18results about How to "Stable and controllable process" patented technology

The invention discloses high-entropy rare earth ceramic powder as well as a rapid preparation method and application thereof. The rapid preparation method of the high-entropy rare earth ceramic powder comprises the following steps: 1) uniformly mixing rare earth oxide powder with one of HfO2 powder, ZrO2 powder, Ta2O5 powder and SiO2 powder to obtain mixed powder; and 2) carrying out laser radiation heating on the mixed powder to obtain the high-entropy rare earth ceramic powder. The high-entropy rare earth ceramic powder has the excellent characteristics of uniform element distribution, no impurity phase, large synthetic component space and the like, and the preparation method has the advantages of universality, simplicity, rapidness, high efficiency and the like, can realize the purpose of high-throughput material screening, is suitable for being used on hot end parts of aerospace engines, and has a very wide application prospect.

The invention relates to a preparation method of a paris polyphylla extract as well as a product and application of the paris polyphylla extract. The preparation method comprises the following steps: crushing paris polyphylla, mixing the crushed paris polyphylla with an ethanol water solution, and carrying out reflux extraction to obtain an extracting solution; concentrating the extracting solution to obtain an extract, dissolving the extract in an ethanol aqueous solution, loading the extract to macroporous adsorption resin, and eluting with the ethanol aqueous solution to obtain an eluent; concentrating the eluent to obtain an extract, dissolving the extract in an ethanol aqueous solution to obtain a decolorized stock solution, mixing the decolorized stock solution with aluminum oxide for decolorization, and filtering to obtain a supernatant to obtain a decolorized solution; and concentrating and drying the decolored solution to obtain the product. According to the method, natural pigments in the plant raw materials are removed while the saponin extraction rate is guaranteed, and the appearance quality of the product is improved.

The invention relates to the technical field of optical coating, in particular to a partitioned coating method for a spatial extreme ultraviolet band reflector, which aims to coat different or same films on more than two or more regions at certain intervals. The method comprises the following steps: firstly, designing more than two or more EUV wave band multilayer films, wherein the structures and the central wavelengths of the EUV multilayer films can be different; then designing an adjustable shielding coating tool which is in direct contact with the mirror surface of the reflecting mirror; the EUV wave band is plated on the surface of the cleaned reflecting mirror in a regional mode through an adjustable shielding film plating tool; and finally, testing the reflecting mirror after film coating. According to the invention, the boundary of the coating area is clear and has no shadow effect, and stray light crosstalk is reduced; and the film is good in film forming quality, small in film stress, excellent in optical performance, good in film firmness and high in space environment adaptability.

The preparation process of the eczema cream comprises the following steps: S1, raw material pretreatment: coarsely crushing calcined calamine; removing impurities from cortex phellodendri, coarsely crushing, and removing impurities from indigo naturalis for later use; mixing the three components, performing superfine grinding, and sieving with a 100-mesh sieve to obtain a medicinal powder raw material; s2, substrate preparation: melting and stirring beeswax and sesame oil at 85-90 DEG C, and cooling to obtain a transparent substrate; s3, mixing and forming: mixing the medicinal powder raw materials and the transparent matrix according to the mass ratio of (2.07-1): 2.13, uniformly stirring at 85-90 DEG C, cooling, solidifying, sterilizing and packaging to obtain the eczema cream. According to the standardized preparation process and the quality inspection method of the eczema cream, by optimizing superfine grinding parameters, a matrix ratio and a quality control system, stable production and quality controllability of the eczema cream are achieved, and technical support is provided for preparation conversion.

The application discloses a boride double-scale synergistically reinforced high-manganese steel-based wear-resistant casting and a preparation method thereof, and belongs to the technical field of wear-resistant metal materials and special casting. The casting takes high-manganese steel as a matrix, adopts micron-level TiB2 and nanometer-level ZrB2 to form double-scale boride reinforcing phases, controls the distribution of the reinforcing phases through a powder core wire mesh weaving technology, and forms a metallurgical bonding interface through spray deposition and isothermal annealing. The synergistic improvement of tensile strength, impact toughness and wear resistance is realized. The product is suitable for high-stress wear environments in the mining, metallurgy, building material and other industries, effectively solves the technical pain point that the strength and toughness of traditional high-manganese steel are difficult to be considered, the process is stable and controllable, and differential strengthening can be realized, and the product has industrial application value.

This invention belongs to the field of composite board technology, specifically relating to a method for preparing outdoor wood-plastic composite boards using household waste as raw material. The method for preparing outdoor wood-plastic composite boards using household waste as raw material is characterized by the following steps: S1, pretreatment: crushing, sorting, separating, grinding, and drying the household waste to obtain pretreated granules; S2, mixing the pretreated granules with a coupling agent and additives sequentially and evenly to obtain a mixture; S3, extruding, shaping, drawing, and cutting the mixture to obtain the outdoor wood-plastic composite board; wherein the coupling agent is polymethylene polyphenyl polyisocyanate, γ-aminopropyltriethoxysilane, and maleic anhydride. This invention uses household waste as raw material and employs a composite coupling agent system for chemical modification to eliminate the adverse effects of impurities such as aluminum foil and protein that are difficult to separate, thus improving product quality; the resulting outdoor eco-friendly wood-plastic composite board exhibits superior mechanical properties compared to products produced using traditional processes.

This application belongs to the technical field of catalyst preparation, and particularly relates to a highly efficient hydrophobic methanol catalyst and its preparation method. The method includes: preparing raw materials such as copper salt, zinc salt, and aluminum salt, setting a preset total molar ratio of copper, zinc, and aluminum, and separating the zinc salt and aluminum salt according to a deviation of ≤10% from the total molar ratio; preparing first and second salt solutions, an auxiliary agent solution, and an alkaline solution; first establishing a first liquid level in the reactor, and then adding the first salt solution and alkaline solution in parallel at a preset temperature and pH to construct the core phase, followed by the addition of the second salt solution, the auxiliary agent solution, and the alkaline solution to form a coating layer, and aging at a higher temperature; washing, drying, and calcining to prepare a catalyst precursor; preparing a hydrophobic component solution and an oxide precursor solution, mixing and hydrolyzing them to obtain a composite hydrophobic solution; and impregnating and drying the precursor with the solution to obtain the product. This application solves the problem of water-induced deactivation of traditional catalysts and improves CO2 efficiency. 2 Conversion rate and methanol selectivity, reduced deactivation rate, and process adaptability to industrial production.

This invention discloses a method for preparing high-purity carbazole alkylphosphonic acid derivatives, specifically a method for preparing high-purity MeO-2PACZ, 4PADCB, Me-4PACZ, and 2PACZ. This invention simplifies the post-reaction processing flow and employs a specific preparative chromatography combined with lyophilization for purification, achieving a product purity ≥99.0%. When used in the fabrication of perovskite solar cells, the products show a significant improvement in photoelectric conversion efficiency. Furthermore, the process is highly automated and easier to operate, directly adaptable to large-scale industrial production, meeting the high-purity application requirements of core functional materials for high-efficiency perovskite photovoltaic devices.

The invention provides a plant-derived active polypeptide and application thereof in prevention or treatment of Parkinson's syndrome, and belongs to the technical field of polypeptide bioengineering. The amino acid sequence of the active polypeptide is MKGASSIMYALG, and the active polypeptide is prepared from Fuding white tea raw materials through a directional two-step enzymolysis process. According to the polypeptide, the damage of 6-OHDA induced BZ555 nematode dopaminergic neurons can be remarkably reduced, and the dyskinesia of Parkinson's syndrome model animals can be remarkably improved; meanwhile, the expression level of proinflammatory factors such as IL-1beta and IL-18 in serum of a model mouse can be lowered, the content of dopamine in a nigra area of brain tissue of the model mouse can be increased, and the activity of monoamine oxidase B can be reduced. The results show that the Fuding white tea-derived active polypeptide has exact prevention and treatment effects on Parkinson's syndrome, and has important development value and wide application prospects in the field of medicines.

The present application belongs to copper pyrometallurgy technical field, specifically discloses a kind of dynamic optimization method of double-side blowing copper smelting slag type based on molten pool working condition real-time monitoring and model driving.The method includes: real-time acquisition molten pool temperature, flue gas oxygen content, slag Fe3O4 Content and viscosity and other multiple key working condition parameters;Parameter is input into the preset control model, the expert rule based on metallurgical thermodynamics and production data is embedded in the model, and the dynamic adjustment amount of SiO2, CaO, MgO three kinds of slag forming agent is calculated accordingly;According to the adjustment amount, the proportion of slag forming agent is adjusted in real time;Periodic acquisition of slag sample analysis, compare measured value with model expected value, and feedback correction model parameters, realize closed-loop optimization.The present application can dynamically adjust slag type according to molten pool real-time working condition, reduce the fluctuation of slag fluidity by more than 40%, stabilize the copper content of slag below 1.5%, and improve the direct recovery rate of copper to more than 97.5%, significantly improve the process stability and metal recovery rate.

The application discloses a preparation method of single-crystal dimanganese trioxide, a lithium manganate positive electrode material and a lithium battery, and belongs to the technical field of lithium batteries. 2+ Excessive oxidation is inhibited by controlling the content of reducing substances through the addition of a reducing additive 3+ , combined with the control of solid content, the adjustment of multi-stage pH value and the aging process, to obtain single-crystal dimanganese trioxide with high purity and regular hexahedron morphology. The lithium manganate positive electrode material is prepared by calcining the single-crystal dimanganese trioxide and lithium carbonate according to a Li / Mn molar ratio of 0.55:1. The application has the advantages of mild process, cheap raw materials, easy industrialization, adaptation to the demand of high-performance lithium batteries, and solution to the problems of low purity, irregular morphology, high energy consumption and insufficient electrochemical performance in the traditional method.

The invention discloses a method for refining 316L stainless steel grains based on a selective laser melting technology, and belongs to the technical field of metal material additive manufacturing. According to the method, Fe-C-B alloy powder is added, a Fe-B or Fe-B-Cr type compound is formed to serve as a heterogeneous nucleation core when the 316L stainless steel component is manufactured through selective laser melting, columnar crystal epitaxial growth is inhibited, and grain refinement is achieved. By means of the synergistic effect formed by Fe, C and B, the negative influence of the SLM technology on the 316L stainless steel forming process is avoided, the advantages of the SLM technology are fully exerted in the 316L stainless steel component forming process, accordingly, the 316L stainless steel component high in compactness and excellent in comprehensive performance can be formed only through SLM, the method is stable in process, low in crack sensitivity and high in yield, and the production cost is reduced. The method has remarkable advantages in the field of additive manufacturing of high-performance 316L stainless steel components.

The invention relates to an ultrathin broadening polyimide fabric and a preparation method thereof. The fabric is formed by weaving warp-wise and weft-wise broadening polyimide fibers or weaving the warp-wise and weft-wise broadening polyimide fibers with broadening fibers such as aramid fibers and carbon fibers in a mixed mode, the surface density is 20-200 g / m, the thickness is 20-200 microns, the length-width ratio of the section of the broadening polyimide fibers is 10: 1-100: 1, and the width is 0.5-10 mm. The preparation method comprises the steps of polyimide precursor hot roller broadening, fiber pre-shaping, weaving forming, after-finishing and the like, and the fabric is ultrathin, high in strength, good in resin wettability and high-temperature stability by accurately controlling the broadening temperature, tension, weaving parameters and a surface treatment process. The technical blank of the polyimide broadening fabric is filled, and the polyimide broadening fabric can be widely applied to the fields of aerospace, high-temperature protection, new energy automobiles and the like and has important industrial application value.

The invention belongs to the technical field of biological product preparation, and particularly relates to a method for preparing a platelet lysate through combination of freeze thawing and ultrasound and application of the platelet lysate. The method provided by the invention comprises the following steps: S1, preparing and obtaining platelet-rich plasma (PRP) by taking umbilical cord blood as a raw material; s2, adding a protective agent into the platelet-rich plasma prepared in the step S1; and S3, preparing platelet lysate (HPL) by using a freeze thawing and ultrasonic combination method. The platelet membrane can be more easily cracked by freezing and thawing through a combined method and then carrying out ultrasonic treatment; according to the protective agent, glutathione and glycerol are added to inhibit active oxygen generated by destroying cell membranes due to the cavitation effect in the ultrasonic process and protein structure damage caused by ice crystal formation in the freezing and thawing process, so that the problems of incomplete platelet lysis, serious growth factor and protein loss and the like in the HPL preparation process are effectively solved, the operation is simple and convenient, and the cost is low. And the cost can be effectively saved.

This invention provides a plant-derived bioactive polypeptide and its use in the prevention or treatment of Parkinson's syndrome, belonging to the field of polypeptide bioengineering technology. The amino acid sequence of the bioactive polypeptide is MKGASSIMYALG, and it is prepared from Fuding white tea raw materials through a directed two-step enzymatic hydrolysis process. This polypeptide can significantly alleviate 6-OHDA-induced damage to dopaminergic neurons in BZ555 nematodes and significantly improve motor dysfunction in Parkinson's syndrome model animals. Simultaneously, it can downregulate the expression levels of pro-inflammatory factors such as IL-1β and IL-18 in the serum of model mice, upregulate dopamine content in the substantia nigra region of brain tissue in model rats, and reduce monoamine oxidase B activity. These results indicate that the Fuding white tea-derived bioactive polypeptide of this invention has definite preventive and therapeutic effects on Parkinson's syndrome, and has significant development value and broad application prospects in the pharmaceutical field.

This invention relates to the field of functional film preparation technology, specifically to a method for preparing a wear-resistant, stain-resistant, transparent, and slip-resistant film, comprising a wear-resistant and hardening primer, a slip-resistant and transparent intermediate layer, and a wear-resistant and stain-resistant topcoat. The wear-resistant and hardening primer comprises hydroxyethyl acrylate modified amino resin, polyurethane oligomer, trimethylolpropane triacrylate, 1,6-hexanediol diacrylate, a mixed solvent, KH560 silane coupling agent, nano-alumina, polytetrafluoroethylene micropowder, photoinitiator 1173, silicone leveling agent, and isocyanate curing agent. The mixed solvent is composed of ethyl acetate and ethanol. This invention employs a three-layer synergistic coating system, significantly improving the bonding stability between the coating and the substrate, as well as between the coating layers, through functional differentiation design and interface optimization of the primer, intermediate layer, and topcoat.

The invention belongs to the field of pharmaceutical preparations, and particularly relates to an oral rapidly disintegrating tablet composition containing a sustained-release pellet core, a preparation method and a method for effectively improving the hardness of tablets. The invention provides a method for improving the hardness of tablets, which comprises the following steps of: granulating and tabletting raw materials containing maltose and / or maltitol in an environment with the humidity of 40-70%, and placing in an environment with the relative humidity of below 10% for 12-96 hours. According to the method, the hardness of the tablet containing one or more functional coating layers can be improved under the condition of low-pressure tabletting through a simple environment control means, and the functional coating layers are not damaged. The method can be achieved only by controlling the environment humidity in the production process, redundant operation steps are reduced, and the production efficiency is improved. The invention further provides a tamsulosin hydrochloride orally disintegrating sustained-release tablet and a preparation method thereof. The tamsulosin hydrochloride orally disintegrating sustained-release tablet is simple to prepare, the process is stable and controllable, and the hardness can be well improved.

The invention discloses a method for efficiently separating lead and arsenic from copper smelting dust pickle liquor, and relates to the field of metallurgical wet separation, the method realizes lead and arsenic separation through a SO2 reduction-ammonium acetate selective dissolution two-step process, and specifically comprises the four steps of pickle liquor pretreatment, SO2 reduction lead deposition, ammonium acetate arsenic dissolution and lead and arsenic product purification; the reduction potential is regulated to be 300-400 mV, the temperature is 30-50 DEG C, lead is precipitated in the form of PbSO4, and the precipitation rate is larger than or equal to 98%; 200-400g / L ammonium acetate solution is adopted to selectively dissolve arsenic, the arsenic dissolution rate is greater than or equal to 97%, and the lead loss rate is less than or equal to 1%; the method has the advantages of high separation efficiency, recyclable medicament and no secondary pollution, and is suitable for industrial separation of lead and arsenic in the copper smelting smoke acid leaching solution.