33results about How to "Effective content control" patented technology

The invention discloses a preparation method of low-dysprosium corrosion-resistant sintering neodymium iron boron. According to the preparation method, Dy, Co, Al and alloy elements such as Cu, Ga and Nb are sputtered on the surface of airflow grinding powder by utilizing a magnetron sputtering-based powder coating process on the basis of preparing Nd(Pr)-Fe-B alloy powder, crystal boundary modified elements such as Co, Al, Cu, Ga and Nb are introduced while the Dy element is introduced into crystal boundary, and the temperature of the subsequent heat treatment process is reduced, so that the alloyed elements are dispersed properly near the crystal boundary in a sintering process, coercivity is improved, the Dy content is reduced, the corrosion resistance of a magnet is effectively improved, and preparation of the low-dysprosium corrosion-resistant sintering neodymium iron boron is realized.

The invention provides erbium strengthened magnesium-lithium alloy and a preparation method thereof. The magnesium-lithium alloy prepared through the following method comprises, by mass, 5%-11% of Li, 0.5%-10% of Er, not more than 5% of Al and the balance magnesium and inevitable impurity elements. The preparation method comprises the steps that (1) smelting is conducted under the condition of vacuum or protective atmosphere after component proportioning is designed according to the alloy elements, and then an alloy ingot is poured; (2) homogenization treatment is conducted at the temperature of 200 DEG C-500 DEG C, and the homogenization treatment time is 0.5-10 h; (3) multi-pass rolling is conducted at the temperature of 250 DEG C-400 DEG C, and the total reduction rate is 20%-90%; and (4) two times of aging treatment can also be conducted before and after rolling. According to the erbium strengthened magnesium-lithium alloy and the preparation method thereof, the alloy components, the two times of aging treatment temperature, the treatment time, the cooling process, the hot rolling temperature, the hot rolling passes and the deformation parameters are controlled, so that the grain size of the erbium strengthened magnesium-lithium alloy is refined, and the mechanical property is improved.

The invention discloses a preparation method of a catalyst for synthesizing piperazine through a monoethanolamine catalytic amination one-step method. The catalyst is spherical particles prepared by taking a mixture containing gamma-Al2O3 and theta-Al2O3 as a matrix, wherein the specific surface area of the catalyst is 200-300 m<2>/g; the pore volume is 0.45-0.65 cm<3>/g; the particle size is 1.0-3.0 mm. The catalyst mainly comprises the following components: 0-15% of Ni, 0-10% of Co, 0-5% of Mo, 0-10% of Fe, and 0-5% of La. The preparation method of the catalyst comprises the following steps: dipping a carrier for 4.0-12.0 h, then performing dehydration, spraying and performing dehydration, drying, baking, and activating the substance to prepare the spherical particle-like catalyst. The preparation method has the advantages that the solid catalyst for synthesizing piperazine through the monoethanolamine catalytic amination one-step method is prepared; the preparation method of the catalyst adopts a dipping and spraying combined technology, so that the method is simple and convenient to operate; the catalytic medium is free from addition of noble metal, so that the preparation cost of the catalyst is obviously reduced. When the catalyst is used for synthesizing piperazine through the monoethanolamine catalytic amination one-step method, the preparation method has the characteristics of high reaction selectivity and high reaction yield.

The invention discloses a method for detecting trace genotoxic impurities in voriconazole. The method comprises the following steps of carrying out derivatization treatment on a to-be-detected by using biphenyl-4-thiophenol and detecting a genotoxic impurity by adoption of a high performance liquid chromatography, wherein the to-be-detected sample is a raw medicine of voriconazole and the genotoxic impurity is (R/S)-4-(1-Bromoethyl)-5-fluorin-6-chlorine-pyrimidine. The method is not capable of realizing the effective separation of voriconazole and related genotoxic impurities , but also capable of realizing the quantitative detection of trace contents, so as to effectively control the contents of the genotoxic impurities in the raw medicines and ensure the medication safety. By adoption ofcommon agents, the method is convenient to operate, good in separation degree and high in sensitivity. The method is capable of realizing detection through common high performance liquid chromatography without purchasing and combining other instruments, so that the operation is convenient and the detection cost is low.

The invention discloses wear-resistant steel and a production method thereof, and relates to the technical field of steel production, and the wear-resistant steel comprises the following chemical components in percentage by mass: 0.10 to 0.45 percent of C, 0.20 to 0.55 percent of Si, 0.50 to 1.50 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, less than or equal to 0.060 percent of Nb, less than or equal to 0.030 percent of V, 0.008 to 0.025 percent of Ti, 0.20 to 1.00 percent of Cr, less than or equal to 1.80 percent of Ni, less than or equal to 0.50 percent of Mo, 0.025 to 0.055 percent of Al, 0.0010 to 0.0030 percent of B, 0.0010 to 0.0018 percent of Mg, less than or equal to 0.0045 percent of N and the balance of Fe and inevitable impurities. On the premise that the high-strength martensite structure of the wear-resistant steel plate is guaranteed, through quantitative treatment of microalloying elements, the number and the size of carbonitride are reduced, the cooling speed and the austenite temperature of a casting blank are regulated and controlled, a secondary quenching optimization process is adopted, structure grains are refined, structure stress is eliminated, and the wear resistance of the wear-resistant steel plate is improved. The problem of delayed cracks of wear-resistant steel in the cutting and grinding process of casting blanks and steel plates is solved.

The invention provides a preparation method for a 1420 aluminum lithium alloy hollow ingot blank molded through injection. The preparation method comprises the following steps that the raw materials of aluminum metal, lithium metal, magnesium metal and zirconium metal are smelted in a primary smelting furnace to form a liquid metal mixed solution; primary deslagging and degassing is carried out; the liquid metal mixed solution is subjected to heat preservation in a tundish, and secondary deslagging and degassing is carried out; in the tundish, the liquid metal mixed solution is atomized in aninert atmosphere to form a particle jet flow, technical parameters of injection equipment are adjusted, the particle jet flow is controlled to be deposited on a substrate at a high speed, and a 1420 aluminum lithium alloy hollow blank material is molded through solidification; the 1420 aluminum lithium alloy hollow blank material molded through injection is naturally cooled, and residual stress iseliminated; and a finished product is obtained through turning and demolding. According to the preparation method, after the aluminum lithium alloy hollow ingot blank is prepared and a correspondinghot working process and a corresponding heat treatment process are carried out, the tensile strength exceeds 490 MPa, the yield strength exceeds 340 MPa, and the elongation percentage is greater than10%.

The invention discloses a comprehensive treatment process of lithium slag, which is used for comprehensively utilizing waste slag generated after lithium is extracted by a lithium ore sulfuric acid method process by adopting an ore grinding treatment technology, a weak-strong magnetic separation iron removal technology, a solid-liquid two-phase desulfurization technology and a multi-stage circulating water classification circulation technology. According to the method, iron-containing and sulfur-containing impurity components and silicon-aluminum components can be effectively separated, and conditions are created for producing high-added-value products such as silicon-aluminum micro powder and tantalum-niobium concentrate by comprehensively utilizing the lithium slag. And meanwhile, the problems of coarse product granularity, low yield, valuable metal waste, wastewater discharge and the like in the existing production process are solved, and the method has a relatively good popularization and application prospect.

The invention relates to a treatment agent of removing harmful metal elements from the surface of a catalyst, wherein the treatment agent includes following components, by mass, 0.1-10% of disodium ethylene diamine tetraacetate, 0.1-15% of sulphamic acid or/and sulfosalicylic acid, 0.005-0.1% of aspartic acid or/and polyepoxysuccinic acid, 0.01-0.5% of a surfactant and the balanced being water. The invention also relates to a method of removing the harmful metal elements from the surface of the catalyst with the treatment agent. The method is simple and available. The catalyst can be soaked completely in the treatment agent, so that the harmful metal elements in the catalyst are directly subjected to a chemical reaction with the treatment agent in liquid phase, wherein generated substances are dissolved in the treatment agent, so that the harmful metal elements can be high-effectively removed under the situation of not changing the content and distribution of the active elements on the surface of the catalyst, thereby effectively controlling the content of the harmful metal elements on the surface of the catalyst for maintaining the activity and the catalytic reforming performance of the catalyst.

The invention discloses a multifunctional computer room, which comprises a roof, a mounting shell, a ceiling, a supporting wall body, a floor, a wiring cavity, a solar panel, a support rod, a ventilation hole, a ventilation pipe, a mounting hole, a first ventilation box body, a ground wire row, a second ventilation box body and a first induced draft fan, a camera, a rain shield frame, a storage battery, an electro-hydraulic push rod, an air conditioner installation frame, a sliding groove, sliding blocks, a wall body base layer, an insulating layer, a noise reduction layer, a mounting strip, athrough hole, a fan blade, a fixing frame, a filtering layer, a second induced draft fan and a supporting plate, the output end of the electro-hydraulic push rod is welded and fixed to the two sidesof the top of the air conditioner installation frame, the two sides of the air conditioner installation frame are provided with the sliding blocks, the sliding blocks are in sliding connection with the sliding groove, the sliding groove is arranged in the inner wall of the two sides of the installation shell, the computer room is environment-friendly and energy-saving, and the heat-insulating andnoise-reducing effects are good, moreover, the installation, disassembly and maintenance of the air conditioner are facilitated, the abrasion sound of the floor is reduced, the service life is prolonged, and the anti-static effect is remarkable.

The invention provides a quality control method of amygdalin in children lung heat cough and asthma granules. A thin-layer chromatography identification method has the advantages of small sample application amount, good separation effect, clear spots, moderate specific shift value and good reproducibility. Quantitative analysis is carried out on the amygdalin component in the infantile lung-heat cough and asthma granules through content determination, it is verified that the content of the amygdalin in the infantile lung-heat cough and asthma granules can be accurately and efficiently detected through content determination chromatographic conditions, and through combination of a thin-layer chromatography identification method and content, the content of amygdalin in the children lung heat cough and asthma granules can be effectively controlled, and the medication safety of the children lung heat cough and asthma granules is ensured.

The invention discloses an oxidation-resisting wear-resisting alloy steel for a temperature sensor. The oxidation-resisting wear-resisting alloy steel for the temperature sensor comprises, by weight, 0.1%-0.2% of C; not larger than 0.55% of Si, 1.0%-1.6% of Mn, 18.2%-24.2% of Cr, not larger than 0.04% of P, not larger than 0.04% of S, 0.02%-0.15% of V, 0.015%-0.06% of Nb, 0.01%-0.03% of Al, 0.01%-0.03% of Ti, 0.2%-0.4% of Mo, 0.1%-0.3% of Bi, 0.2%-0.6% of Y, 14%-15% of Ni, 0.02%-0.08% of rare earth and the balance Fe and inevitable impurities. The invention further discloses a preparation method of the oxidation-resisting wear-resisting alloy steel for the temperature sensor. According to the oxidation-resisting wear-resisting alloy steel for the temperature sensor and the preparation method of the oxidation-resisting wear-resisting alloy steel for the temperature sensor, through reasonable selection of components, the prepared alloy steel for the temperature sensor has excellent oxidation resistance and wear resistance.

The invention belongs to the technical field of medicinal chemistry, and particularly relates to a canagliflozin impurity and a preparation and removal method thereof, the canagliflozin impurity disclosed by the invention is generated in a canagliflozin production process, and the disclosed impurity can provide a qualified impurity reference substance for quality control of a canagliflozin intermediate. According to the impurity removal method, the purity of the canagliflozin intermediate can be effectively improved, the purity of the intermediate can reach 99.91%, then the purity of the canagliflozin product is improved, a canagliflozin impurity reference substance can provide an important reference basis for monitoring of the impurity in research and development of a canagliflozin process, and the canagliflozin quality monitoring level is improved.

The invention discloses a mixing and blending device for water-borne wood paint production and an implementation method thereof. The mixing and blending device comprises a blending assembly, a mixing assembly and an electric control valve, materials stirred and blended through blending blades in a stirring material pipe are fed into a mixing shell in the mixing assembly through a material pushing head driven by a material pushing rod. a wood paint semi-finished product flows into a mixing screening groove through a through hole after being guided by a guide plate in the mixing shell, the ingredients and the wood paint semi-finished product with different contents are stirred and mixed uniformly by the stirring blades in the mixing screening groove, and a vibration pump drives the mixing screening groove to vibrate through tvibration springs, so that the mixture is screened out from wood paint screening holes in the bottom of the mixing screening groove. And after being permeated by permeation holes in a permeation plate, the mixture is stored at the bottom of the mixing shell, an operator can open theelectric control valve and collect the blended product through a discharge port, the content of various added components can be effectively controlled, and meanwhile, generated precipitates can be effectively removed in the blending process so as to ensure the quality of the product.