve the accessibility of metal-containing molecules to the active centers of the catalyst, and make nickel and vanadium be removed as much as possible and deposited in the demetallization agent bed layer through a reasonable grading method, so as to further improve the metal removal rate, reduce the migration of nickel and vanadium after removal, effectively protect the main catalyst, and effectively prolong the operation cycle of the residue oil hydrogenation device.

The application provides a seed crystal for carbon dioxide fixation, and a preparation method and application thereof, and belongs to the technical field of environmental protection and water treatment. The seed crystal comprises a carrier material and basic active sites loaded on the carrier material; and the material of the basic active sites comprises one or more of alkali metal oxides and alkaline earth metal oxides. The seed crystal provided by the application can be applied to a seed crystal granulation process, the basic active sites on the surface of the seed crystal can consume a large amount of hydrogen ions, accelerate the dissolution and hydrolysis process of gaseous carbon dioxide, convert the gaseous carbon dioxide into carbonate ions in a high-efficient manner, and then induce metal ions to crystallize on the surface of the seed crystal in the form of carbonate precipitation, so that carbonate granules are formed, and the mineralization and fixation of carbon dioxide and the high-efficient removal and granulation recovery of metal ions in wastewater are simultaneously achieved.

A coating system and a method of forming the same are provided. The coating system may be disposed on a surface of a substrate. The coating system may include: a bond coat on a surface of a substrate; a thermal barrier coating on the bond coat, the thermal barrier coating defining a plurality of elongate surface connecting voids; and a protective composition disposed in at least some of the plurality of elongate surface connecting voids of the thermal barrier coating. The protective composition may include an oxide or a mixture of oxides including an alkaline earth element and at least one selected from the group consisting of aluminum, gallium, or a combination of aluminum and gallium.

The purpose of the present invention is to provide an exhaust gas purification catalyst composition which has improved heat resistance. In order to achieve this purpose, the present invention provides an exhaust gas purification catalyst composition which contains a composite that contains a Zr-based oxide, an Al oxide that is present independently of the Zr-based oxide, an alkaline earth metal oxide that is present independently of the Zr-based oxide, and a platinum group element, wherein: the content of Al in the composite in terms of oxide is 1% by mass to 15% by mass inclusive based on the mass of the composite; the content of the alkaline earth metal element in the composite in terms of oxide is 0.1% by mass to 7% by mass inclusive based on the mass of the composite; and the X-ray diffraction pattern of the exhaust gas purification catalyst composition after a heat treatment satisfies formula (1) 1 ≤ IA / IB (wherein IA represents the integrated intensity of a peak located at 2θ = 27.0°-29.0° and IB represents the integrated intensity of a peak located at 2θ = 29.0°-30.8°).

The application discloses a 2,5-dichlorotoluene isomerization catalyst, wherein the carrier of the catalyst is a multi-stage pore hydrogen type molecular sieve, the active component is zirconium oxide, the cocatalyst is alkaline earth metal oxide, the total loading amount of the zirconium oxide and the alkaline earth metal oxide is 1-5 wt%, the molar ratio of zirconium and the alkaline earth metal is 10:0-0:10, and the multi-stage pore hydrogen type molecular sieve is obtained by modifying a hydrogen type molecular sieve with an organic acid. Through the organic acid dealumination modification, mesoporous channels can be effectively constructed in the molecular sieve crystal, the specific surface area, mesoporous pore size and pore volume of the molecular sieve are increased, the diffusion of macromolecules in the channels is greatly enhanced, and the carbon deposition inactivation of the catalyst is inhibited; the active component can provide more catalytic active sites, improve the catalytic activity of the catalyst, and the cocatalyst has a positive influence on the acidity, carbon deposition and other properties of the catalyst; the highest conversion rate of 2,5-dichlorotoluene reaches 59.14%, and the total selectivity of dichlorotoluene reaches 37.77%.

The invention discloses glass encapsulation slurry and a preparation method and application thereof, and belongs to the technical field of encapsulation slurry, the glass encapsulation slurry comprises the following components by mass: 60-70% of glass powder, 20-25% of a solvent, 6-12% of resin, 0.5-2% of a leveling agent, and 0.5-2% of a dispersant; the glass powder comprises the following components in percentage by mass: 51-66% of silicon oxide, 10-15% of boron oxide, 6-15% of alkaline earth metal oxide, 11-18% of alkali metal oxide, 1-3% of a stabilizer and 1-3% of a clarifying agent; the alkali metal oxide comprises lithium oxide and sodium oxide in a mass ratio of (1-3): (10-15); the alkaline earth metal oxide comprises barium oxide and calcium oxide in a mass ratio of (5-10): (1-5); the stabilizer comprises zirconium oxide; the clarifying agent comprises cerium oxide. The glass encapsulation slurry has a wide use window in the application field of electronic components.

The present application relates to the technical field of carbon dioxide removal from flue gas, and is a method and device for removing carbon dioxide from flue gas by supergravity mineralization, the former comprising: preparing a calcium-containing mineralization solution; reacting the calcium-containing mineralization solution with flue gas containing CO2 to remove CO2 from the flue gas, obtaining a suspension containing calcium carbonate and purified gas; and separating and filtering the suspension containing calcium carbonate to obtain superfine calcium carbonate; and the latter comprising a solid-liquid separator, a supergravity mineralization reactor, a liquid-solid separator, a filter and a heat exchanger. The present application uses an efficient reaction device to make CO2 in flue gas react with raw materials containing alkaline or alkaline earth metal oxides to generate carbonates, thereby being solidified and sealed for use, without the need for a capture and purification process, directly converting CO2 in flue gas into green carbon sequestration calcium carbonate, which can achieve efficient separation of carbon dioxide from flue gas in power plants, and can also achieve resource recycling and efficient utilization of CO2 and carbon, achieving the goal of emission reduction.