25results about How to "Process environmental protection" patented technology

This invention relates to a flame retardant with both microwave absorption and smoke suppression functions. The flame retardant is a hierarchical porous metal-organic framework material with a three-dimensional polygonal structure, a size of 1-3 μm, and a pore size distribution between 1.0-50.0 nm. It carries nano-transition metal oxides internally and on its surface, with the nano-transition metal oxides accounting for 25%-65% of the total mass. The flame retardant provided by this invention possesses microwave absorption, flame retardancy, and smoke suppression properties. Its initial decomposition temperature is 442℃±10℃, with significant mass loss in the temperature range of 450-700℃. At 800℃, the residue content is as high as 50% or more, exhibiting excellent thermal stability and meeting the processing requirements for flame retardants in polyurea, epoxy resin, and polycarbonate.

The invention discloses a method for efficiently purifying gardenia blue pigment based on combination of ion exchange resin and an ultrafiltration membrane, and belongs to the technical field of natural pigment purification. The method comprises the following steps: adjusting the pH value of a gardenia blue pigment crude product solution to 5.0-7.0, pretreating, loading to anion exchange resin for adsorption, sequentially carrying out gradient elution by using 5% and 10% NaCl aqueous solutions, collecting pigment eluents with different molecular weight proportions, separating by using an ultrafiltration membrane with the molecular weight cut-off of 1000-4000 Da, and finally concentrating and drying. According to the method, efficient and specific removal of gardenoside, genipin and methanol is synergistically realized through charge selective adsorption and gradient elution of ion exchange resin in combination with precise screening of an ultrafiltration membrane, meanwhile, the pigment recovery rate is greater than 95%, the product impurity residue is low, the process is green, and the method is suitable for industrial production.

The utility model relates to a novel embedded packaging structure, including PCB board, chip and backing plate, the upper surface of backing plate is opened with mounting hole, the chip sintering is installed in mounting hole and is flush with the upper surface of backing plate and forms chip unit, the lower surface of PCB board is connected with a plurality of chip unit. This structure directly adopts the backing plate of copper material and is welded or sintering connection with PCB, need not to be plated copper, has reduced the process complexity, has reduced the chip warping risk, and the process is more environmental protection;The present application need not laser drilling, uses mature mechanical drilling + plating process instead reduces the process complexity, improves the yield rate;Move the chip to the outside of PCB, avoid the warping deformation caused by the big CTE difference between chip and PCB material, avoid the equipment damage, the mounting difficulty etc. caused by the high warping of PCB;The radiator is in direct contact with the backing plate through the connecting layer, and the heat dissipation path is shorter, the thermal resistance is lower, and the heat dissipation efficiency is improved.

The application discloses a kind of polyionic liquid modified self-supporting biochar electrode and its application in the field of capacitive deionization, belong to water treatment field.The application is deposited in self-supporting biochar electrode BSC surface by 1-vinyl-3-ethyl imidazole double trifluoromethanesulfonyl imidate salt ([VEIM][NTf2]), and polyionic liquid modified self-supporting biochar electrode is obtained;Afterwards, polyionic liquid modified self-supporting biochar electrode is used as electrode, and capacitive deionization desalination is carried out, and the salt adsorption capacity SAC of unit area A It can be as high as 0.921mg / cm 2 ; Strength is enough to withstand water flow impact in CDI operation.

This invention discloses a high-purity fluorobenzene recovery process in the production of 1,4-bis(4-fluorobenzoyl)benzene, belonging to the field of organic waste liquid recovery technology. Step 1 involves reacting the fluorobenzene waste liquid through a tubular reactor containing anhydrous aluminum chloride particles to obtain dehydrated fluorobenzene waste liquid. The reaction temperature is 5-40℃, the residence time is 60-200 min, and the flow rate of the fluorobenzene waste liquid is 0.1-0.4 m / min. Step 2 involves filtering the dehydrated fluorobenzene waste liquid through a micron filter, then distilling it in a fluorobenzene distillation column. The organic vapor at the top of the column is compressed by a compressor, heat-exchanged by an MVR heat exchanger, condensed, and then refluxed in a reflux tank. High-purity fluorobenzene is obtained from the fluorobenzene distillation column, wherein the fluorobenzene purity is greater than 99.99 wt% and the water content is less than 10 ppm. This invention uses fluorobenzene waste liquid from the production process of 1,4-bis(4-fluorobenzoyl)benzene as raw material. Through reaction dehydration, crystalline aluminum chloride filtration and distillation, it achieves continuous batch production of high-purity fluorobenzene. The process is simple and has low energy consumption.

The application relates to the field of lithium ion battery electrolyte additives, in particular to a high-yield synthesis method of high-purity tris(trihydrocarbylsilyl)borate, and the synthesis steps are as follows: first, urea and hexahydrocarbyldisilazane are reacted to prepare hexahydrocarbyldisilourea; second, boric acid and the hexahydrocarbyldisilourea are reacted to obtain tris(trihydrocarbylsilyl)borate crude product; third, the crude product is purified to obtain high-purity tris(trihydrocarbylsilyl)borate. The synthesis method provided by the application has the advantages of high reaction conversion rate and yield, high product purity, recyclable filter residue and solvent after reaction, reduced waste emission and green and environment-friendly process.

This invention discloses an ultra-low reflectivity optical element and its fabrication method, comprising: S1, substrate pretreatment; S2, PVD vacuum evaporation sequentially depositing a SiO2 underlayer and an Al2O3 thin film; S3, hydrothermally treating the coated substrate in neutral pure water at 60-100℃ for 30-120 minutes to form a gradient refractive index porous structure in the Al2O3 thin film; S4, drying treatment. The resulting optical element comprises a substrate, a SiO2 underlayer, and an Al2O3 thin film layer. The Al2O3 thin film layer has a gradient refractive index porous structure with a continuous transition from high porosity at the surface to low porosity at the bottom, and an average reflectivity ≤0.1% in the wavelength range of 380-780nm. This invention features a simple and environmentally friendly process, is suitable for glass and plastic substrates, exhibits excellent film adhesion, and can be widely used in high-end optical equipment such as mobile phone lenses and automotive lenses.

This invention discloses a high-functionality defatted rice bran, its preparation method, and its applications. The method includes: stabilizing fresh rice bran with saturated steam to inactivate lipase, obtaining stabilized rice bran; then using the stabilized rice bran as raw material, extracting and defatting it with supercritical CO2 to separate rice bran oil and high-functionality defatted rice bran. Preferably, the saturated steam treatment temperature is 115-125℃, and the time is 15-25 min; the supercritical CO2 extraction temperature is 45-55℃, the pressure is 25-35 MPa, and the time is 1.5-2.5 h. The defatted rice bran prepared by this invention has a fat content of less than 1.5%, a water-holding capacity of more than 3.0 g / g, an oil-holding capacity of more than 2.4 g / g, and an expansion potential of more than 5.8 g / g. This method is green and environmentally friendly, significantly improving the functional properties of defatted rice bran. The resulting product can be used as a high-dietary-fiber ingredient in baked goods, showing good application prospects.

This invention discloses a furfuryl alcohol copolymer-coated ammonium polyphosphate and its application in the preparation of flame-retardant composite materials, belonging to the field of flame-retardant materials technology. The invention involves mixing furfuryl alcohol, electron-accepting monomers, crosslinking agents, and initiators with ammonium polyphosphate in a solution, causing furfuryl alcohol, electron-accepting monomers, and crosslinking monomers to precipitate and polymerize on the surface of the ammonium polyphosphate, forming a furfuryl alcohol copolymer-coated ammonium polyphosphate. This furfuryl alcohol copolymer-coated ammonium polyphosphate, as a flame retardant, can be compounded with polyurethane foam, thermoplastic polymers, and thermosetting polymers to prepare polyurethane foam flame-retardant composite materials, thermoplastic flame-retardant polymer composite materials, and thermosetting flame-retardant polymer composite materials, respectively. The furfuryl alcohol copolymer-coated ammonium polyphosphate exhibits good dispersibility in the polymer matrix, good interfacial compatibility, and is easily modified, significantly improving the flame-retardant properties of the composite material while maintaining its excellent mechanical properties.

This invention provides a quenching process for H13 alloy steel titanium die, including a heating stage and a cooling stage. The heating stage is characterized by heating the workpiece to 1000-1070°C using a stepped heating method. The cooling stage includes at least a cooling step of placing the workpiece in an air-cooled environment by rotating the workpiece to cool it down.

This invention provides a method for recovering and regenerating graphene from the negative electrode of spent lithium batteries, comprising the following steps: S1. Charging the spent lithium batteries to a state of charge (SOC) of 20-40%; S2. Disassembling and crushing the spent lithium batteries in an inert atmosphere to obtain a negative electrode sheet; S3. Separating the negative electrode current collector and the negative electrode active material layer from the negative electrode sheet. The negative electrode active material layer contains graphite. The negative electrode active material layer is collected and subjected to ultrasonic, centrifugation, and drying treatments in sequence to obtain a solid mixture; S4. Calcining the solid mixture at a temperature not exceeding 400℃ to obtain spent graphite; S5. Dispersing the spent graphite evenly in an organic solvent, followed by ultrasonic-assisted exfoliation. After ultrasonication, the graphite is centrifuged, filtered, and freeze-dried to obtain graphene. The organic solvent includes at least two of DMSO, NMP, GBL, CYC, and IPA. This invention achieves a gentle and efficient recovery of spent graphite and obtains high-quality graphene through a dual-solvent method.

The application relates to the technical field of semiconductor catalysts, in particular to a high-entropy semiconductor catalyst as well as a preparation method and application thereof, and the preparation method of the high-entropy semiconductor catalyst comprises the following steps: at least one metal salt is mixed with water to obtain a metal salt solution; the metal salt solution is mixed with an amine organic ligand, centrifugal washing and freeze-drying treatment are carried out, and a multi-metal complex is obtained; the multi-metal complex is calcined under an inert atmosphere, and a high-entropy semiconductor catalyst is obtained. In the case of coordination atom anchoring, the movement of metal atoms is limited, so that a carbon-nitrogen-doped high-entropy semiconductor catalyst is obtained. The high-entropy semiconductor catalyst prepared by the preparation method has the characteristics of rich catalytic active sites, good chemical stability and uniform distribution of elements, the preparation method is simple and easy to realize, the production process is green and environment-friendly, and the high-entropy semiconductor catalyst is easy to realize large-scale production and is conducive to large-scale popularization and use.

The application relates to the technical field of nanomaterial preparation, in particular to a method for preparing Cu@Ag particles by laser, which comprises the following steps: S1, preparing a solution: dissolving a copper precursor in a solvent to obtain a copper precursor solution, and dissolving a silver precursor in a solvent to obtain a silver precursor solution; S2, irradiating the copper precursor solution by using a femtosecond pulse laser to generate nano-copper particle cores through reduction; S3, adding the silver precursor solution into the liquid phase environment containing the nano-copper particle cores, adjusting the wavelength parameter of the picosecond pulse laser to the surface of the nano-copper particle cores to realize laser energy focusing, irradiating the solution by using the picosecond pulse laser, allowing silver ions to be reduced and deposited on the surface of the nano-copper particle cores to form a silver shell, and thus obtaining Cu@Ag particles, so that the problems that the existing chemical reduction method is not environmentally friendly and it is difficult to accurately control the generation sequence of the core and the shell are solved.

This invention discloses a method for preparing Yuanjiang asparagus extract and its application. The method uses fresh Yuanjiang asparagus tender stems as raw material. After selection, washing, freeze-drying, pulverizing, and sieving, choline chloride and 1,2-propanediol eutectic solvent are added for constant-temperature extraction. After ultrasonic temperature control, cellulase and pectinase are added for complex enzymatic hydrolysis. After heating to inactivate the enzymes, centrifugation is performed, and the supernatant is collected to obtain the crude extract of Yuanjiang asparagus saponins. This method has high extraction efficiency, and the obtained asparagus saponins have strong antioxidant activity, exhibiting strong scavenging ability against DPPH, ABTS, and hydroxyl radicals, as well as Fe... 2+ The chelation rate was high, and it showed significant in vitro inhibitory effects on the proliferation of human colorectal cancer cells Caco-2 and human hepatocellular carcinoma cells HepG2. The raw material used in this method is fresh, tender stems of Yuanjiang asparagus, which is widely available and of excellent quality. The extraction process is green, environmentally friendly, and simple, not only improving the comprehensive utilization value of Yuanjiang asparagus but also providing a new method for extracting natural saponin active ingredients. The obtained asparagus saponins can be used to develop antioxidant and anti-tumor functional foods, showing potential market prospects.

The invention relates to a method for preparing manganous-manganic oxide by regenerating waste lithium manganate, which comprises the following steps: 1) uniformly mixing waste lithium manganate with pure water and concentrated sulfuric acid to obtain slurry; (2) carrying out solid-liquid separation on the slurry obtained in the step (1), and then drying to obtain a dried product; (3) crushing the dried product obtained in the step (2), and sintering in an inert gas atmosphere; 4, after sintering is finished, cooling is conducted to the room temperature, pure water is added, stirring and water dissolving are conducted, solid-liquid separation is conducted again, filter residues are dried, and the manganous-manganic oxide is obtained.The method is easy to operate, waste gas and high-acid and high-alkali waste water are not generated in the recycling process, the technology is environmentally friendly, the manganese content of the prepared manganous-manganic oxide can reach 71.50% or above, the manganous-manganic oxide can be directly used for producing lithium manganate, and high performance is achieved.

The application discloses a cucumber seed oil extract, a preparation method and application thereof, cosmetics and medicines. The method comprises the following steps: providing dried cucumber seeds; seed oil extraction, comprising squeezing the dried cucumber seeds or performing supercritical carbon dioxide extraction after crushing to obtain crude cucumber seed oil; seed oil purification, comprising removing water-soluble organic acids in the crude cucumber seed oil to obtain an oil phase liquid; deodorization, comprising deodorizing the purified oil phase liquid to obtain deodorized crude cucumber seed oil; degreasing, comprising removing solid esters in the deodorized crude cucumber seed oil to obtain degreased crude cucumber seed oil; and impurity removal and drying of the degreased crude cucumber seed oil to obtain the cucumber seed oil extract. The preparation method of the cucumber seed oil extract is capable of obtaining the cucumber seed oil extract through drying, seed oil extraction, seed oil purification, deodorization, degreasing, impurity removal and drying in sequence, and has the advantages of simple operation, high yield, low cost, stable product quality, green and environment-friendly process and suitability for large-scale production.

This invention discloses a glycerol / polyethylene glycol-based aspartic acid monoester amphoteric-nonionic surfactant and its preparation method, belonging to the field of specialty surfactant technology. Using maleic anhydride, low-melting-point polyols with excellent melt miscibility, and fatty primary amines as raw materials, the invention prepares the target product through a three-step reaction involving selective monoesterification, Michael addition, and acid-base equivalent neutralization. The reaction atmosphere can be selected based on the characteristics of the polyol materials. This invention avoids the use of high-boiling-point solvents throughout the process, enabling directional monoester synthesis and effectively solving the technical pain points of traditional aspartic acid ester products, such as disordered composition, difficult purification, and limited industrial production. This product combines the advantages of mild and low-irritation amphoteric surfactants with the acid, alkali, and salt resistance of nonionic surfactants. The overall preparation process is green and simple, with adjustable performance, suitable for large-scale industrial production, and has broad application prospects in the fields of daily chemicals, pharmaceuticals, and industrial emulsification.

This invention relates to two-dimensional material preparation technology, specifically to a method for preparing high-quality oxide nanosheets and thin films based on liquid-phase exfoliation. The method involves synthesizing a layered precursor through a solid-phase reaction, followed by ion exchange using a protic acid to replace interlayer metal ions with hydrogen ions, thereby weakening the interlayer forces. Then, efficient and low-defect liquid-phase exfoliation is achieved through gentle mechanical oscillation with an organic base, yielding a single-layer or few-layer oxide nanosheet dispersion. Film formation is then achieved using two different methods: spin coating and layer-by-layer self-assembly. In summary, this invention avoids the damage to the material structure caused by traditional ultrasonic exfoliation and the harm to the human body caused by the use of highly toxic organic solvents. Furthermore, the process is simple, and the method for preparing two-dimensional oxide nanosheets and thin films has a certain degree of universality. The film formation is controllable, and the prepared thin films can be applied to fields such as memristors and optoelectronic devices.

This invention specifically relates to a thermal insulation fabric and its preparation method. The thermal insulation fabric comprises the following raw materials in parts by weight: 70-90 parts of ethylene-vinyl acetate copolymer, 2-12 parts of polyethylene, 3-10 parts of polyolefin elastomer, and 3-10 parts of thermoplastic polyurethane, or further comprising 4-10 parts of ethylene propylene diene monomer (EPDM) rubber, 6-12 parts of foaming agent, and 0.5-5 parts of additives. For different formulation characteristics, supercritical physical foaming process and chemical foaming process are provided respectively. The supercritical process uses nitrogen and carbon dioxide as foaming agents, which is environmentally friendly and leaves no residue; the chemical foaming process ensures uniform dispersion of components through mixing and refining, and has strong process adaptability.

The application belongs to the technical field of cosmetics, and discloses a portulaca oleracea seed oil, a preparation method and application thereof, cosmetics, medicines and food. The portulaca oleracea seed oil comprises, in percentage by mass, 33-37% of linoleic acid, 24-27% of linolenic acid, 15-18% of oleic acid, 14-16% of palmitic acid, 3.5-4.5% of stearic acid, 0.5-1% of isooleic acid and 0.3-0.4% of behenic acid. The portulaca oleracea seed oil prepared by the preparation method of the application can effectively promote the proliferation of immortalized keratinocytes, reduce the production of inflammatory factors, has strong anti-inflammatory effect, can promote the expression of filaggrin and tight junction protein genes and has barrier repair effect. The preparation method of the portulaca oleracea seed oil comprises sequentially drying, seed oil extraction, seed oil purification, decolorization, impurity removal and drying to obtain the portulaca oleracea seed oil, and has the advantages of simple operation, high yield, low cost, stable product quality, green and environment-friendly process and suitability for large-scale production.

This invention discloses a universal method for preparing two-dimensional metal nanosheets via an in-situ electrochemical reduction process: first, metal tellurides or metal selenides are subjected to freeze-sonic liquid-phase exfoliation to obtain two-dimensional metal telluride nanosheets or two-dimensional metal selenide nanosheets; then, the two-dimensional metal telluride nanosheets or two-dimensional metal selenide nanosheets are reduced in an H-type electrolytic cell system to obtain the two-dimensional metal nanosheets. The preparation method of this invention is simple to operate, requires no complex equipment, and operates under mild conditions. The prepared two-dimensional metal nanosheets have broad prospects for applications such as the electrochemical C-N coupling synthesis of urea.

This invention discloses a method for preparing biomass hard carbon anode materials without acid washing, comprising the following steps: using pure water as a solvent, placing biomass particles in a Soxhlet extractor, continuously circulating and extracting the biomass particles under reflux conditions for 2-5 hours; after extraction, removing the solid and drying it to obtain water-extracted purified biomass; heating the obtained water-extracted purified biomass to 300-550°C at a heating rate of 2-10°C / min, holding it at this temperature for 2-5 hours, then naturally cooling it to room temperature, and then washing and drying it with pure water; heating the obtained pre-oxidized carbonized product to 1100-1550°C at a heating rate of 2-10°C / min, holding it at this temperature for 3-6 hours, and then naturally cooling it to room temperature; washing the obtained carbonized product with pure water until the filtrate is neutral, and then drying it. Compared with the prior art, this method solves the problems of serious wastewater pollution, significant safety hazards, high costs, long production cycles, and the easy introduction of oxygen-containing defects that damage electrochemical performance.

This invention relates to a method for determining the 1,4 structure content in liquid isoprene rubber. The method involves obtaining the absorbance of the 1,4 and 3,4 structures in the liquid isoprene rubber using infrared spectroscopy, and then substituting the absorbance values ​​into the following formula to calculate the percentage content of the 1,4 structure. 1,4 =100 × 8.03A 836 / (7.83A 836 +A 888 )%; of which, W 1,4 Represents the percentage content of the 1,4 structure, A 836 and A 888 These represent the corrected absorbance values ​​for structures 1,4 and 3,4 in the infrared spectrum, respectively. Compared with existing technologies, the detection method of this invention is simple to operate, environmentally friendly, and produces highly accurate results, providing a new method for the analysis of 1,4 structures in LIR.

The application discloses a method for producing fuel oil from waste plastics. The method comprises the following steps: mixing waste plastics with solvent oil and heating to melt, filtering the insoluble substances, and then flash evaporating and recovering the solvent oil to obtain molten plastics; mixing the molten plastics with vacuum gas oil to obtain blended oil; under a hydrogen atmosphere, the blended oil is subjected to hydrofining and hydrocracking reactions in sequence under the action of catalysts to generate fuel oil, and through a fractionation system, naphtha, kerosene and diesel are obtained. In the application, the pretreatment process effectively removes inorganic additives in the waste plastics, reduces pollution and blockage of subsequent devices, reduces the generation yield of gas products in the waste plastic treatment process, and maximizes the production of naphtha, kerosene and diesel products.

The application discloses a high-stability peach gum polysaccharide nanoemulsion loaded with hydrophobic functional molecules and a preparation method thereof, and relates to the field of natural polymer materials and nanotechnology. The peach gum polysaccharide is chemically modified by thioctic acid, the balance of hydrophilicity and hydrophobicity in the molecular structure is effectively regulated, and thus the peach gum polysaccharide is endowed with excellent self-emulsifying capacity. A plurality of hydrophobic functional components can be efficiently loaded without additional addition of synthetic emulsifiers, the obtained nanoemulsion system is uniform and stable, and has good biocompatibility and slow-release performance. The emulsification and active component loading process are integrated in one step, the process flow is simplified, the loss of active components in multi-step operation is effectively avoided, the preparation efficiency and practicability are significantly improved, and a new way is provided for efficient and safe delivery of natural functional components.