11results about How to "Precise control of process parameters" patented technology

The invention discloses a ferric sodium pyrophosphate composite positive electrode material and a preparation method and application thereof. The composite positive electrode material is composed of ferric sodium phosphate pyrophosphate and carbon, the surface of the ferric sodium phosphate pyrophosphate is coated with the carbon, the molar ratio of sodium to iron to phosphorus is 4: (3-y): 4, y is larger than 0 and smaller than or equal to 0.5, the carbon content is 1-10 wt%, and the composite positive electrode material does not contain associated phases. The preparation method comprises the following steps: adding water into an iron source, a sodium source, a phosphorus source and a carbon source to prepare a mixed solution, and drying to obtain precursor powder; sintering under the protection of inert gas to form a semi-finished body, carrying out ball milling or sand milling on the semi-finished body, and then carrying out spray drying; and finally sintering under the protection of argon or nitrogen to obtain a finished product. The raw materials are cheap and easy to obtain, process parameters are accurately controlled through a two-step heat treatment method, the compaction degree and the compaction degree of the material are remarkably improved, the electrochemical performance is optimized, and the preparation method has important application value in the field of sodium ion secondary batteries.

This invention relates to an integrated process apparatus and method for degumming Apocynum venetum, comprising a raw material pretreatment unit, a microwave-ultrasound synergistic pretreatment unit, a composite enzyme gradient degumming unit, a post-treatment unit, and an enzymatic hydrolysis product recovery unit connected in sequence. Each unit is connected via a sealed conveying mechanism. The invention also includes a central control system electrically connected to each unit to regulate its process parameters. A waste liquid conveying pipeline connects the composite enzyme gradient degumming unit and the enzymatic hydrolysis product recovery unit. The output of the enzymatic hydrolysis product recovery unit is connected to the composite enzyme gradient degumming unit via a reflux pipeline, enabling the recycling of biological enzymes. The method of this invention is simple, convenient to operate, and achieves good degumming effect. It yields high-quality Apocynum venetum fiber with high extraction rate, retains a large number of natural active ingredients, and realizes the high-value utilization of Apocynum venetum fiber.

This invention discloses a herbal skin-nourishing cream based on bamboo shoot extract as a solvent and its preparation method. The herbal skin-nourishing cream comprises an oil phase: petrolatum, squalane, dioctyl ether, glyceryl stearate, PEG-100 stearate, hydroxypinazone retinate, natural emulsifier, beeswax, tocopherol, cyclopentamethoxysiloxane, and oil-soluble fragrance; ethylhexylglycerin, niacinamide, and 10% citric acid are used to adjust the pH to 6.0-6.3. The aqueous phase comprises: pentylene glycol, panthenol, capryloyl hydroxamic acid, sodium hyaluronate, xanthan gum, dipotassium glycyrrhizate, sodium chloride, phenoxyethanol, p-hydroxyacetophenone, cellulose gum, and disodium EDTA; the balance is bamboo shoot extract. The average particle size of this invention is 1-5 μm, and the viscosity is 5000-8000 mPa·s. It has undergone heat resistance, cold resistance, centrifugal stability tests, and preservative challenges, demonstrating no stratification or deterioration. Human patch tests have proven its suitability for sensitive skin.

The application relates to the technical field of sodium ion battery negative electrode materials, in particular to a closed pore directional regulation and control bamboo-based hard carbon negative electrode material and a preparation method thereof. The method is used for preparing the bamboo-based hard carbon negative electrode material through bamboo material selection and pretreatment, three-stage gradient pre-oxidation, plasma activation, molten salt auxiliary step-by-step carbonization, deep acid pickling purification, and grading ball milling and surface carbonization coating steps, accurately regulates and controls a closed pore structure, reduces defects, improves a carbon yield and batch consistency, is applied to a sodium ion battery, and realizes synchronous improvement of a first circle coulomb efficiency, sodium storage capacity, rate performance and cycle stability.

This invention discloses a method for extracting high-purity ammonium tetramolybdate from a waste oil hydrogenation catalyst. S1, Primary ammonia dissolution: 28% ammonia water, water, and molybdenum acid extracted from the waste oil hydrogenation catalyst are added to a primary dissolution vessel. The mixture is stirred until the molybdenum acid is fully dissolved. The reaction time is controlled to 1 hour. The pH of the dissolved solution is 7-8. The molybdenum acid has a water content of 35% and a Mo content of 46-50%. This invention employs a stepwise deep impurity removal process of "magnesium chloride for phosphorus removal + 231 resin for vanadium removal," and sets up dual phosphorus and vanadium content detection to ensure that phosphorus <0.01g / L and vanadium <0.01g / L before proceeding to subsequent processes. The molybdenum-vanadium separation coefficient of 231 resin is much higher than that of ordinary resin, effectively avoiding impurity entrainment.

The application relates to the technical field of inductance manufacturing equipment, in particular to an integrated forming and welding device for inductance coil pins, which comprises a cabinet, a welding machine assembly is arranged in the cabinet, an operation platform is arranged at the top of the cabinet, a coil positioning assembly is arranged on the operation platform, symmetrically arranged mounting seats are arranged on the operation platform, coil terminal fixing assemblies are correspondingly arranged on the two mounting seats, coil terminal forming assemblies are slidably connected to the coil terminal fixing assemblies and arranged on the mounting seats, upper electrode assemblies of the welding machine assembly are fixedly arranged on the coil terminal forming assemblies, and lower electrode assemblies corresponding to the upper electrode assemblies are fixedly arranged on the coil terminal fixing assemblies; pin standby material assemblies are arranged on the two mounting seats and correspond to the coil terminal fixing assemblies. The application realizes integrated and accurate work of coil positioning, terminal forming, pin feeding and welding, is favorable for reducing process circulation time, improving single-process processing efficiency and reducing a production cycle.

This utility model relates to the field of busbar technology, and particularly to a high-temperature resistant insulating busbar. A high-temperature resistant insulating busbar includes a busbar conductor, the outer surface of which is coated with ceramic silicone, the outer surface of which is coated with fiberglass cloth or a polyimide film, and the outer surface of which is coated with a polyamide insulating layer. This utility model utilizes the complementary properties of polyamide and ceramic silicone to solve the problem of decreased mechanical properties and loss of insulation performance of traditional materials at high temperatures. Through the development of special pretreatment and composite processes, the interfacial bonding force between polyamide and ceramic silicone is enhanced, preventing delamination and peeling under high-temperature thermal stress. This achieves a uniform and dense coating of the insulating layer on the busbar surface, eliminating defects such as bubbles and impurities, and ensuring that the busbar still possesses reliable insulation performance and mechanical strength under high-temperature environments.

The invention relates to the technical field of plant effective component extraction, and discloses a method for extracting artemisinin through enzymolysis pretreatment, which comprises the steps of raw material pretreatment, composite enzymolysis pretreatment, ultrasonic-assisted extraction, impurity removal and concentration, purification and crystallization, and recrystallization and refining. A compound enzyme system composed of cellulase, hemicellulase and pectinase is adopted to conduct enzymolysis on artemisia annua powder, cell wall structures are destroyed to promote artemisinin release, ultrasonic-assisted extraction is combined to strengthen the extraction effect, and the product purity is improved through chitosan impurity removal, silica gel chromatography and two times of crystallization. The method is simple in process, environmentally friendly and energy-saving, effectively solves the problems that a traditional extraction method is low in extraction rate, insufficient in purity and high in cost, is suitable for large-scale industrial production, and has high practical value and industrialization prospects.

The invention relates to the technical field of high polymer materials, and particularly discloses an air duct cover plate injection molding part and a preparation method thereof. The invention discloses an air duct cover plate injection molding part which comprises the following components: 70-90 parts of HIPS (High Impact Polystyrene) resin, 3-10 parts of master batch A and 10-17 parts of master batch B, the master batch A is prepared from the following components in parts by weight: 20-30 parts of PET, 5-8 parts of a toughening agent and 1-2 parts of an antioxidant; the master batch B is prepared from the following components: 20 to 30 parts of PET (Polyethylene Terephthalate), 8 to 15 parts of a lubricant and 8 to 15 parts of modified montmorillonite. By utilizing the technical scheme provided by the invention, the prepared air duct cover plate injection molding part material has excellent impact resistance, excellent ethanol resistance and excellent grease resistance, and is particularly suitable for ventilation systems of automobiles and various equipment.

The invention provides a double-sided polishing method, double-sided polishing equipment and a silicon wafer, and the method comprises the steps: setting parameters, controlling the rotation speed of a bearing disc and the rotation speed of an upper fixed disc and a lower fixed disc, enabling the removal amount of the front surface of the silicon wafer to be greater than the removal amount of the back surface of the silicon wafer, and enabling the sum of the removal amount of the front surface of the silicon wafer and the removal amount of the back surface of the silicon wafer to be a target removal amount. According to the double-sided polishing method, the double-sided polishing equipment and the silicon wafer, the surface particle level of the silicon wafer obtained after polishing can be improved.

The utility model belongs to the technical field of sintering application, and particularly discloses a continuous type rapid hot pressing sintering device which is composed of an electric cylinder, an upper cross beam, an insulating gasket, a set of conductive copper bars, an automatic powder filling assembly, a middle die assembly, a gravity sensor, two sets of limiting rods, a pressing head fixing base, a lower cross beam, two sets of stand columns and the like. The sintering furnace has the beneficial effects that the sintering time can be remarkably shortened and the sintering efficiency can be improved by combining the effects of high temperature and high pressure, so that the requirement of large-scale production is met; by optimizing the heating and sintering modes, unnecessary energy loss is reduced, the overall energy consumption is reduced, and the current energy-saving and environment-friendly development trend is met; the sintering process can be ensured to be uniform and stable, so that the compactness, strength, wear resistance and other performance indexes of the product are improved; the sintering process is simplified, equipment requirements are reduced, the automation degree of a production line is improved, and the production cost is reduced.