18results about How to "Control content" patented technology

The invention discloses 1000MPa-grade hydroelectric steel with optimized low-temperature toughness and a preparation method of the 1000MPa-grade hydroelectric steel, and belongs to the technical field of steel production. The 1000MPa-grade hydroelectric steel with the optimized low-temperature toughness is prepared from the following chemical components in percentage by weight: 0.03 to 0.09 percent of C, 0.80 to 1.40 percent of Mn, 0.10 to 0.15 percent of Si, 0.05 to 0.14 percent of Cu, less than or equal to 0.003 percent of S, less than or equal to 0.01 percent of P, 0.01 to 0.04 percent of Al, 0.03 to 0.10 percent of V, 0.03 to 0.06 percent of Cr, 0.3 to 0.65 percent of Mo, 0.001 to 0.002 percent of B, 0.01 to 0.018 percent of Ti, 0.015 to 0.025 percent of Nb, 0.18 to 0.60 percent of Ni and the balance of Fe and other inevitable impurities. The preparation method comprises a steel-making process, a heating process, a rough phosphorus removal process, a rolling process and a heat treatment process. By optimizing the chemical components and the preparation process of the 1000MPa-grade hydroelectric steel, the low-temperature toughness of the 1000MPa-grade hydroelectric steel is remarkably improved on the basis that the 1000MPa-grade hydroelectric steel with high strength is obtained, and the 1000MPa-grade hydroelectric steel is suitable for industrial application.

The application relates to a dual-purpose maintenance system for taking out a heart and maintaining the heart extracorporeally, which comprises a perfusion pipeline assembly and an organ box. The design that the organ box is communicated with a blood storage container and is switched can support the no-stop-taking-out and transportation operation of the heart. In the conversion process, the pipeline does not need to be replaced, the heat ischemic injury and ischemia-reperfusion injury of the heart are reduced.

The invention provides a carbon fiber reinforced polyether-ether-ketone self-lubricating composite material and a preparation method and application thereof.The preparation method comprises the steps that carbon fiber serves as an anode, voltage is applied to an electrolyte solution, electrochemical oxidation treatment is conducted, hydroxylated carbon fiber is obtained, the hydroxylated carbon fiber and 2-amino-5-nitrobenzothiazole are mixed, and the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is obtained. Adding an anhydrous modified reaction solvent, and reacting at 25-40 DEG C for 4-10 hours to obtain modified carbon fibers; and melting and granulating the self-lubricating composite material: mixing the modified carbon fiber, polyether-ether-ketone, a lubricant and an auxiliary agent in a high-speed mixer for 10-20 minutes, extruding by using a double-screw extruder, cooling, and granulating to obtain the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material. The carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is applied to self-lubricating mechanical parts. According to the self-lubricating composite material, the self-lubricating performance is improved, the interface bonding energy between the carbon fibers and the polyether-ether-ketone is enhanced, and the self-lubricating composite material has good mechanical performance.

This invention discloses a method for treating ammonia-containing tail gas, relating to the field of ammonia-containing tail gas treatment. The method involves the ammonia-containing tail gas entering from the bottom of an acid washing tower and passing sequentially from bottom to top through a bottom washing liquid zone, a first packing zone, a second packing zone, a spray zone, and a demister for treatment. The spray zone uses atomizing nozzles to spray out a mixed washing liquid, controlling the pH value and conductivity of the washing liquid. Each atomizing nozzle includes a nozzle body, a first chamber, multiple diversion holes, a second chamber, and an outlet hole formed on the nozzle body and connected sequentially. The opening width of the diversion holes is smaller than the opening width of the outlet holes, and the width of the outlet holes increases along the axial direction. The orthographic projections of the diversion holes and the outlet holes on the end face of the nozzle body near the outlet hole do not intersect. This method can achieve efficient removal of ammonia from the tail gas even when the pH value of the washing liquid is high, resulting in a low acid mist value in the tail gas. It eliminates the need for a secondary water washing tower for treatment, thus reducing costs.

This invention discloses a liquid-phase functional urethane antifouling coating, its preparation method, and its application. The preparation method includes the following steps: S1. Mixing monohydroxy-terminated polydimethylsiloxane and polypropylene glycol and removing water to obtain solution A; S2. Dissolving hexamethylene diisocyanate trimer in xylene to obtain solution B; slowly adding solution B dropwise to solution A while continuously stirring; S3. After the addition is complete, heating the reaction to 80-85°C and continuously stirring to ensure a complete reaction, finally obtaining prepolymer C; S4. Adding curing agent polyaspartic acid ester, leveling agent, and defoamer to solution C, and stirring to obtain solution D; S5. Applying solution D to the surface of a substrate and curing at room temperature for 2 hours to obtain a liquid-phase functional urethane antifouling coating. The antifouling coating of this invention can cure at room temperature, is environmentally friendly, inhibits the adhesion of fouling organisms, and has good anti-icing properties.

The invention discloses a production method of a cold-rolled steel strip for a welding wire. The production method comprises the working procedures of converter smelting, continuous casting, hot rolling, cold rolling, continuous annealing and flattening. Refining treatment is not carried out; continuous annealing is adopted in the annealing process, and a heating device is arranged behind the rapid cooling section. According to the cold-rolled steel strip produced through the method, the yield strength Rp0.2 is smaller than or equal to 190 MPa, the tensile strength Rm is 280-350 MPa, the percentage elongation after fracture A80 mm is larger than or equal to 44%, the cold-rolled steel strip has good formability, welding performance and drawing machining performance, the surface quality is good after drawing, surface defects such as orange peel and wrinkling do not exist, and meanwhile the production cost is low.

The invention belongs to the technical field of medical dressings, and particularly relates to a dressing for healing a wound of a human body. Comprising a positioning boot, a mounting shell is detachably mounted in the positioning boot, the mounting shell is provided with a first rod and a second rod, a fiber non-woven fabric is jointly and fixedly connected between the first rod and the second rod, a liquid absorption dressing layer is fixedly connected in the mounting shell, a biological battery module is arranged in the liquid absorption dressing layer, and the biological battery module is arranged in the liquid absorption dressing layer. A movable shell is arranged in the mounting shell, and is fixedly connected and communicated with liquid injection cylinders which are symmetrically distributed in an array manner. Cleaning liquid is injected into the liquid absorption dressing layer through the liquid injection cylinder, penetrating liquid in the liquid absorption dressing layer is brought out through the cleaning liquid, in this way, the cleanliness degree of the contact position of the liquid absorption dressing layer and the wound surface of a patient is guaranteed, and meanwhile the probability that normal use of the liquid absorption dressing layer is affected due to the fact that the penetrating liquid in the liquid absorption dressing layer is dried and hardened is reduced; therefore, the service life of the liquid absorption dressing layer is prolonged, and the replacement frequency of the liquid absorption dressing layer is reduced.

The invention provides a method for detecting impurities in vincristine sulfate through liquid chromatography-mass spectrometry, and belongs to the technical field of pharmaceutical analysis. According to the method, ammonium acetate is used as a mobile phase A, acetonitrile is used as a mobile phase B, diethylamine and phosphoric acid of a traditional eluent are abandoned, negative effects on material performance and chromatographic resolution are avoided, the effect of separating vincristine sulfate and various impurities is better, and the resolution is higher. Meanwhile, by combining ultraviolet detection and mass spectrum detection, vincristine sulfate and impurities A, C, D, E, F, G and H can be detected separately, and qualitative and quantitative analysis is performed on the impurities, so that the prepared impurities can be evaluated accurately, and the content of the impurities in the product can be controlled accurately.

The invention belongs to the technical field of phosphate production and quality control, and particularly relates to a method for detecting a neutralization reaction endpoint in production of trisodium phosphate and application of the method. (2) potentiometric titration: titrating the to-be-detected sample solution to a reaction end point A1 by using a hydrochloric acid standard solution, recording the volume V1 of the consumed standard solution, continuously titrating to a reaction end point A2 by using a sodium hydroxide standard solution, and recording the volume V2 of the consumed standard solution; (3) calculating the reaction endpoint ratio of trisodium phosphate; (4) if the value of k is greater than 2.5, indicating that unreacted NaOH exists in the to-be-detected sample solution; if the value of k is less than 1.5, Na2HPO4 exists in the sample solution to be detected; if k is larger than or equal to 1.5 and smaller than or equal to 2.5, the content of anhydrous trisodium phosphate is larger than or equal to 97%, and the total phosphorus content is larger than 42%; the detection method provided by the invention improves the scientificity and accuracy of neutralization reaction endpoint determination, does not need electrode calibration and temperature compensation, and improves the accuracy of endpoint determination.

The present invention relates to amorphous substances, crystals, pharmaceutical compositions, preparation methods and uses of a thiohydantoin compound or pharmaceutically acceptable salt thereof. Specifically, provided are an amorphous substance of a compound of formula I, 1,5-naphthalene disulfonate thereof, an amorphous substance and two crystals (having crystal form A and crystal form B, respectively) of the 1,5-naphthalene disulfonate thereof, and corresponding pharmaceutical compositions, as well as preparation methods for the products above and corresponding pharmaceutical uses.

This application relates to a clean steel and its preparation method. The clean steel composition includes: C: ≤0.0030%; N ≤0.0020%. Such a pure composition meets the requirements of steel used in high-end fields. The method obtains clean steel through electric furnace smelting of all scrap steel or high scrap ratio steel, ladle refining process, continuous casting, heating, and rolling. It effectively controls the nitrogen and oxygen content in the molten steel, ensuring the high purity of the steel. In particular, at the end of the decarburization treatment of the RH vacuum circulation degassing refining process, a certain amount of methane is mixed into the bottom blowing gas. The methane reacts with the oxygen in the molten steel to generate a large number of CO bubbles, which enhances the stirring of the molten steel, promotes the flotation of inclusions, and improves the cleanliness of the molten steel. At the same time, the CO bubble effect improves the denitrification efficiency of the molten steel. Furthermore, since the methane gas consumes some of the oxygen in the molten steel, the oxygen content of the molten steel is reduced at the end of the decarburization treatment, thereby reducing the amount of aluminum alloy used for deoxidation and further improving the cleanliness of the molten steel.

The application provides a method for manufacturing alloy steel welding wire by a plating method, and belongs to the field of metal material welding materials, and comprises the following steps: analyzing the welding wire to obtain the original content of elements in the welding wire and giving a designed value of the alloy content of the welding wire to determine the alloy content in the plating layer; determining the preliminary thickness of the alloy plating layer of the welding wire; plating the plating layer on the surface of the welding wire according to the preliminary thickness; analyzing and testing to obtain the alloy content of the plating layer, comparing the alloy content of the plating layer with the designed value of the alloy content of the welding wire to obtain the adjustment coefficient of the alloy plating layer; determining the adjusted thickness of the alloy plating layer; and re-plating the original welding wire according to the adjusted thickness of the alloy plating layer. The application changes the thickness of the plating layer to increase the content of certain alloy elements of the existing welding wire, and meets the welding requirements of special materials and structures. The plating method is flexible, the thickness is easy to control, and the method has the advantages of low investment, green environmental protection, convenient component adjustment, low cost and short production cycle.

The present disclosure discloses nitrosamine impurities, a varenicline pharmaceutical composition capable of reducing the generation of nitrosamine impurities, and the preparation and use thereof. By means of adding a pharmaceutically acceptable acid to a secondary amine compound or a composition thereof, the pharmaceutical composition of the present disclosure can effectively inhibit and reduce the generation of nitrosamine impurities, improve the stability of the secondary amine compound or the composition thereof, and control the content of genotoxic nitrosamine impurities to be at a relatively low level, so as to comply with safety requirements.

The ternary positive electrode material, the preparation method thereof and the electrochemical device are characterized in that the ternary positive electrode material provided by the embodiment of the invention comprises an inner core and a coating layer located on the surface of the inner core, the inner core is doped with an aluminum element, and the coating layer contains phosphate. The ternary positive electrode material has the characteristics of core aluminum element doping and surface phosphate coating, the aluminum element reduces the cation mixing degree of the ternary positive electrode material and stabilizes the layered structure of the ternary positive electrode material, the phosphate effectively improves the chemical stability and conductivity of the surface of the ternary positive electrode material, and the surface of the ternary positive electrode material is coated with the surface phosphate. The two synergistically improve the structural stability and cycle performance of the ternary positive electrode material.

The application belongs to the technical field of permanent magnetic materials, and particularly relates to a ferrite permanent magnetic material and a preparation method thereof. The ferrite permanent magnetic material comprises a base material and an additive material, and the base material comprises, by weight fraction, 80-90 parts of iron oxide, 5-10 parts of strontium oxide, 8-12 parts of nano-magnesium oxide and 2-3 parts of barium carbonate. The additive material comprises an additive and a dispersing aid. The additive comprises calcium carbonate, silicon dioxide and bismuth oxide. The ferrite permanent magnetic material obtained by optimizing the formula and the preparation method is free of cracks, has high density, and effectively improves the coercive force, intrinsic coercive force and remanence, and has excellent overall performance and good processing performance.

The application relates to the technical field of carbon dioxide hydrogenation catalysts, and discloses a modified indium oxide catalyst, a preparation method thereof and a method for preparing methanol through carbon dioxide hydrogenation, the catalyst comprising indium oxide and a modified element, wherein the modified element is zirconium; the indium oxide comprises cubic phase indium oxide and hexagonal phase indium oxide, and the mass ratio of the cubic phase indium oxide to the hexagonal phase indium oxide is 1:0.1-50; the modified element at least partially exists in the form of zirconium oxide, and the zirconium oxide has a monoclinic crystal type. The catalyst provided by the application has high reaction activity, can consider high carbon dioxide conversion rate and methanol selectivity in the reaction for preparing methanol through carbon dioxide hydrogenation, has good reaction stability, and has a low catalyst deactivation rate.

The invention provides a method for preparing diglyceride, which comprises the following steps: S1, carrying out first hydrolysis treatment on high-phosphorus-content plant crude oil by using phospholipase C to obtain a hydrolysis product; and S2, carrying out second hydrolysis treatment on the hydrolysis product by using lipase to obtain the diglyceride. According to the method, dephosphorization pretreatment is not needed, the diglyceride preparation process can be effectively simplified, the diglyceride yield is increased, meanwhile, the reaction process is precisely regulated and controlled to control the content of diglyceride in the product, the generation amount of free fatty acid is reduced, the product quality and the production efficiency are improved, and the method is suitable for industrial large-scale application.

The invention provides a manufacturing method of a high-scrap-ratio fingerprint-resistant galvanized steel sheet and the steel sheet, and relates to the technical field of ferrous metallurgy. By controlling the adding proportion and chemical components of the scrap steel and combining specific process parameters, adverse effects of residual elements are effectively inhibited, the hot brittleness risk is reduced, the surface quality and the mechanical property stability are improved, and the method has the advantages that the content of the residual elements is effectively controlled, the hot brittleness risk is reduced, and the surface quality and the mechanical property stability of a steel plate are improved; and meanwhile, low-carbon production under the high scrap steel ratio is achieved.