18results about How to "Avoid heavy use" patented technology

The invention belongs to the technical field of magnesium battery electrolytes, and discloses a magnesium battery electrolyte containing an insoluble additive and an application of the magnesium battery electrolyte, the insoluble indium additive is added into the magnesium electrolyte, such as In2O3 nano-particles, In2 (SO4) 3 nano-particles and nano In powder, and the insoluble indium additive is added into the magnesium electrolyte. The non-functionalized sites on the nano-particle cores interact with anions in the magnesium electrolyte to generate a synergistic effect, so that the anions in the electrolyte are fixed, the migration number of Mg < 2 + > and the ion utilization rate are increased, and transmission of magnesium ions is accelerated. The magnesium battery suspension electrolyte is simple in preparation process, low in viscosity and good in stability, the internal resistance of the battery is reduced, the performance of the battery is improved, and the cycle life of the battery is prolonged.

The invention discloses a high-performance water-based polyimide / carbon nanotube composite electromagnetic shielding film and a preparation method thereof. The preparation method comprises the following steps: reacting a first mixed reaction system containing a diamine monomer, a salt-forming reagent and a dianhydride monomer to obtain water-based polyamide acid salt; uniformly mixing the polyvinylpyrrolidone modified carbon nanotube aqueous dispersion liquid with the aqueous polyamide acid salt to form an aqueous polyamide acid salt / carbon nanotube dispersion liquid; and applying the water-based polyamide acid salt / carbon nanotube dispersion liquid to a substrate, and then carrying out thermal imidization treatment to prepare the high-performance water-based polyimide / carbon nanotube composite electromagnetic shielding film. The preparation method provided by the invention is simple, safe and environment-friendly, and is suitable for industrial popularization and application, and the finally prepared composite film can still maintain good mechanical properties and high-temperature electromagnetic shielding performance under the condition of high carbon nanotube content, and is beneficial to application in extreme environments.

The invention belongs to the technical field of electrolyte, and discloses magnesium battery electrolyte added with indium chloride and application of the magnesium battery electrolyte, the magnesium battery electrolyte is composed of one or more of a Grignard reagent system, an MACC system, an Mg-TFSI system, an Mg-B system and Mg-HMDS and indium chloride, the indium chloride is an additive which can be dissolved in the magnesium electrolyte without the assistance of a large amount of aluminum trichloride, and through the synergistic effect of electrolyte components and the indium chloride, the cycle life of the magnesium battery is prolonged, and the specific discharge capacity of the magnesium battery is improved.

The invention discloses a guided rocket inner ballistic proportioning parameter design method for reducing peak heat flow, which puts forward design requirements on guided rocket engine inner ballistic parameters from the perspective of overall design, introduces inner ballistic curve proportioning parameters, and realizes reduction of outer ballistic peak heat flow by optimizing the proportioning parameters. The matching parameters are iterated through a double-loop optimization framework, the outer loop aims at reducing peak heat flow, the inner loop is rapidly evaluated through a ballistic optimization method, and the optimal matching parameters of the inner ballistic of the guided rocket engine are rapidly obtained. According to the method, integrated design of the inner trajectory and the outer trajectory of the guided rocket is achieved, the design dimension of the guided rocket is increased, a new scheme optimization approach is provided for overall designers, and the adaptation degree of an overall scheme and an engine scheme is improved.

A wooden door with a ventilating window comprises a wooden door body and the ventilating window arranged on the upper portion of the wooden door body. The wooden door body comprises a wooden middle plate, the wooden middle plate is of a rectangular plate structure, and the two sides of the wooden middle plate are each provided with a set of long-strip-shaped protruding parts in the width direction of the wooden middle plate; the pair of two-side wooden clamping plates is symmetrically arranged on the two sides of the middle plate, the inner sides of the two-side wooden clamping plates are each provided with a set of groove parts matched with the set of long-strip-shaped protruding parts in an embedded mode, a rectangular ventilation opening is formed in the upper portion of the wooden door body, and the upper portion of the wooden door body penetrates through the wooden middle plate and the pair of two-side wooden clamping plates and is provided with a rectangular ventilation opening. The utility model has the advantages that the use of a large amount of adhesive is avoided, and adverse effects on health are reduced; steel nails are prevented from being used for fixing, deformation of the door plate is reduced, and rusting is avoided. Meanwhile, the ventilation effect of the wooden door is improved.

The invention discloses a method for synergistically preparing magnesium ammonium phosphate by treating ammonia-nitrogen wastewater with phosphate tailings, which comprises the following steps: roasting the phosphate tailings at high temperature to obtain roasted ore; the obtained roasted ore is subjected to digestion treatment, CO2 is introduced into ore pulp for carbonization, and the CO2 comes from roasting waste gas CO2 and carbon-containing flue gas; performing solid-liquid separation to obtain a first filtrate and a first filter residue, using the first filter residue to recover calcium, and using the first filtrate to treat ammonia-nitrogen wastewater; adding a phosphorus source and ammonia-nitrogen wastewater into the first filtrate, adjusting the pH value, and filtering after reaction to obtain a second filtrate and a second filter residue; the ammonia nitrogen content of the second filtrate is detected through Nessler's reagent spectrophotometry, and the ammonia nitrogen removal standard is met; and drying the second filter residue at low temperature to obtain a magnesium ammonium phosphate product. The method is low in production cost, high in product value and high in resource utilization rate, ammonia nitrogen in the wastewater can be efficiently removed, the environmental wastewater discharge standard is met, efficient value-added utilization of industrial by-products is achieved, and meanwhile the prepared magnesium ammonium phosphate product meets the industrial standard.

The application discloses a kind of sheet bismuth-based metal organic framework materials and preparation method thereof, comprising the following steps: bismuth salt and polybasic acid organic ligand are mixed, then mixed with grinding ball, ball milling treatment, obtain bismuth-based metal organic framework material.The application prepares bismuth-based metal organic framework material with sheet morphology structure by mechanical ball milling method, by using mechanical energy in ball mill to crush reactant, promote the rapid progress of bismuth metal ion and organic ligand reaction, the whole reaction process does not need solvent, or only needs trace amount of solvent, avoid the large use of organic solvent.The application can directly promote reaction at room temperature by mechanical force, and reaction time is short, yield is high, energy consumption is low, green and environmental protection.The bismuth-based metal organic framework material has unique sheet morphology structure, high specific surface area and high structural stability and the like characteristics, and size can be controlled, can be widely used in carbon dioxide adsorption reduction, adsorption of pollutants in water and the like fields.

The invention relates to a flotation method for lead-zinc-sulfide pyrite, and belongs to the flotation field in a mineral processing method. The lead-zinc-sulfide ore to be separated by flotation is ground to a particle size of less than 0.074 mm, which reaches 60-90%. The ore pulp is adjusted to a concentration of 28%-35%, and a regulator is added to make the pH value of the ore pulp 8-12. CaS in an amount of 1200-3200 g / t and butyl ether alcohol in an amount of 20-50 g / t are added to the obtained ore pulp to float the pyrite. A zinc inhibitor ZnSO4·7H2O in an amount of 500-1500 g / t is added to the obtained sulfur flotation tailings. The collector ethyl sulfide nitrogen is used in an amount of 40-80 g / t and the frother 2# oil is used in an amount of 30 g / t to prepare the slurry, and then the slurry is transported to the lead flotation system for flotation to obtain lead sulfide concentrate and lead flotation tailings; the obtained lead flotation tailings are added with a zinc sulfide activator CuSO4·5H2O in an amount of 100-400 g / t, a collector butyl xanthate is added in an amount of 100-200 g / t and the frother 2# oil is used in an amount of 30 g / t to prepare the slurry, and then the slurry is transported to the zinc flotation system for flotation to obtain zinc sulfide concentrate and flotation tailings; finally, high-quality pyrite concentrate, lead sulfide concentrate and zinc sulfide concentrate are obtained.

The invention provides an extraction method of egg phosvitin, the egg phosvitin is extracted by a magnetic separation technology by preparing a pH-sensitive composite magnetic nanogel, the pH-sensitive composite magnetic nanogel takes a magnetic porous gel as an inner core, after the surface of the magnetic porous gel is modified by polydopamine and athomin, the pH-sensitive composite magnetic nanogel is added into the magnetic porous gel, and the pH-sensitive composite magnetic nanogel is subjected to magnetic separation to obtain the egg phosvitin. And forming a sulfhydrylation shell layer, and connecting iron ions to the sulfhydrylation shell layer. According to the method, polydopamine combined on the surface of the magnetic porous gel can be rapidly combined with athomin with sulfydryl, and a sulfhydrylation shell layer is beneficial to combination of iron ions, so that egg phosvitin can be rapidly separated out under the action of an external magnetic field, finally, the external magnetic field is removed, and the egg phosvitin is placed in an alkaline environment; the egg phosvitin can be safely and efficiently separated out.

The invention relates to a preparation method of a gelidium amansii nano-cellulose-based antifouling coating, which comprises the following steps: S1, mixing a choline chloride-carboxylic acid eutectic solvent with gelidium amansii residues, and heating in an oil bath to obtain gelidium amansii cellulose; s2, the gelidium amansii cellulose is sequentially subjected to cellulase enzymolysis treatment and TEMPO oxidation method treatment, and gelidium amansii nanocellulose is obtained; s3, putting the gelidium nanocellulose and octadecylamine into an ethanol water solution according to a certain mass ratio, carrying out ultrasonic dissolution, adding a certain mass of dopamine hydrochloride, adjusting the pH value, and carrying out heating reaction polymerization at a certain temperature for a certain time by virtue of a one-pot method, so as to obtain the gelidium nanocellulose-based super-hydrophobic coating. And S4, finally, adding a certain mass of EGCG, and uniformly stirring to obtain the gelidium amansii nanocellulose-based antifouling paint. The invention not only provides an effective method for reutilization of the gelidium amansii residues, but also develops a novel bio-based antifouling coating through a green chemical technology, and makes a contribution to sustainable development of related industrial fields.

The application discloses PET matte master batches, a preparation method and application thereof, and belongs to the field of functional material modification. Barium sulfate is used as an extinction agent, the volume density of the barium sulfate is large, the barium sulfate can be well mixed with resin, the problem of layered mixing is solved, the color of the barium sulfate itself is white, and the color of the master batch is not affected. Moreover, the barium sulfate is compounded with organic modified layered silicate to produce a synergistic effect, the light transmittance is effectively improved, a high light transmittance, high haze and high gloss film product is successfully prepared, and the film product can be applied to high-end industries.

In order to solve the problems existing in the current mainstream ferrophosphorus slag treatment process, the invention provides a method for preparing regenerated iron phosphate by biologically leaching ferrophosphorus slag in a low-oxygen inert atmosphere, low-temperature and organic acid environment. The method specifically comprises the following steps: (1) adding organic acid into ferrophosphorus slag slurry, adjusting the oxygen concentration in a system, and then adding iron reducing bacteria for reduction leaching; (2) after the reaction is completed, carrying out solid-liquid separation to obtain solid waste residues and ferrophosphorus liquid; and (3) removing impurities from the ferrophosphorus liquid, sequentially adding an oxidizing agent and an alkaline substance, and carrying out solid-liquid separation to obtain iron phosphate.

The invention provides a mountain side slope vegetation drop forming module and a using method thereof.The module comprises a supporting plate, a net plate and plants, and one edge of the supporting plate is fixedly connected with a side slope and used for bearing cultivation and planting soil; the net plate is connected with the edge, away from the slope, of the supporting plate and used for preventing the cultivation and planting soil from flowing out of the supporting plate. The plants are planted in the cultivating and planting soil and are used for forming waterfall vegetation steps. By the adoption of the method, the modularized plant bearing structure can be installed on the mountain slope, plant-growing drop water is formed, the construction cost and time are saved, meanwhile, water and soil loss is prevented, and the method is environmentally friendly.

The invention discloses an electrochemical catalytic synthesis method of a macrolide compound, and belongs to the field of electrochemical catalytic synthesis. According to the method, triphenylphosphine is taken as a deoxidizing reagent, halide ions are taken as an electrocatalyst, a graphite flake is taken as an anode, foamed nickel is taken as a cathode, in the presence of additives DBU and the like, omega-hydroxycarboxylic acid shown in a structure I is subjected to constant-current electrolysis in a single-chamber electrolytic bath, and the lactone compound shown in a structure II is prepared in one step. The method is characterized in that the concentration of the active reaction intermediate is regulated and controlled by controlling the current density, so that a high dilution condition which must be adopted in a conventional method is avoided, and the synthesis of the macrolide compound under a high concentration condition is realized. The method can be carried out at the concentration up to 250 mM, complex slow dropwise adding operation is not needed, use of a large amount of solvent is avoided, and meanwhile the final product can be obtained only through one-step reaction. Compared with different methods under the same concentration, the method provided by the invention has more advantages. .

The application relates to a continuous solvent-free reaction synthesis method of cycloxazidone, and belongs to the technical field of organic synthesis. The method comprises the following steps: taking ethyl chloroformate and monocyane as raw materials to generate N-cyano ethyl carbamate; dimethyl sulfate is added to generate N-cyano-N-methyl ethyl carbamate; dimethylamine hydrochloride aqueous solution is added to generate ethyl N-methyl-N-(N', N'-dimethylformamidino) carbamate; cyclohexyl isocyanate is added to generate ethyl N-methyl-N-[(cyclohexyl carbamoyl) (dimethylamino) methylene] carbamate; and the ethyl N-methyl-N-[(cyclohexyl carbamoyl) (dimethylamino) methylene] carbamate is subjected to a cyclization reaction to generate cycloxazidone. The method avoids the large use of toxic and harmful solvents such as chloroform, and the wastewater after the reaction basically does not contain dimethylamine, and the COD and total nitrogen content are greatly reduced.

The invention relates to the field of hydrometallurgy, and particularly discloses a method for efficiently extracting lithium from a lithium-containing mother solution under the catalysis of carbon dioxide without alkali consumption, which comprises the following steps: S1, introducing carbon dioxide into the lithium-containing mother solution to adjust the pH value of the lithium-containing mother solution; s2, mixing a polyfluoro-substituted diketone extraction agent, a synergistic extraction agent and a diluent to prepare an extraction agent; s3, mixing the prepared extracting agent with the lithium-containing mother liquor with the adjusted pH value, and extracting according to a certain phase ratio to obtain raffinate and loaded organic matter; carrying out washing and reverse extraction on the loaded organic matter to obtain lithium-containing reverse extraction liquid; and S4, preparing battery-grade lithium sulfate or battery-grade lithium hydroxide or battery-grade lithium carbonate. The method adopts carbon dioxide to adjust pH, does not need to consume a large amount of acid and alkali, can prepare high-purity battery-grade lithium carbonate or lithium hydroxide monohydrate and battery-grade lithium sulfate products by recycling carbon dioxide generated in the extraction process, and has the advantages of easy control, simple operation, short process flow and high lithium recovery rate of the whole extraction system. The method has breakthrough significance in the battery recovery industry.

This invention belongs to the field of ultraviolet absorber technology, specifically relating to an ultraviolet absorber UV-323 and its preparation method. The preparation method includes the following steps: (1) diazotization reaction, (2) coupling reaction, (3) sulfide dispersion reduction, (4) esterification reaction, and (5) crystallization. The purity of the product of this invention is significantly improved. Through optimized process route and solvent recovery-recrystallization purification, the purity of the product can reach over 99%, and the appearance is a white powder, meeting the quality requirements of high-end application fields. The overall reaction yield of this invention is significantly improved. Through optimization of diazotization temperature control, improvement of coupling solvent system, selective reduction of sulfides, and precise control of esterification conditions, the yield of each step is effectively guaranteed, providing an economical and feasible technical solution for industrial-scale production.

The application provides a method for preparing fish skin collagen peptides with high antioxidant activity by DHPM and UIO-66 molecular imprinting, and relates to the technical fields of aquatic product deep processing and bioactive peptides. The method comprises the following steps: fish skin pretreatment, DHPM-induced collagen protein unfolding, endogenous enzyme autolysis, crude separation, selective target enrichment by using UIO-66 material with histidine as a molecular imprinting template, and drying collection. The application destroys the dense triple helix structure of collagen protein by using the physical field effect of dynamic high pressure microfluidization, exposes the enzyme cutting site, uses the endogenous enzyme of fish skin for autolysis, and then uses the histidine molecular imprinting UIO-66 material to accurately capture the high antioxidant activity peptide segment, so that the enzymolysis efficiency and the antioxidant activity of the product are significantly improved. The application does not need to add exogenous enzymes, and has the advantages of green process, low cost and high product purity. The obtained fish skin collagen peptides can be widely applied to the fields of functional food, cosmetics and medicine.