27results about How to "No generation" patented technology

The preparation method comprises the following steps: mixing polysaccharide gum with water, carrying out wet ultrafine grinding to obtain an ultrafine polysaccharide gum aqueous solution, and uniformly infiltrating the polysaccharide gum into cellulose or derivatives thereof by adopting high-shear mixing to form micelles; and promoting the micelles to form a honeycomb structure through microwave vacuum drying, and finally spraying ultrapure water atomized by high pressure to the honeycomb micelles and drying to obtain the hydrogel for absorbing grease. The water absorption capacity of the prepared hydrogel reaches 100 times or above, the storage modulus is 1350 Pa or above, grease can be efficiently absorbed, and the hydrogel has wide development prospects in the field of weight-reducing medicine or food.

The invention relates to a preparation method of AnO2 type MOX fuel powder, which comprises the following steps: preparing a mixed actinide eutectic melt from a mixed actinide salt and a urea solid, and carrying out deamination and denitrification / decarbonization on the mixed actinide eutectic melt to directly obtain the AnO2 type MOX fuel powder, the mixed actinide salt consists of tetravalent actinide nitrate and tetravalent actinide oxalate; when the tetravalent actinide nitrate is a plutonium nitrate pentahydrate solid, a thorium nitrate hexahydrate solid or a U (NO3) 4.3-4H2O solid, and the tetravalent actinide oxalate is a thorium oxalate hexahydrate solid, a plutonium oxalate hexahydrate solid or an oxalic acid U (IV) solid, the AnO2 type MOX fuel powder is (ThxPu1-x) O2, (UxTh1-x) O2 or (UxPu1-x) O2 powder. According to the preparation method, plutonium nitrate / thorium nitrate / U (NO3) 4. 3-4H2O and thorium oxalate / plutonium oxalate / oxalic acid U (IV) are directly adopted as raw materials, the preparation process flow of the AnO2 type MOX fuel powder can be simplified, the use of process reagents is reduced, and no process waste liquid is generated, so that the preparation method of the MOX fuel powder, which is simple, convenient, high in production efficiency, free of waste liquid and more economical and green, is provided.

The invention provides a preparation method of a composite catalytic material for degrading microplastics in water, and belongs to the technical field of water treatment. Comprising the following steps: S1, cleaning, drying, crushing and sieving walnut shells in sequence, S2, adding the walnut shells into a mixed solution containing Co (NO3) 2.6 H2O, La (NO3) 3.6 H2O and citric acid, stirring and mixing at room temperature, regulating the pH value of the mixed solution by adopting ammonia water until lanthanum cobaltate is precipitated on the surfaces of walnut shell powder particles, and then heating in a water bath until the moisture of the mixed solution is completely evaporated; s3, sequentially performing drying and grinding treatment on a mixture obtained by coprecipitation, and performing pyrolysis treatment to obtain the lanthanum cobaltate-biochar-based composite catalytic material. The prepared composite catalytic material is simple in preparation process, has the function of efficiently activating peroxymonosulfate, and has a good degradation effect on microplastics in water.

The invention discloses an indoxacarb nano red fire ant poison bait and a preparation method and application thereof, belonging to the technical field of red fire ant control. The indoxacarb nano red fire ant poison bait is composed of the following raw materials in mass percentage: 0.05% indoxacarb, 10% sweetener, 10% attractant, 10% adhesive, 1.32% to 2.15% nano carrier, 0.09% to 0.15% fatty acid, and 67.65% to 68.54% filler. The indoxacarb nano red fire ant poison bait provided by the invention has a good control effect on red fire ants, and has the advantages of fast effect, strong lasting effect, thorough control, and small amount of application, and the ingredients are stable, not easy to volatilize, safe and non-toxic, and the damage to the surrounding environment and animals and plants of the application is small, which meets the characteristics of green pesticides; the preparation method of the indoxacarb nano red fire ant poison bait provided is simple and easy to operate, does not require high temperature and high pressure, has low requirements on equipment, does not generate toxic and harmful substances, and is green and environmentally friendly.

The invention discloses a carbon dot corrosion inhibitor with excellent corrosion inhibition and tracing performance, a preparation method and application, and relates to the technical field of corrosion inhibition of metal materials. The technical problems that in the prior art, a carbon dot corrosion inhibitor is prone to aggregation and instability in a high-temperature and strong-acid environment, and application is single are solved. The method comprises the following steps: firstly, taking citric acid and propargyl-PEG2-amine as raw materials, and dissolving the raw materials in deionized water to obtain a mixed solution; the mixed solution is placed in a high-pressure reaction kettle to be subjected to a hydrothermal reaction, and citric acid carbon dots modified by propargyl-PEG2-amine are prepared; sequentially carrying out centrifugation, dialysis and freeze drying treatment on the citric acid carbon dots modified by the propargyl-PEG2-amine, so as to obtain the citric acid carbon dots modified by the propargyl-PEG2-amine. The prepared carbon dot corrosion inhibitor can be used as a corrosion inhibition material in a high-temperature-resistant strong-acid environment, and can also be used for in-situ monitoring of dichromate ions in industrial wastewater and in-situ monitoring of iron ions and ferrous ions in underground water, surface water and drinking water so as to judge whether the content of the iron ions and the ferrous ions exceeds the standard or not.

The present invention belongs to the technical field of methods for recovering triethylamine, and specifically relates to a method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride. The method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride of the present invention comprises the following steps: firstly, adding triethylamine aqueous solution to triethylamine hydrochloride raw material, keeping the solid content less than 30%, then adding liquid ammonia, reacting in a closed stirring manner, controlling the reaction temperature and reaction pressure, and cooling the reaction to room temperature after the reaction is completed to obtain a reaction mixture, and finally filtering to obtain crude ammonium chloride and triethylamine liquid, treating the crude ammonium chloride to obtain pure ammonium chloride, and drying the triethylamine liquid to obtain pure triethylamine. The present invention provides a method for recovering triethylamine hydrochloride to simultaneously prepare triethylamine and ammonium chloride, which has high reaction conversion rate, good economy, high yield and high purity of the two products.

This invention provides a Cu-supported Y molecular sieve catalyst, its preparation method and application, and a method for preparing dimethyl carbonate using carbon dioxide. The method for preparing dimethyl carbonate using carbon dioxide includes: reacting carbon dioxide and dimethyl ether in the presence of a copper-containing catalyst to produce dimethyl carbonate; the copper-containing catalyst includes a Y molecular sieve and copper supported on the Y molecular sieve. This invention uses a copper-supported Y molecular sieve to catalyze the reaction of dimethyl ether with carbon dioxide. The reaction conditions are mild, the reaction product contains only dimethyl carbonate, with no byproducts generated, achieving 100% atom economy. It utilizes the greenhouse gas CO2, reducing environmental pollution. Furthermore, since no water byproduct is generated in the reaction, the adverse effects of water on catalyst activity and dimethyl carbonate selectivity are effectively avoided, significantly improving the yield of dimethyl carbonate. The operation is simple, the process conditions are mild, reducing costs and improving industrial production efficiency.

The application discloses a method for preparing high-purity dihydrate gypsum from hemihydrate phosphogypsum in an organic acid system and belongs to the technical field of comprehensive utilization of phosphogypsum. The method comprises the following steps: preparing an organic acid solution and heating, mixing the organic acid solution with hemihydrate phosphogypsum dry base and water in proportion, performing a hydration recrystallization reaction at constant temperature, adding sulfuric acid of a proper concentration to modify the crystal, and finally filtering and washing the product, recycling the organic acid solution in a closed loop, drying the filter cake and obtaining high-purity dihydrate gypsum. The method can effectively break the impurity wrapping effect and deeply remove phosphorus and fluorine impurities, solves the problems of incomplete removal of phosphorus and fluorine impurities, high residual of insoluble impurities, low resource recovery rate and poor performance of finished products in the existing inorganic acid modification process, and significantly improves the purity of dihydrate gypsum and the recovery rate of phosphorus and fluorine, thereby realizing high-value and resource utilization of hemihydrate phosphogypsum.

This invention discloses a hydrogen-assisted rechargeable battery method for hydrogen storage and production, belonging to the field of hydrogen energy storage and electrochemical energy storage technology. The method includes four core steps: battery assembly, circulating electrolyte supply, charging for hydrogen storage, and discharging for hydrogen production. During charging, hydrogen-containing gas is introduced into the cathode, where a hydroxide reaction occurs, and metal ion reduction and deposition occur at the anode, storing hydrogen energy as a metallic element in a solid state under normal pressure. During discharging, a metal oxidation and dissolution reaction occurs at the anode, and a hydrogen evolution reaction occurs at the cathode, generating hydrogen gas in situ and releasing hydrogen energy on demand. This invention eliminates the oxygen evolution reaction of traditional water electrolysis, using hydroxide coupled with metal oxidation-reduction to achieve hydrogen energy storage and release. It offers high storage safety, low reaction overpotential, high energy efficiency, and good cycle reversibility, solving the problems of poor safety, high energy consumption, and low energy efficiency in existing hydrogen storage technologies. It can be widely applied to renewable energy hydrogen production, large-scale hydrogen energy storage, and distributed hydrogen energy supply scenarios.

The invention relates to the technical field of chemical synthesis, and particularly discloses a preparation method of electrolyte salt lithium difluoro (oxalato) borate for a lithium ion battery. The invention discloses a preparation method of lithium difluoro (oxalato) borate, which comprises the following steps: mixing oxalic acid, lithium fluoride, boric acid, lithium hydroxide, a boron trifluoride complex and an organic solvent, heating for reaction, and filtering to obtain a reaction solution; the reaction temperature is 50-120 DEG C, and the reaction time is 4-48 hours; carrying out vacuum concentration on the reaction liquid until white solids are separated out, cooling, adding a poor solvent, crystallizing and filtering to obtain a wet product; and performing vacuum drying to obtain a target product. The novel preparation method of lithium difluoro (oxalato) borate, provided by the invention, is simple, high in product conversion rate, free of generation of other impurities and environment-friendly.

The invention provides a synthesis method of alpoxivan, and belongs to the technical field of heterocyclic compounds. Bromophenyl dichloropyrimidine is used as a raw material, the bromophenyl dichloropyrimidine and excessive sulfonamide are firstly subjected to nucleophilic substitution to prepare sulfadiazine, then amino is protected by chloromethyl benzyl ether to form a sulfadiazine protector, the sulfadiazine protector and ethylene glycol react under the conditions of high temperature and strong alkali to form hydroxyethyl pyrimidine, and the hydroxyethyl pyrimidine is subjected to recrystallization to prepare the sulfadiazine. The preparation method comprises the following steps: reacting hydroxyethyl pyrimidine with 5-bromine-2-chloropyrimidine to generate an alpoxivan protection substance, and carrying out acidic hydrolysis on a chloromethyl benzyl protection group by the alpoxivan protection substance to prepare the alpoxivan. According to the invention, the problems of reaction activity and selectivity of sulfonamide and pyrimidine ring are solved, the whole reaction process is simple, the safety is high, and the product purity is high.

This invention discloses a process for the recovery and resource utilization of wastewater and waste gas generated during silver powder production. It effectively recovers and treats four types of wastewater generated during silver powder production: organic-free ammonium nitrate wastewater, organic-free sodium nitrate wastewater, sodium nitrate wastewater containing organic matter, and ammonium nitrate wastewater containing both organic matter and sodium nitrate. The invention effectively recovers and treats all four main types of wastewater and two types of waste gas generated during silver powder production, converting them all into the necessary production materials such as ammonia, concentrated nitric acid, dilute nitric acid, and sodium hydroxide, thus achieving complete recovery and utilization of all wastewater and waste gas.

The invention relates to a method for preparing high-purity silicon tetrafluoride by dissociating fluosilicate through low-temperature plasma. The method comprises the following steps: crushing fluosilicate in a crusher, and heating and dewatering in a vibrated fluidized bed; the treated fluosilicate powder is conveyed to a plasma reactor through carrier gas to be dissociated to generate silicon tetrafluoride; and finally, silicon tetrafluoride generated by reaction enters a first-stage condenser to separate solid metal fluoride, then enters a cold hydrazine to be cooled for first-stage impurity removal, and then enters an adsorption tower for second-stage impurity removal, so that high-purity silicon tetrafluoride is obtained. The fluosilicate is dissociated by adopting a low-temperature plasma technology, so that high-purity silicon tetrafluoride is efficiently prepared under a low-temperature condition; meanwhile, the one-step method is short in conversion process, fluorine-containing waste is not generated, a simple purification step is combined, the production cost and the environment-friendly burden are reduced, the raw material adaptability is high, and operation is easy.

This invention discloses a microwave-tunable composite ceramic material and its preparation method, belonging to the technical field of microwave ceramic materials. The material is composed of Ba... 1‑x Sr x It consists of three phases: TiO3, Li2Mg3TiO6, and Mg2SiO4, among which Ba 1‑x Sr x The mass percentage of TiO3 is 30%–95%, and the value of x ranges from 0.3 to 0.7; the mass percentage of Li2Mg3TiO6 is 3%–60%, with the remainder being Mg2SiO4. This material has a moderate dielectric constant, low dielectric loss, and high tuning efficiency, combining high performance with a low sintering temperature. It can be used in microwave devices such as phase shifters, tunable filters, delay lines, oscillators, resonators, and phased array antennas.

The invention discloses a hanger soaking and deplating agent and a preparation method thereof, the soaking and deplating agent comprises the following raw materials by weight percentage: 10-80% of an oxidizing agent, 1-25% of organic acid, 0.5-25% of a reducing agent, 1-25% of conductive salt, 0.5-25% of a complexing agent, 0.1-0.3% of a corrosion inhibitor, 0.1-0.5% of a surfactant, 0.05-0.2% of a defoaming agent, and the balance of water, and the sum of the raw materials is 100%. The oxidant is ferric trichloride, and the organic acid is sulfamic acid; the reducing agent is oxalic acid; the conductive salt is potassium chloride; the complexing agent is ammonium sulfate; the surfactant is fatty acid methyl ester ethoxylate sulfonate; the corrosion inhibitor is thiourea, and the defoaming agent is an organic silicon defoaming agent; the water is a solvent, specifically deionized water.

The application discloses application of a binary aluminum-based layered double metal oxide in degradation of polycyclic aromatic hydrocarbons at low temperature, and degrades polycyclic aromatic hydrocarbons in boiler flue gas in a range of 240-300 DEG C with the binary aluminum-based layered double metal oxide as a catalyst; the content of polycyclic aromatic hydrocarbons in the boiler flue gas is 30000h ‑1 -60000h ‑1 The chemical formula of the binary aluminum-based layered double metal oxide is: wherein M is one of Cu, Mn and Co. The application is aimed at the treatment difficulty of boiler flue gas with only low concentration of PAHs but needing rapid treatment, and a binary aluminum-based layered double metal oxide is designed based on the characteristics of LDOs, which is used for efficient degradation of polycyclic aromatic hydrocarbons at low temperature and has excellent PAHs deep degradation capacity.

The invention provides a spontaneous heating material and a preparation method and application thereof. The self-heating material comprises a positive electrode material layer and a negative electrode material layer, and the positive electrode material layer and the negative electrode material layer are attached to each other; the positive electrode material layer comprises a carbon-based material; the porosity of the negative electrode material layer is 20%-50%; and the negative electrode material layer comprises a porous metal material. The positive electrode material layer of the self-heating material contains the carbon-based material with the specific particle size, the positive electrode material layer and the negative electrode material layer are attached and make contact with the alkaline electrolyte, the alkaline electrolyte can penetrate through pores of the negative electrode material layer to make contact with the positive electrode material and the negative electrode material, and after contact, a short-circuit reaction of the metal-air battery occurs; therefore, heating is realized. The self-heating material has the advantages of being rapid in heating, controllable in temperature, long in heating time and the like.

The invention relates to a method for degrading organic pollutants in water by utilizing nitrilotriacetic acid and divalent manganese ion reinforced ferrate, aiming at solving the problems that the ferrate is relatively low in organic pollutant degradation efficiency, low in organic pollutant removal rate and the like in an actual wastewater treatment process. The invention discloses a method for degrading organic pollutants in water by utilizing nitrilotriacetic acid and divalent manganese ion reinforced ferrate. The method comprises the following steps: 1, adjusting the pH value of wastewater containing the organic pollutants to be 7-8; 2, placing nitrilotriacetic acid in pure water, and stirring to obtain a nitrilotriacetic acid stock solution; 3, adding the nitrilotriacetic acid stock solution into the wastewater; 4, adding manganese salt into the micro-complex pollutant wastewater; and 5, adding ferrate into the manganese-containing micro-complex pollutant wastewater, and carrying out stirring reaction to degrade organic pollutants in the water. According to the method disclosed by the invention, a combination of nitrilotriacetic acid and divalent manganese is introduced into a ferrate oxidation system, so that various pollutants in water can be effectively removed, and the removal rate of the pollutants in the water reaches 90% or above within 30 minutes.

The invention provides a preparation method of a lignin-based polyurethane slow-release nitrogen fertilizer, which comprises the following steps: separating and extracting lignosulfonate from papermaking industry waste black liquor by adopting a membrane filtration method, liquefying lignin, polyethylene glycol and ethylene glycol according to a certain proportion, introducing a hydrophobic group through hydroxyl-terminated polydimethylsiloxane, and preparing the lignin-based polyurethane slow-release nitrogen fertilizer. Reacting with castor oil and isophorone diisocyanate to prepare polyurethane, and coating and curing the polyurethane on the surfaces of urea particles in a rotating pot at a certain temperature and rotating speed to prepare the lignin-based polyurethane slow-release nitrogen fertilizer. The polyurethane is wide in raw material source, the preparation method is simple, the bio-based content is high, and the prepared slow-release nitrogen fertilizer is good in slow-release performance.

The application provides an external container inner wall cleaning structure and a cleaning method. The cleaning assembly is connected with the container. The cleaning assembly comprises: a laser light source, which is used for emitting a light beam. The emission frequency of the light beam of the laser light source is less than 1000 Hz. The energy of the light beam emitted by the laser light source ranges from 0.1 J to 100 J. A galvanometer component is used for receiving the light beam emitted by the laser light source and forming a cleaning light beam for cleaning the inner wall surface of the containing cavity. A wedge mirror assembly is arranged corresponding to the container port, so that the cleaning light beam enters the containing cavity after refraction through the wedge mirror assembly and irradiates on the inner wall surface of the containing cavity. A driving motor. The wedge mirror assembly is connected with the output shaft of the driving motor to drive the rotation of the wedge mirror assembly, so as to adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly. The external container inner wall cleaning structure and the cleaning method solve the technical problem that the related art is difficult to clean the inner wall of the container.

The invention discloses a method for synergistically preparing a high-calcium mineral organic water-soluble fertilizer and a citrate-soluble mineral fertilizer from shellfish solid waste and agriculture and forestry biomass. Through cooperation of multi-stage activation and catalysis, the conversion activity of calcium and the quality of humic acid are remarkably improved, the process route integration degree is high, and the technicality is high. The content of water-soluble calcium in the obtained product is more than or equal to 10%, the content of humic acid is more than or equal to 30%, medium trace elements are rich, quick-acting and long-acting fertility is achieved, crop growth can be remarkably promoted, the soil aggregate structure is improved, heavy metal is passivated, crop stress resistance is enhanced, and a new way is provided for high-added-value resource utilization of the two kinds of waste.

This invention discloses a method for preparing N,N,-di(β-hydroxypropyl)benzamide. Using excess methyl benzoate as a raw material, the amino groups are fully converted to obtain a mixture of N,N-di(β-hydroxypropyl)benzamide product and acyl ester byproducts. The acyl ester byproducts in the mixture are then alcoholyzed using an alcoholysis reagent to obtain the N,N-di(β-hydroxypropyl)benzamide product. This method improves reaction selectivity and product yield, achieving a maximum yield of up to 97%.

The application discloses a graphene / TA1 composite material and a preparation method thereof, and belongs to the technical field of graphene / titanium-based composite material preparation. In order to solve the problem of the rolled high-strength plastic graphene / TA1 composite material in a high-load service environment, Sn powder, Y2O3 powder and TA1 titanium alloy powder are uniformly mixed, then the mixture is added into a ball mill tank, graphene powder is added in batches, and multiple ball milling is carried out to obtain a composite powder; a mold filled with the composite powder is placed in a sintering furnace, an axial pressure is applied to the mold, and plasma sintering treatment is carried out to obtain a sintered composite material blank; the sintered composite material blank is subjected to oxidation scale removal and round billet cutting treatment, and then is subjected to sandpaper polishing to obtain a hot rolling initial sample; and multiple pass rolling is carried out until the total reduction is 75%, and then air cooling is carried out to room temperature to obtain the graphene / TA1 composite material. The application improves the overall properties of the high-strength plastic graphene / TA1 composite material.

This invention discloses a method for preparing pyridine carboxylic acids. The method involves the oxidation of alkyl pyridines with an oxygen-containing gas under cobalt-manganese solid catalyst catalysis to obtain pyridine carboxylic acids. The reaction is preferably carried out at a temperature of 150-170℃ and a pressure of 2.5-3.5 MPa, using a small-molecule organic acid as the solvent. The preparation method is simple, exhibits excellent production performance, operates under relatively mild conditions, and causes no environmental pollution or equipment corrosion during the process, demonstrating significant industrial application prospects and value.

The invention discloses a clean production method of bio-based valerolactam. The monomer valerolactam is prepared by taking bio-based cyclopentanone as a raw material through two-step reaction of ammoximation and Beckmann rearrangement. The method mainly comprises the following steps: 1) mixing raw materials, namely cyclopentanone, ammonia water and hydrogen peroxide, and reacting under the action of a catalyst to generate cyclopentanone oxime; 2) recycling the catalyst through solid-liquid separation, and distilling a reaction liquid phase to obtain a high-purity intermediate product cyclopentanone oxime; 3) gasifying the cyclopentanone oxime, feeding the gasified cyclopentanone oxime into a rearrangement reactor filled with an all-silicon molecular sieve, and carrying out catalytic rearrangement reaction on the cyclopentanone oxime to generate valerolactam; and 4) carrying out heat exchange condensation and rectification purification on the gas-phase material flow from the rearrangement reactor to obtain the polymer-grade valerolactam monomer. The method is high in conversion rate in each step, high in selectivity and good in atom economy, valerolactam is prepared from cyclopentanone in a high-selectivity manner, ammonium sulfate as a byproduct is avoided, meanwhile, no waste acid or waste salt is generated, and the method is a clean industrial production method of the valerolactam monomer.

The application provides a blast furnace gas purification control method and a furnace top water injection system. The method comprises the following steps: obtaining a current average temperature of blast furnace gas in a target area; determining whether to trigger a spraying request based on the current average temperature and a preset spraying start temperature; in response to the current triggered spraying request, controlling a spray gun to spray cooling liquid according to preset working parameters according to the current average temperature and a plurality of calibration temperature ranges; when the average temperature of the cooled blast furnace gas is less than a preset spraying stop temperature, stopping the spraying of the spray gun, and outputting blast furnace gas containing ammonium chloride; wherein the preset spraying stop temperature represents the crystallization temperature of ammonium chloride generated by the reaction of ammonia gas and hydrogen chloride in the blast furnace gas. Through the method provided by the application, the problems of device blockage, hydrolysis agent deactivation and pipeline corrosion in the dry desulfurization system caused by chlorine-containing impurities are solved.

The application belongs to the technical field of biocatalytic synthesis of steroid drugs, and particularly relates to a dehydrogenase, a gene, an engineering bacterium and application, the amino acid sequence of the dehydrogenase is SEQ ID NO. 1 or SEQ ID NO. 2, the dehydrogenase has high dehydrogenation activity, high stereoselectivity and strong regioselectivity, and no other conformation impurities are generated; the engineering bacterium can efficiently secrete the dehydrogenase, and effectively improves the conversion efficiency of a substrate, especially for a substrate 6-methy format (11beta, 17alpha-dihydroxy-6alpha-methylpregna-1, 4-diene-3, 20-diketone), which is low in cost and has significant industrialization potential; the dehydrogenase mutant has clear physicochemical properties, and the method of whole cell catalysis is used, so that the cumbersome step of enzyme purification is omitted, and the cost is reduced and the operation is simple.