14results about How to "Low raw material cost" patented technology

This invention discloses a carbon-sulfur battery and its preparation method. A sulfur-carbon compound containing C-S and S-S (sulfur atom number ≤ 4) structural units is used as the positive electrode active material. In-situ pre-lithiation is performed inside the battery package to prepare the positive electrode, and a carbon-based material is used as the negative electrode active material to prepare the negative electrode. The resulting carbon-sulfur battery with the above positive and negative electrode system is further assembled. This battery utilizes the lithium fusion reaction of the sulfur-carbon compound positive electrode material and the intercalation or alloying lithium fusion reaction of the carbon-based negative electrode to achieve an electrochemical redox reaction between the positive and negative electrode systems, thereby converting chemical energy into electrical energy. The sulfur-carbon compound positive electrode material exhibits high structural stability during the lithium fusion reaction. Compared to the loss of positive electrode active material caused by soluble lithium polysulfides during the discharge of elemental sulfur positive electrodes, a positive electrode with high cycle stability can be obtained. Furthermore, by utilizing the reversible lithium intercalation / deintercalation or alloying reaction of carbon-based materials to replace the unstable and highly active metallic lithium negative electrode, high cycle stability of the negative electrode can be achieved.

This invention discloses an internally threaded steel pipe, its processing technology, and processing device. The internally threaded steel pipe includes a stainless steel inner tube (1), which is formed by rolling stainless steel strip. The inner wall of the stainless steel inner tube (1) is provided with thread teeth (2). The number of thread teeth (2) is multiple and they are distributed in a ring along the inner wall of the stainless steel inner tube (1). A thread groove is formed between adjacent thread teeth (2). This invention can reduce the production cost of internally threaded pipes for air conditioners and improve their service life.

This invention discloses a method and application for treating moldy corn to synthesize polyhydroxy fatty acids (PHA) using a compound enzyme preparation, relating to the fields of fermentation engineering and waste resource utilization technology. The method for treating moldy corn to synthesize PHA using a compound enzyme preparation includes the following steps: 1) screening and culturing highly efficient halophilic bacteria as inoculum strains for open-enzyme PHA synthesis; 2) pretreating moldy corn with a compound enzyme preparation composed of α-amylase, β-amylase, and glucoamylase; 3) using the moldy corn hydrolysate as a fermentation carbon source, inoculating with PHA-producing halophilic bacteria for open-enzyme fermentation. This invention constructs a complete process system of specific halophilic bacteria screening – moldy corn enzymatic pretreatment – ​​open-enzyme fermentation to synthesize PHA, realizing the resource utilization and high-value utilization of moldy corn. Compared with existing technologies, it has significant economic, environmental, and industrial value, with outstanding comprehensive beneficial effects.

The application relates to a chiral triazole-oxazoline compound and a preparation method and application thereof, and belongs to the technical field of organic synthesis. The chiral triazole-oxazoline compound has the structural formula: the preparation method comprises the steps of click reaction, triazole N2 substitution reaction, Suzuki coupling, triazole ester hydrolysis, amidation with a chiral amine alcohol and dehydration condensation. After a chiral triazole-oxazoline compound and a palladium salt compound are added to generate a catalyst in situ, asymmetric addition of aryl boronic acid on a carbon-carbon double bond of a prochiral organic compound is carried out to prepare a chiral organic compound. The application has the advantages of low raw material cost, few synthesis steps, low experiment site requirement, relatively mild reaction conditions and simple operation for preparing the novel triazole-oxazoline compound.

This solution provides a design method and electronic device for composite resistive pastes with target resistance values. It uses the resistance parameter sets and mixing ratios of each composite resistive paste and corresponding first and second resistive pastes as training data sets. The training data sets and parameter acquisition instructions are input into a regression prediction model for training, outputting optimized resistance parameters and the optimal number of regression equation terms. The target resistance value of the composite resistive paste and the optimized resistance parameters of the first and second resistive pastes are used as prediction parameter sets. The prediction parameter sets and prediction instructions are input into the trained regression prediction model, outputting the predicted mixing ratio of the first and second resistive pastes, thereby achieving efficient design of composite resistive pastes with target resistance values.

This invention discloses a diesel engine catalyst based on high-entropy oxides and modified adsorbents, and its preparation method. The catalyst uses PtCeFeMnCoO5 high-entropy oxide nanoparticles as the main catalytic active component, supplemented by Cu-Fe modified hydrotalcite-derived composite oxides, CeO2, ZrO2, γ-Al2O3, and cordierite honeycomb ceramic support. The PtCeFeMnCoO5 high-entropy oxide nanoparticles, as the main catalytic active component, possess advantages such as sulfur resistance, heat resistance, and low cost. The internal five-membered metal oxides synergistically enhance the catalyst's catalytic activity and extend the high-activity temperature window. The pre-adsorption and subsequent gelation preparation method based on a carbon black adsorption matrix significantly improves the dispersion effect of the five-membered high-entropy oxide precursor, increases the number of adsorption / catalytic active sites of the five-membered high-entropy oxide, enhances the overall NOx purification performance of the LNT catalyst, and achieves precious metal reduction. The modified hydrotalcite-derived composite oxides replace the Al2O3 coating additive, significantly improving the NOx adsorption capacity of the LNT catalyst.

This invention provides a method for regenerating and reusing copper nitrate stripping wastewater. The method includes the following steps: providing copper nitrate stripping wastewater; mixing the wastewater with additives and electrolyzing it to obtain metallic copper and an electrolyzed solution; the additives include sulfamic acid and urea; and replenishing the electrolyzed solution with acid to obtain a regenerated copper nitrate stripping solution. This invention adds sulfamic acid and urea, which are well-compatible with the copper nitrate stripping wastewater, as additives. Through their synergistic effect, the efficiency of copper extraction via electrolysis is significantly improved, achieving high-efficiency and high-value copper recovery, and increasing the acidity of the electrolyzed solution. Furthermore, only a small amount of acid replenishment is needed to restore the copper stripping capacity, greatly reducing acid consumption and achieving low-cost recycling. This method is simple, has a high resource recovery rate, and can effectively reduce the raw material and environmental costs of the copper stripping process, offering both economic and environmental benefits.

The present application relates to a kind of adjustable diameter reamer device and cutting equipment, including reamer unit, it includes tool disc, reamer blade and adjusting assembly, reamer blade is detachably assembled in tool disc;Adjusting assembly includes adjusting expansion pin and first connecting piece, adjusting expansion pin includes base, connecting column and first threaded hole, base is coaxially connected with connecting column, first threaded hole is arranged through base and connecting column, base has first end and second end along the axial direction, the diameter of first end is less than the diameter of second end, and first end is connected with connecting column;Second threaded hole and first positioning hole are provided in tool disc, the pitch of first threaded hole is less than the pitch of second threaded hole, and first threaded hole and second threaded hole are connected by first connecting piece.The present application can realize the micro-adjustment of tool disc diameter, meet the machining precision requirement of IT6 level in lathe machining, using independent modular tool disc structure, it is beneficial to carry out quick changeover, without repeated purchase connecting rod and tool handle, effectively reduce use cost.

This invention relates to a pressure-sensitive carbon-coated current collector, its preparation method, and a lithium-ion battery. The pressure-sensitive carbon-coated current collector includes a current collector foil and a conductive carbon layer located on at least one side of the current collector foil. The conductive carbon layer includes a pressure-sensitive binder, a first conductive carbon and a second conductive carbon with different particle sizes, and a dispersant. The conductive carbon layer of this invention, comprising a pressure-sensitive binder, a first conductive carbon, a second conductive carbon, and a dispersant, combines the pressure-sensitive binder with the first and second conductive carbons of different particle sizes. Under room temperature and rolling conditions, this significantly improves the adhesion between the dry electrode layer / electrode slurry coating and the current collector, achieving a tighter conductive contact between the current collector and the electrode layer. This is particularly suitable for preparing battery electrodes using dry processes. Electrodes prepared using the pressure-sensitive carbon-coated current collector can maintain a tight and durable conductive contact and stable electrochemical performance even after repeated electrochemical cycles.

This invention discloses a solar cell and its fabrication method, components, and system. The solar cell includes a silicon substrate, a doped layer and a passivation layer sequentially stacked on the back side of the silicon substrate. The passivation layer has electrode trenches that locally expose the doped layer, and the electrode trenches are provided with a back electrode. The back electrode includes a seed metal silicide layer, a seed metal oxide thin layer, a mixed conductive layer, and an outer metal layer sequentially stacked on the back side of the locally exposed doped layer. The seed metal silicide layer is one or more layers selected from molybdenum silicide, nickel silicide, and titanium silicide layers; the seed metal oxide thin layer is one or more layers selected from molybdenum oxide, nickel oxide, and titanium oxide thin layers; and the thickness of the seed metal oxide thin layer is no greater than 20 nm. This solar cell has a novel electrode structure, which can promote improvements in electrode structure and performance, and reduce costs. The novel electrode structure of this solar cell exhibits good current transport performance and low metal recombination loss.

The application discloses a kind of composite tin paste for SEM chip and preparation method thereof, belong to composite tin paste technical field, including SnAgCu alloy spherical powder, spherical copper powder and soldering paste;Wherein, the particle size range of SnAgCu alloy spherical powder is 20~75 μm;The particle size range of the spherical copper powder is 1~60 μm;The mass percentage of the spherical copper powder in the total mass of alloy contained in the composite tin paste is 20%~70%;The soldering paste includes by mass percentage: rosin resin 40%~60%, organic acid activator 5%~15%, thixotropic agent 3%~8%, antioxidant 0.1%~5%, and the balance is organic solvent.The application adds the spherical copper powder with mass percentage 20%~70% and particle size range 1~60 μm in SnAgCu alloy spherical powder, substantially replaces expensive silver, significantly reduces the raw material cost of tin paste under the premise of guaranteeing or even improving welding performance, overcome the technical problems that the cost of existing SnAgCu tin paste is high due to high silver content.

This invention relates to the C10L9 / 10 field of IPC classification, and particularly to a coal-saving catalyst for thermal power plants and its preparation method. The coal-saving catalyst, by mass percentage, comprises the following raw materials: 5-20% gluconate, 10-20% diol, 5-13% citrate, 3-10% oxygen-containing free radical organic matter, 1-3% molasses, 0.1-1% dispersant, and deionized water to make up the balance. The coal-saving catalyst prepared in this application has excellent effects in promoting coal combustion, reducing burnout, improving combustion efficiency, and reducing pollutant emissions. It also effectively enhances the mutual wetting effect of the coal system and strengthens the penetration of the coal-saving catalyst within the coal system. It is suitable for promotion in the thermal power field and has broad development prospects.

This invention provides an aluminum alloy composite brazing plate and its preparation method. The composite brazing plate includes a core layer and a brazing layer. The core layer is made of an aluminum-manganese alloy, with a manganese content of 0.5–1.5 wt%. In the alloy microstructure of the core layer, the R-Cube texture area accounts for 10–20%, and the P-texture area accounts for 10–20%. The core layer is in the O state. The brazing layer is made of an aluminum-silicon alloy. The method of this invention regulates the microstructure of the material through homogenization heat treatment, cold rolling, and two-stage annealing during the preparation of the composite brazing plate. This controls the area ratio of R-Cube and P-textures within the material microstructure, resulting in a lower recrystallization activation energy for the composite plate material, improving its corrosion resistance, ensuring its strength while avoiding excessive reduction in elongation, thus giving it good formability.