925 results about "Sesquioxide" patented technology

The invention provides a high selectivity catalyst used for catalyzing and completely oxidizing formaldehyde with low concentration at room temperature. The catalyst can catalyze formaldehyde completely so as to lead the formaldehyde to be converted into carbon dioxide and water at room temperature. In addition, the conversion rate of formaldehyde remains 100% within a long period of time, without complex auxiliary facilities such as light source, a heating oven and the like, and external conditions. The catalyst comprises three parts which are inorganic oxide carrier, noble metal component and auxiliary ingredient. Porous inorganic oxide carrier is one of cerium dioxide, zirconium dioxide, titanium dioxide, aluminium sesquioxide, tin dioxide, silicon dioxide, lanthanum sesquioxide, magnesium oxide and zinc oxide or the mixture thereof or composite oxide thereof, zeolite, sepiolite and porous carbon materials. The noble metal component of the catalyst is at least one of platinum, rhodium, palladium, gold and silver. The auxiliary ingredient is at least one of the alkali metals of lithium, sodium, kalium, rubidium and cesium. The loading of the noble metal component used in the catalyst of the invention is 0.1 to 10% according to weight converter of metal elements and the selective preference is 0.3 to 2%. The loading of the auxiliary ingredient is 0.2 to 30% according to weight converter of metal elements and the selective preference is 1 to 10%. When the loading of the auxiliary ingredient is lower than 0.2% or higher than 30%, the activity of the catalyst for catalyzing and oxidizing formaldehyde at room temperature is decreased remarkably.

The invention discloses anion powder which includes the following components: by weight, 10-15 parts of coral fossil, 10-15 parts of tourmaline, 30-50 parts of opal, 5-10 parts of serpentine, 2-4 parts of medical stone, 2-4 parts of odd ice stone, 2-4 parts of radiobarite, 2-4 parts of king stone, 3-6 parts of shell, 15-25 parts of diatomite, 2-4 parts of iron sesquioxide, 2-4 parts of aluminium sesquioxide, 2-4 parts of zirconium oxide and 2-4 parts of zirconium phosphate. Air ions generated by the anion powder prepared is high in solubility and is not easy to modify at high temperature and long in effects, and original characters of products cannot be modified when used with other functional materials.

A method for extracting metal from bismuth-contained multi-metal material is carried out by leaching out copper and tellurium from bismuth-contained multi-metal by sulfuric acid, adding into chlorinating agent and oxidant to leach out metal bismuth, extracting silver from leaching-out slag with AgCl, PbSO4 and PbC12, adding ammonia water into leaching-out liquid, adjusting pH value to 1.5 to obtain bismuth oxychloride slag with 70% bismuth content, smelting into coarse bismuth by firing method or machining to obtain high-purity bismuth sesquioxide, adjusting pH value to 4.5 by Na2CO3, depositing tellurium to obtain tellurium dioxide and copper-contained solution, and electrically depositing to obtain copper powder with copper-contained content90%. It adopts wetting and firing metallurgical technology, has higher metal recovery rate and excellent leaching-out separation effect and effluent circulating utilization and no environmental pollution.

The invention discloses high-manganese high-nitrogen low-nickel stainless steel plate blank continuous casting crystallizer covering slag which comprises the following components in percentage by weight: 54-57% of wollastonite, 9-13% of fluorite, 9-13% of sodium carbonate, 0-1% of lithium carbonate, 5-7% of glass dust, 8-12% of vanadine soil, 2.5-2.7% of soot carbon and 3-3.5% of graphite, and comprises the chemical components in percentage by weight: 31.9-34.9% of calcium oxide, 32.1-35.1% of silicon dioxide, 7.3-8.3% of aluminium oxide, 0.5-1.5% of magnesium oxide, 0.5-1.4% of iron sesquioxide, 4.4-6.4% of fluorion, 6.5-7.5% of sodium oxide, 0-0.39% of lithium oxide, 4.5-6.0% of fixed carbon and 4-7% of gas volatile matters. The alkalinity of the covering slag, namely the ratio of CaO to SiO2, is 0.91 to 1.00, the melting point of the covering slag is 1100 DEG C to 1160 DEG C, and the viscosity of the covering slag is 0.3 to 0.6 Pa.s at 1300 DEG C. The invention can solve the problems of easy crusting, slag entrainment, slag inclusion, slag sticking on casting blank surfaces, bubbles under skins, cracks, deep chatter mark, felting, bleed-out, and the like of the covering slag in the crystallizer during high-manganese high-nitrogen low-nickel stainless steel plate blank continuous casting, and has the advantages of uniform and stable slagging in the crystallizer, good casting blank quality, difficult felting and bleed-out, and the like.

The invention discloses a preparation method of a graded porous graphene material for a super-capacitor, belonging to the technical field of preparation of carbon materials. The graded porous graphene material for the super-capacitor is prepared by taking coal asphalt as a carbon source, taking nano zinc oxide or nano iron sesquioxide formed by a transitional metal as a template, taking potassium hydroxide as an activator, transferring a grinded mixture of the three into a porcelain boat, placing the porcelain boat in a tubular furnace for heating under a negative-pressure condition through a one-step process. A specific surface area of the graded porous graphene material is between 664m<2>/g and 1862 m<2>/g, total pore volume is between 0.51 cm<3>/g and 1.60 cm<3>/g, average pore size is between 2.53 nm and 5.91 nm, and yield of the graded porous graphene is between 16.9% and 62.8%. According to the preparation method disclosed by the invention, the cheap coal asphalt is taken as the material, preparation process is greatly simplified and operation safety is increased. The preparation method disclosed by the invention has the advantages of being simple in process, low in cost, suitable for industrial production, and the like.

An illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an europium(III)-activated rare earth metal sesquioxide of general formula (Y_Y-x-XE_x)_2-z(EU_1-a-3A_a)_z, wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of bismuth, antimony, dysprosium, samarium, thulium, and erbium, 0≦x<1, 0.001≦z≦0.2; and 0≦a<1 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The invention is also concerned with an amber to red-emitting a monolithic ceramic luminescence converter comprising an europium(III)-activated rare earth metal sesquioxide of general formula (Y_1-x-RE_x)_2-zO₃:(Eu_1-aA_a)_Z, wherein RE is selected from the group of gadolinium, scandium, and lutetium, A is selected from the group of dysprosium, samarium, thulium, and erbium, 0≦x<1, 0.001≦z≦; and 0≦a<1.

The invention relates to an oredressing method for pertinently reducing content of sesquioxide of iron and aluminum (R2O3) in the collophanite floatation process in advance. The process comprises the following steps of: (1) levigating raw collophanite until grains with the grain size of 0.038mm are more than or equal to 76 weight percent, and controlling the pulp mixing concentration to be 25-40 weight percent; (2) introducing ore pulp into a mineralizing agitation tank of a floatation machine, adding an agent for floating conventional mid-low grade collophanite for pneumatic flotation, ensuring that a spindle speed of the floatation machine is 1,800-2,100r/min, the floating aeration quantity is 0.05-0.10m<3>/h and the floating scraper speed is 20-30r/min, and obtaining phosphate concentrate subjected to rough concentration; and (3) controlling the pH of the phosphate concentrate subjected to rough concentration to be 4.5-5.5, adding a collector for removing R2O3, performing pneumatic flotation for 4 to 8 minutes, removing an impurity of R2O3 from foam, and obtaining base flow, namely a high grade phosphate concentrate product. By the method, the R2O3 content in the concentrate can be obviously reduced, the quality of the phosphate concentrate is improved, and production processes, flows and cost during purification in the subsequent acid making process can be reduced.

The invention relates to an environment-friendly and efficient method for preparing an iron sesquioxide/graphene composite material. In the method, cheap and abundant soluble ferrous salt serves as an iron source and reducing agent, graphene oxide is quickly reduced into the graphene by the characteristics of microwave heating, and ferrous is oxidized and converted into iron sesquioxide so as to obtain a sesquioxide/graphene composite material. The environment-friendly and efficient method fully utilizes the characteristics of ferrite, has the advantages of simple and efficient preparation technology, no industrial three-waste pollution and stable product performance and is favorable for producing on a large scale, and a product has a wide application prospect in the cathode material of a lithium-ion secondary battery.

The invention relates to a preparing technique and a growth device of a large-size sapphire crystal, and the preparing technique of the large-size sapphire crystal comprises the following steps: (1) aluminum sesquioxide with high purity that is weighted is filled into a molybdenum crucible pot, a stove is vacuumized until the atmospheric pressure inside the stove is less than 10<-3> Pa, and then protective gases are filled into the stove, and the stove pressure achieves minus 90 to plus 20 KPa; (2) raw materials are heated until complete melting is achieved, and heat is preserved for 3 to 5 hours; (3) seed crystals are lowered by 15 to 120mm under heat preservation, and then the molybdenum crucible pot is lowered by the height of the molybdenum crucible pot; (4) the temperature in the stove is decreased until 1600 to 1750 DEG C; (5) the molybdenum crucible pot is re-raised to a heating region, and heat is preserved for 100 to 150 hours and then the temperature is decreased slowly until room temperature. The preparing technique of the large-size sapphire crystal of the invention is characterized by simple device structure, low production cost, good preparing technique stability, reliable process, easier bubble elimination and high yield, and can cultivate the single sapphire crystal with large size, small dislocation density and high quality.

The invention discloses a promoter for generation of gas hydrates, and a preparation method and application thereof. The promoter for generation of gas hydrates is a dry powdery solution formed after high speed shearing and dispersion of a surfactant solution and strong hydrophobic solid particles in a high intensity stirrer, wherein the surfactant solution is an aqueous solution of one or more anionic surfactants, cationic surfactants or nonionic surfactants, and the strong hydrophobic solid particles are one or more selected from the hydrophobically modified particles consisting of silica, titanium dioxide, titanium sesquioxide, alumina, zinc oxide, calcium carbonate, montmorillonite, diatomite, fly ash, zeolite, talcum and mica particles, etc. The promoter provided by the invention is highly dispersed solution microdroplets and has a great gas-liquid contact area, the dispersed microdroplets contain surfactants, which enables gas-liquid contact during growth process of hydrates to be further reinforced, and therefore, a generation rate of gas hydrates and gas storage amount in a static system are substantially improved; meanwhile, the promoter has the advantages of low cost, no pollution and convenient preparation and usage.

The invention relates to the field of infrared radiating ceramics materials, in particular to an infrared energy-saving coating of a high-temperature kiln and a preparation method of the infrared energy-saving coating. The infrared energy-saving coating comprises the following raw materials in parts by mass: 10 to 30 parts of infrared radiating filler, 30 to 40 parts of filling material, 20 to 30 parts of silica sol, 8 to 20 parts of assistant and 10 to 15 parts of water, wherein the infrared radiating filler comprises the following raw materials in parts by mass: 10 to 20 parts of iron sesquioxide, 5 to 10 parts of cobalt oxide, 0 to 30 parts of nickel oxide, 20 to 50 parts of manganese dioxide, and 5 to 10 parts of nanoscale lanthanum oxide. The preparation method comprises the steps of mixing raw materials, diffusing, grinding, homogenizing to reach the average grain size of 350 to 500 meshes, filtering, encapsulating to obtain the product. According to the infrared radiating coating prepared by the method provided by the invention, a multi-phase composite ceramics layer is sintered at a lining of an inorganic kiln during heating; and the infrared radiating coating can be used for a long time at higher temperature, the energy consumption can be saved, and the service life of a kiln can be prolonged.

The invention relates to a preparation method for manganese oxide nano rods, belonging to the field of nano function materials. According to the preparation method, rod-shaped alkaline manganese oxide can be prepared by using hypermanganate and ethylene glycol under a hydrothermal condition, wherein the longest length of the alkaline manganese oxide can be up to six microns and the diameter size is 10nm-130nm; alkaline manganese oxide precursors are calcined under different calcining conditions to obtain the manganese oxide nano rods with different valence states and different sizes, namely manganese dioxide nano rods, manganese sesquioxide nano rods and trimanganese tetraoxide nano rods. By adopting the preparation method, the problems of an existing solvothermal method that the reaction time is long and the reaction temperature is high when the alkaline manganese oxide nano rods are synthesized and the diameters of the products are great and the products are not uniformly distributed are solved; and the preparation method has the advantages of simplicity in operation and many product varieties.

The invention relates to a phosphorite low-temperature foam flotation collector and a preparation method thereof. The collector consists of the following substances in part by weight: 0.7 to 0.9 part of cottonseed acidic oil, 0.1 to 0.3 part of fatty acid methyl ester, 0.01 to 0.05 part of sodium dodecyl benzene sulfonate, and 0.01 to 0.05 part of foaming agent. The preparation method comprises the following steps: mixing the 0.7 to 0.9 part of cottonseed acidic oil and the 0.1 to 0.3 part of fatty acid methyl ester; heating the mixture to the temperature of between 100 and 120 DEG C; adding alkali liquor into the mixture, stirring the mixture for saponification; controlling pH to be between 8 and 10; and adding the 0.01 to 0.05 part of sodium dodecyl benzene sulfonate and the 0.01 to 0.05 part of foaming agent into the mixture by using the saponified semi-finished product as a reference part to prepare the phosphorite low-temperature foam flotation collector. When the collector can be used in 'Haizhou type' phosphorite low-temperature direct flotation, the produced product still can achieve low sesquioxide concentrate and has higher recovery rate. Compared with the conventional 'Haizhou type' phsophorite low-temperature direct flotation collector, the collector has the characteristics of high collection capability, high selectivity, small using amount, low-temperature resistance, low mineral separation cost and the like.

The invention relates to a far infrared magnetic fiber and the application and a manufacturing method thereof; base material of the magnetic fiber contains superfine micro powder which is mixed by multiple elements and has the weight percentage of 2-8%; the superfine micro powder is prepared by the materials based on the weight percent: 20-50% of ferroferric oxide, 5-15% of gamma-aluminium sesquioxide, 15-30% of silicon dioxide and 25-40% of rutile titanium dioxide; the mean particle size of the superfine micro powder mixed by multiple elements is less than or equal to 0.5 micron. Compared with the prior art, the far infrared magnetic fiber has remarkable health care effect, stable magnetism, good far infrared effect and excellent dispersion effect of superfine micro powder granules; at the same time, the manufacturing method of the far infrared magnetic fiber has the advantages of simple technique and stable performance of the products.

The invention relates to the field of energy source and environment and particularly discloses a terahertz radiating material and a preparation method and application thereof. The terahertz radiating material is prepared from various raw materials which comprise the following components in parts by weight: 30-85 parts of silicon dioxide powder, 5-30 parts of aluminum oxide aluminum powder, 1-20 parts of iron sesquioxide powder, 1-15 parts of zirconium compound powder, 1-10 parts of potassium oxide powder and 0.01-0.1 part of a rare earth oxide. The preparation method comprises the specific steps of: mixing the various raw materials; and sintering the raw materials at 500-1800 DEG C. The radiating material has high terahertz radiating property, can emit terahertz waves to induce molecular resonance of oil molecules or water molecules, reduce the activating energy and promote reaction. The terahertz radiating material is applied to fuel oil to improve the combustion efficiency, and is applied to tape water to purity the water.

The invention relates to a method for simultaneously removing magnesium oxide, ferric oxide and aluminum oxide sesquioxide in middle-grade and low-grade phosphate ores by adopting a double-reverse floatation process. The method adopts the double-reverse floatation process to remove MgO, Fe2O3 and Al2O3 so as to realize continuous production of an industrialization device. The method comprises the following process steps of: levigating raw phosphate ore, wherein more than or equal to 85 percent of raw phosphate ore is minus 200 messes in size, and the solid content of ore pulp is 20-45 percent; adding a No.1 mixed inhibitor in the ore pulp, introducing the regulated ore pulp into a floatation machine, adding a collecting agent CB-1, aerating, and collating, so as to obtain magnesium removal phosphate concentrate; adding a No.2 mixed inhibitor in the magnesium-removal phosphate concentrate, adding a collecting agent CB-2, aerating, and collating, so as to obtain crude phosphate concentrate without ferric oxide and aluminum oxide; and adding a collecting agent CB-3 into the crude phosphate concentrate without ferric oxide and aluminum oxide, aerating, and collating, so as to obtain high-grade phosphate concentrate. The method can simultaneously remove the content of magnesium oxide, ferric oxide and aluminum oxide from the concentrate, thus obviously improving the quality of the phosphate concentrate and lowering the production cost in follow-up acid making process.

The invention discloses an exothermic insulating riser sleeve and a preparation method thereof and aims to solve the problems of bad heat insulation, insufficient heating and single effect in a conventional exothermic insulating riser sleeve. According to the formula, the exothermic insulating riser sleeve is prepared from quartz sand, vermiculite, potassium nitrate, calcium chloride, iron sesquioxide powder, graphite powder, aluminum powder, magnesium powder and modified sodium silicate. The method comprises the following steps: (1) weighing raw materials; (2) preparing a mixed wet material; and (3) filling the mixed wet material into a mold, pre-tightening while filling the wet material, performing compression molding, and demolding, thus finishing the operations. According to the formula of the exothermic insulating riser sleeve, the content of an exothermic agent is increased, the exothermic agent has the advantages of rapid heating, and a heating effect is improved. Moreover, the vermiculite serves as a thermal insulation material, is long in thermal insulation time and has a good thermal insulation effect, so that the molten iron feeding ratio in a riser is improved under the combined action of rapid heating and long thermal insulation.

This invention discloses a method for producing aluminium oxide by using aluminium-containg are with low aluminium/silicon ratio. The method comprises procedures of: (1), atomizing raw material ore; (2), dressing by magnetic separation; (3), acid treatment; (4), filtering and separation; (5), heating for dehydration decomposition; (6), recovering sulfur trioxide. After that, produced is the inventive product aluminium sesquioxide with high pureness upto 99.5%, meeting the standard of Non-Ferrous Metals Industries SY/T274-1998. The advantages of this invention are; full reutilization of materials, simple process, simple equipment, no discharge of wastes of solid, liquid and gas, no secondary pollution.

The invention discloses a formulation of an AC zinc oxide resistance chip. The formulation is characterized by comprising the following additives and a main material ZnO by weight percentage: 4.0 to 4.9 percent of Bi2O3, 3.0 to 4.0 percent of Sb2O3, 0.5 to 1.0 percent of SiO2, 2.0 to 3.0 percent of Co2O3, 0.50 to 0.80 percent of Cr2O3, 0.50 to 0.80 percent of MnCO3, 0.70 to 0.90 percent of NiO, 0.03 to 0.05 percent of aluminum nitrate, 0.10 to 0.20 percent of glass dust, 0.07 to 0.10 percent of B2O3 and 85.0 to 88.0 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the internal structure of the resistance chip is more excellent; and 2, dosage of cobalt sesquioxide, dibismuth trioxide and diantimony trioxide are added in the formulation, the mixture ratio of each composition is more reasonable, and the non-linearity coefficient of the resistance chip can be improved, the pressure ratio is reduced, the circulation capability is improved, and the comprehensive performance is excellent.

Disclosed is a preparation method of porous lithium iron phosphate powder. The preparation method includes dissolving trivalent iron salt into water and preparing solution; adding alkali liquor in the boiling state to obtain Fe(OH)3 nano particles, dispersing the Fe(OH)3 nano particles in the water after washing, forming iron sesquioxide colloid with stirring intensively; adding a water-soluble lithium source, a phosphorus source, a carbon source and doped ion compound into the iron sesquioxide colloid, intensively stirring to form colloid-shaped mixed pulp uniformly molecularly mixed; drying the pulp by mist and obtaining spherical lithium iron phosphate precursor with average grain diameter ranging from D50=2-3 micrometers; sintering the precursor in the inertia atmosphere at the temperature of 300-500 DEG C for 2-10 hours, and sintering the precursor again at the temperature of 500-800 DEG C for 2-12 hours and obtaining carbon-coated spherical porous lithium iron phosphate powder with average grain diameter of D50=2-3 micrometers.

The invention relates to a silica-calcia low-grade collophanite positive and inverse floatation process, which comprises the steps: 1 silica-calcia low-grade collophanite ores are broken up and grinded to enable phosphate minerals and gangue mineral monomers to dissociate, then are added with water to mix size, enter positive and inverse floatation, get rid of impurities in ores, and improve grade of phosphorite. Compared with the prior art, the silica-calcia low-grade collophanite positive and inverse floatation process has the advantages that the content of only one kind of gangue minerals can be reduced by adopting direct floatation and single inverse floatation, can reduce the contents of silicate minerals, carbonate minerals and iron and aluminum silicate minerals, can obtain low magnesium low power half oxide low silicon phosphate concentrate by adopting the silica-calcia low-grade collophanite positive and inverse floatation process, successfully achieves mineral processing enrichment of collophane calcium collophanite, and can improve use rate of phosphorus resource. The silica-calcia low-grade collophanite positive and inverse floatation process overcomes the defects that an existing floatation process can not be applied for mineral processing of silica-calcia collophanite which is high in content of high power half oxides.