317 results about "Aluminum nitrate" patented technology

The invention belongs to the technical field of rare earth functional materials, and particularly relates to a rare earth aluminate low-temperature magnetic refrigeration material and a preparation method and application thereof.The preparation method comprises the following steps that 1, rare earth metal nitrate and aluminum nitrate are added into water to be mixed, and a mixed solution is prepared; adding ammonia water into the mixed solution to prepare a precipitate; (2) carrying out annealing treatment on the precipitate to prepare a metal oxide; and (3) calcining the metal oxide to obtain the rare earth aluminate low-temperature magnetic refrigeration material. The rare earth aluminate which has the characteristics of stable structure, low preparation cost, strong mechanical property, high magnetic density and the like and is prepared by adopting a coprecipitation method and combining a high-temperature sintering technology has more excellent magnetocaloric properties in a low-temperature region.

The invention discloses a high-stability layered oxide sodium-ion battery positive electrode material and a preparation method thereof.The high-stability layered oxide sodium-ion battery positive electrode material comprises a layered oxide matrix and a surface coating layer, a sodium source, a nickel source, a manganese source, a lithium source and a magnesium source are mixed according to the stoichiometric ratio, a pre-sintered product is heated to 850-950 DEG C at the speed of 0.5-2 DEG C / min to be calcined, and the high-stability layered oxide sodium-ion battery positive electrode material is obtained. The calcined product, lithium phosphate and aluminum nitrate are subjected to ball milling and mixing in a citric acid solution with the pH value of 3-5 according to the mass ratio of 1: (0.005-0.03): (0.002-0.02), and the capacity retention ratio of the battery is larger than or equal to 88% after 500 times of circulation under the voltage range of 2.0-4.0 V and the multiplying power of 0.5 C. The comprehensive protection from the bulk phase to the interface is realized by triple doping and gradient coating, and the cycle life is prolonged by two times. Interlayer spacing expansion and coating layer ion conduction cooperate to reduce polarization, and the applicable temperature range is widened to-30 DEG C to 60 DEG C. Seed crystal induction and segmented sintering ensure batch consistency, and the method is suitable for large-scale production. Cheap Fe / Mn is adopted to replace part of Ni, and the material cost is reduced by 40% compared with similar products.

The invention provides titanium-containing anhydrous stemming for a blast furnace and a preparation method of the titanium-containing anhydrous stemming, and belongs to the technical field of refractory materials for the blast furnace. The titanium-containing anhydrous stemming for the blast furnace comprises the following raw materials: 40-60 parts of titanium corundum, 5-15 parts of silicon carbide, 10-20 parts of ferro-silicon nitride fine powder, 5-15 parts of titanium dioxide fine powder, 5-15 parts of vanadium-titanium slag fine powder, 5-10 parts of coke fine powder, 1-5 parts of monatomic silicon fine powder, 1-5 parts of ball clay micro powder, 1-5 parts of aluminum nitrate micro powder and 1-2 parts of magnesium alon micro powder. Gas-phase substances of Si (g), Al (g) and Mg (g) can be formed in the stemming at high temperature by the monatomic silicon fine powder and the MgAlON micro powder in the raw materials and react with CO and N2 in the environment to generate ceramic whiskers such as SiC, Si3N4, AlN and MgAl2O4, and the generated ceramic whiskers are distributed in a staggered manner and are filled in pores of the stemming, so that the high-temperature strength and the volume stability of the stemming are remarkably improved.

The invention provides eutectic aqueous aluminum ion battery electrolyte as well as a preparation method and application thereof, and relates to the technical field of aluminum ion batteries. According to the invention, the eutectic aqueous aluminum ion battery electrolyte is prepared by solid-solid mixing and dissolving of aluminum metal salt and eutectic substances; the aluminum metal salt is selected from at least one of aluminum chloride hexahydrate, aluminum perchlorate nonahydrate, aluminum nitrate nonahydrate and aluminum sulfate octadecahydrate; the eutectic substance is an organic small molecule compound containing amino and ester groups. By screening hydrated aluminum metal salt and eutecticevaporate substances and regulating and controlling the proportion, the prepared electrolyte is applied to aqueous aluminum ion batteries, such as symmetrical batteries and total batteries, and shows excellent performance. According to the electrolyte, the stability of the aluminum ion battery can be improved, a solvation structure dominated by anions is formed, and meanwhile, a compact anion-rich solid electrolyte interface layer is formed on the surface of an aluminum negative electrode to protect the aluminum negative electrode. The problem that an existing water-based aluminum ion battery negative electrode is poor in stability is solved.

The invention discloses a silicon / graphite / carbon-aluminum oxide composite negative electrode material and a green preparation method thereof, and belongs to the technical field of lithium ion batteries. Aiming at the problems of high volume expansion rate and poor cycling stability of a silicon-based negative electrode and high cost of a traditional process, the invention innovatively provides the following scheme: 1) waste photovoltaic silicon wafer ball-milling liquid and waste graphite are taken as core raw materials, and resource recycling is realized; (2) phenolic resin and chitosan are adopted as double carbon sources, a nitrogen-doped carbon layer (the nitrogen content is 3-5 wt.%) is formed through pH-induced self-assembly, and the conductivity and the Li < + > diffusion rate are synchronously improved; and 3) aluminum nitrate is introduced for pyrolysis to generate 2-5nm aluminum oxide for doping, so that the side reaction of the electrolyte is inhibited, and the volume expansion of silicon is relieved (the expansion rate is less than or equal to 120%). The preparation process comprises the steps of silicon / graphite dispersion, double-carbon-source compounding, ammonia water regulation and control precipitation and gradient calcination. Experiments show that the specific capacity of the optimized material under the current of 0.5 A / g reaches more than 800mAh / g, the 100-time cycle capacity retention ratio is more than 98%, the 1000-time cycle capacity retention ratio is more than 80%, the reversible specific capacity under the multiplying power of 3A / g is more than 550mAh / g, and the raw material cost is reduced by 40%. The invention has the advantages of high capacity, long service life, environmental protection and economy, and provides an innovative solution for the fields of power batteries and energy storage.

The invention relates to the technical field of agriculture, in particular to a plant nutrient solution for saline-alkali soil improvement and a preparation method thereof. The invention relates to a preparation method of a plant nutrient solution for improving saline-alkali soil. The preparation method comprises the following steps: preparing NO3-intercalated layered double hydroxides and acid modified calcium-based montmorillonite; preparing humic acid chelated calcium magnesium powder; preparing a binary compound; and preparing the plant nutrient solution. The preparation method comprises the following steps: preparing NO3-intercalated layered double hydroxides from calcium nitrate tetrahydrate and aluminum nitrate nonahydrate, carrying out acid modification on calcium-based montmorillonite by using dilute sulphuric acid, purifying humic acid, and mixing with calcium chloride and magnesium chloride hexahydrate to prepare humic acid chelated calcium magnesium powder. Finally, the three components are added into pig excrement fermentation liquor to prepare a plant nutrient solution, an adsorption-replacement-leaching closed loop can be formed, the desalination and alkali reduction efficiency is remarkably improved, the soil structure is improved, the effect of synergistically improving the saline-alkali soil is achieved, and therefore plant growth is promoted.

A ceramic susceptor particularly with excellent volumetric resistance at high temperatures and thermal conductivity at room temperature compared to a typical ceramic susceptor and a method for manufacturing the same are disclosed. The ceramic susceptor is characterized by comprising alumina (Al2O3); and aluminum nitride (AlN), and not comprising a secondary phase including an aluminum oxynitride phase (AlON phase).

The invention provides a vanadium aluminum phosphate electrode material and a preparation method thereof. In target product components, an aluminum source, a vanadium source and a phosphorus source are respectively aluminum nitrate or other aluminum sources, vanadium pentoxide or ammonium vanadate, ammonium dihydrogen phosphate, phosphoric acid or other phosphorus sources, and a nitrogen source of nitrogen-doped carbon is from polyvinylpyrrolidone or other nitrogen sources of a gel component; the carbon source is selected from polyvinyl alcohol and glycerol. By adopting an exogenous plasticizing physical crosslinking sol-gel method, in the whole reaction system, uniform distribution of reaction ions and intermediates is maintained, and finally, gel is networked, so that the problem of capacity fading caused by an unstable structure of an existing aluminum ion battery positive electrode material in a circulating process is solved, and the service life of the aluminum ion battery positive electrode material is prolonged. And the problems of high reaction system selection requirement, long preparation period and complex process of the existing endogenous covalent polycondensation sol-gel method for preparing the electrode material are solved.

The invention discloses a high-adhesion solid-state capacitor carbon foil production process, and relates to the technical field of solid-state capacitor carbon foils. The preparation method comprises the following steps: generating a three-dimensional graphene layer in situ on the surface of an aluminum foil by a chemical vapor reduction method; secondly, the graphene layer is modified by utilizing aluminum nitrate ammonium nitrate, and then the Ni-Al layer with a continuous lamellar structure is prepared on the graphene layer through electrochemical deposition, so that active sites are provided, and the ion diffusion capability of the carbon foil is remarkably improved; finally, mixing ethylene diamine tetraacetic acid dipotassium salt and corn starch to prepare nitrogen-doped carbon aerogel, preparing the nitrogen-doped carbon aerogel into powder, and coating the surface of the Ni-Al layer with the powder to prepare a four-layer composite carbon foil; by doping nitrogen atoms, the surface chemical performance of the carbon aerogel material can be changed, the wettability of an electrode is improved, the diffusion rate of electrolyte ions is increased, and the specific capacity of the material is increased, so that the overall electrochemical performance of the carbon foil is improved. The four-layer composite carbon foil prepared by the invention has the effects of high adhesion and excellent electrochemical performance.

The invention relates to the field of lithium manganate positive electrode materials, in particular to a lithium manganate positive electrode material and a preparation method thereof, a positive electrode plate and a battery, which are used for solving the problems of Jahn-Teller distortion of Mn < 3 + >, Mn dissolution and low conductivity in circulation. Lithium carbonate, manganous-manganic oxide, potassium carbonate, aluminum nitrate and absolute ethyl alcohol are subjected to ball milling and then sintered to obtain K / Al co-doped lithium manganate powder, then the K / Al co-doped lithium manganate powder is coated with an acetylferrocene / diphenylamine polymer, finally, the K / Al co-doped lithium manganate powder is coated with an AlF3 (at) CeF3 suspension, and finally the lithium manganate positive electrode material is obtained. According to the lithium manganate positive electrode material, the electronic conductivity is greatly improved, the rate capability is improved, and the cycling stability is improved; and the material has excellent cycling stability and rate capability.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention relates to the technical field of precious metal detection, in particular to a molybdenum detection reagent, a preparation method and a use method thereof, and the molybdenum detection reagent comprises 20%-38% of hydrochloric acid, 20%-27% of nitrate and water. The 316 stainless steel and the 2205 stainless steel both contain more than 2% of molybdenum, the 316 stainless steel and the 2205 stainless steel can be distinguished through magnetism, and the 2205 stainless steel has strong magnetism. The molybdenum detection reagent can be used for detecting molybdenum ions in stainless steel so as to distinguish 316 stainless steel from 304 stainless steel. The nitrate can make the 316 stainless steel and the 304 stainless steel show different colors, so that the 316 stainless steel and the 304 stainless steel can be accurately distinguished. The reagent of the magnesium nitrate can make the reagent on the 316 stainless steel yellow, the reagent of the aluminum nitrate can make the reagent on the 316 stainless steel light yellow, and the reagent of the ferric nitrate can make the reagent on the 316 stainless steel brown. The molybdenum detection reagent can accurately and rapidly detect and identify 316 stainless steel, and is low in cost, convenient to operate and convenient to carry.

The invention discloses a sensing material for detecting atmospheric carboxylic acid, a preparation method, a detection method and application, belongs to the technical field of environmental functional materials, and solves the problems that an existing method is complex in operation and cannot realize real-time online monitoring, the sensing material for detecting atmospheric carboxylic acid is an MOF-802-EDTA-Pt composite film, and the preparation method comprises the following steps: taking 1, 3, 4, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5- The preparation method comprises the following steps: synthesizing an MOF-802 material through a hydrothermal reaction by taking 1, 3, 5-benzene tricarbonic acid (BTC) and aluminum nitrate as raw materials and ethylene diamine tetraacetic acid (Na-EDTA) as a ligand; the preparation method comprises the following steps: dispersing MOF-802 in DMF to form a coating solution, and forming a film on a glass substrate through a pulling method; and then loading platinum nanoparticles, and carrying out solvothermal reaction and vacuum drying to obtain the composite sensing film. The MOF-802-EDTA-Pt composite film has a porous structure and fluorescence characteristics, and detection is realized through a fluorescence quenching effect of carboxylic acid molecules and an MOF skeleton. The method disclosed by the invention is controllable in process and high in material stability, still keeps excellent selectivity under the coexistence condition of interferents such as CO2 and NO2, and is suitable for real-time monitoring of carboxylic acid pollutants in the atmospheric environment.

The invention provides a catalyst for methane and carbon dioxide dry reforming reaction as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation. The catalyst for the methane and carbon dioxide dry reforming reaction is prepared by the following steps: taking boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate as raw materials, dissolving the raw materials in water, and stirring until the raw materials are clear and transparent to obtain a mixed solution; adding an ammonia water solution into the mixed solution and stirring to obtain a precipitate mixture; placing the precipitate mixture in a hydrothermal reactor for hydrothermal reaction, and obtaining a catalyst precursor after the hydrothermal reaction is finished; filtering, washing and drying the catalyst precursor to obtain a dried product; and the dried product is calcined and cooled, and the Ni-B / MgAl2O4 catalyst is obtained. The catalyst prepared by the method provided by the invention can overcome inactivation caused by easy generation of carbon deposition in the existing Ni catalyst, and provides high methane and carbon dioxide dry reforming reaction activity and stability at the same time.

The invention provides a functional filler, a preparation method thereof, an inorganic thermal control coating and application, and belongs to the technical field of coatings. The preparation method of the functional filler comprises the following steps: by taking a zinc acetate aqueous solution as a raw material, adding indium nitrate and aluminum nitrate, stirring and dissolving, then sequentially adding a complexing agent and a stabilizer, heating in a water bath to form transparent gel, and finally sintering at high temperature. According to the preparation method, a sol-gel method and a high-temperature sintering process are adopted to dope an indium element and an aluminum element into zinc oxide to prepare indium-aluminum co-doped zinc oxide, and then the indium-aluminum co-doped zinc oxide is used as a functional filler to be added into inorganic silicate resin to prepare the inorganic thermal control coating. The aluminum element and the indium element can synergistically act to improve the temperature resistance of the coating, so that the inorganic silicate coating with protection and thermal control effects is obtained, can be used on the surface of a spacecraft and has good thermal control and temperature resistance effects.

The invention relates to the technical field of preparation methods of nano precursor powder, in particular to a synthesis method of Cr < 3 + > doped magnesium aluminum oxide nano powder, which comprises the following steps: weighing magnesium nitrate, aluminum nitrate and chromic nitrate according to the stoichiometric ratio of MgAl2-xO4: xCr < 3 + >; stirring and mixing the prepared magnesium nitrate solution, aluminum nitrate solution and chromic nitrate solution together to prepare a mixed solution I; ammonia water is dripped into the first mixed solution, then the first mixed solution dripped with the ammonia water is stirred and mixed, and a second mixed solution is prepared; pouring the mixed solution II into a high-pressure reaction kettle, and putting the high-pressure reaction kettle into a constant-temperature box for reaction to prepare a white precipitate; adding deionized water into the white precipitate for washing and precipitating, and centrifuging to obtain white precipitate powder; drying the white precipitate powder at a constant temperature; calcining the dried white precipitate powder to prepare nano precursor powder; the prepared nanometer precursor powder has the advantages of being high in purity and small in particle size.

The invention provides an aluminum-doped NiCoCe catalyst, a preparation method thereof and application of the aluminum-doped NiCoCe catalyst in low-temperature CO2 hydrogenation methane preparation reaction, the preparation method comprises the following steps: (1) dissolving nickel nitrate, cobalt nitrate, cerium nitrate, aluminum nitrate and an alkaline precipitator in deionized water, and fully stirring the solution at room temperature to obtain a solution A; (2) putting the solution A into a reaction kettle, and crystallizing the mother liquid at a constant temperature for a certain time to obtain a solid-liquid mixture B; (3) centrifuging and washing the solid-liquid mixture B in the step (2) to obtain a precipitate C; (4) drying the precipitate C in the step (3) to obtain a precursor D; and (5) reducing and passivating the precursor D in the step (4) to obtain the catalyst. The catalyst prepared by the invention effectively solves the problem of low CO2 conversion rate in low-temperature CO2 methanation reaction, lattice distortion is promoted by introducing the Al element, the migration ability of lattice oxygen is increased, and the formation of a large number of oxygen vacancies is beneficial to improving the oxidation-reduction property of the catalyst.

The invention belongs to the field of electro-catalysis, and particularly discloses preparation and application of an efficient self-supporting bifunctional electrolytic alkaline seawater catalyst.The catalyst is of a self-supporting stable structure formed by loading FeOOH-NiAl-LDH of a nano-sheet structure on a foamed nickel framework, and the preparation method comprises the following steps that 1, a hydrothermal growth method is adopted, foamed nickel serves as a substrate, and the self-supporting stable structure is formed; the preparation method comprises the following steps: weighing nickel nitrate hexahydrate, aluminum nitrate nonahydrate and urea, dispersing in deionized water, uniformly stirring, transferring into a reaction kettle, keeping at 100-120 DEG C for 10-12 hours, naturally cooling, washing and drying; and (2) adopting a room-temperature dipping etching method, taking flaky sodium hydroxide, dissolving the flaky sodium hydroxide in deionized water, fully dissolving, adding potassium ferrate to form a purple-red FeOOH colloid, putting the NiAl-LDH electrode prepared in the step (1) into the colloid, and dipping and etching at the room temperature of 25 DEG C for 12-24 hours to obtain the FeOOH-NiAl-LDH electrode. The scheme is mainly used for preparing the electrolytic seawater catalyst, and the problem that a traditional self-supporting electrolytic alkaline seawater catalyst is unstable in structure is solved.

The invention relates to nylon with excellent heat-conducting property and a preparation method, and belongs to the technical field of nylon materials. The nylon comprises nylon resin, a modified heat-conducting filler, a compatilizer, an antioxidant and a lubricant. The preparation method of the modified heat-conducting filler comprises the following steps: putting a mixed material into water, stirring, performing ultrasonic dispersion, adding aluminum nitrate hexahydrate, heating, purifying, and drying to obtain a composite filler; stirring and dispersing the composite filler and ethanol, adding a silane coupling agent, stirring, purifying and drying to obtain an intermediate; and stirring and mixing the intermediate and ethanol, adding styrene, a monomer and an initiator, heating and stirring, purifying, and drying to obtain the product. The nylon resin is adopted as a matrix, boron nitride, aluminum oxide and graphene nanosheets are combined and organically modified, and maleic anhydride grafted polypropylene is used as a compatilizer, so that the heat-conducting property and the comprehensive mechanical property of the nylon tube are effectively improved.

The invention discloses a preparation method and application of a hydrotalcite-like compound derivative magnesium-aluminum composite oxide with a coral spherical structure, magnesium nitrate is taken as a magnesium source, aluminum nitrate is taken as an aluminum source, a proper amount of citric acid and urea are introduced, and under the thermal action of an alcohol-water mixed solvent, a citric acid intercalated hydrotalcite-like compound is obtained in one pot; and further roasting to obtain the derived magnesium-aluminum composite oxide. The magnesium-aluminum composite oxide has a unique coral spherical structure, is endowed with a large specific surface area and a developed pore structure, contains rich alkalescence and moderately strong alkaline sites and oxygen vacancies, shows excellent activity and stability in a high-concentration COS system, and is suitable for being used as a catalyst for a COS hydrolysis reaction.

The invention belongs to the field of ferrite materials, and particularly relates to a high-coercivity strontium ferrite with iron partially replaced by aluminum and a preparation method of the high-coercivity strontium ferrite. Aiming at the problem of low coercive force of a ferrite pre-sintering material in the prior art, iron is partially replaced by aluminum, ferric nitrate, strontium nitrate, aluminum nitrate and glucose are used as reaction raw materials, the ratio of the total molar weight of Fe and Al to the molar weight of Sr is (9.5-12): 1, the ratio of the molar weight of Al to the total molar weight of Fe and Al is (0-0.41): 1, and the molar weight of glucose is 0.5-3.5 times of the total molar weight of Fe, Al and Sr; and calcining at 900-1200 DEG C for 1-3 hours by adopting a solution self-combustion-aluminum ion substitution method to prepare the strontium permanent magnetic ferrite powder material with high coercivity.

The invention belongs to the field of coal chemical industry purification, and particularly relates to an ultrahigh-precision conversion absorption type dechlorination purifying agent and a preparation method thereof. Wherein the dechlorination purifying agent is prepared from the following components in percentage by weight: 5%-30% of Fe2O3, 1%-10% of CuO, 10%-30% of ZrO2, 20%-40% of Al2O3, 10%-20% of ZnO and the balance of auxiliaries. The preparation method comprises the following steps: preparing ferric nitrate, copper nitrate, zirconium nitrate, aluminum nitrate and zinc nitrate into a solution, carrying out co-precipitation by using alkali liquor as a precipitator, washing, drying and calcining the obtained material to obtain a precursor, dipping the precursor powder with ammonium dihydrogen phosphate or phosphoric acid, drying and calcining, and carrying out compression molding. The dechlorination purifying agent can reduce the total amount of organic chlorine and inorganic chlorine in raw gas such as raw coke oven gas, coke oven gas, natural gas and gaseous hydrocarbon to 0.01 ppm or below, has the capacity of converting and absorbing organic chlorine, and meanwhile has extremely high dechlorination precision.

The invention discloses a high-ammonia-nitrogen wastewater treatment process, and belongs to the technical field of pyridine wastewater treatment, and the high-ammonia-nitrogen wastewater treatment process comprises the following steps: preparing hydrotalcite: weighing cobalt nitrate, magnesium nitrate and aluminum nitrate, adding distilled water, and stirring to obtain a salt solution; weighing sodium hydroxide and anhydrous sodium carbonate, adding distilled water, and stirring to obtain alkali liquor; pumping the salt solution and the alkali solution into a round-bottom flask, and heating and dispersing the round-bottom flask on an oil bath pan; putting the ground sample into a ceramic crucible, calcining in a muffle furnace, weighing a silver-ammonia solution and acetaldehyde, and pouring into a round-bottom flask; the pyridine wastewater is weighed, the hydrotalcite is added, stirring adsorption is performed for 20 min, the hydrogen peroxide is added, suction filtration is performed after the reaction, and the hydrotalcite is filtered and separated out for recycling. The problem that existing wastewater treatment is difficult is solved. The method has the advantages of high catalytic activity, easiness in recovery and reutilization of hydrotalcite, no need of adding any auxiliary chemical reagent, mild reaction conditions, low cost and convenience in operation, and can meet the requirements of industrial production.

The invention relates to a controlled-release solid corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of scale inhibition materials for water treatment. According to the preparation method of the controllably released solid corrosion and scale inhibitor, three metal salts (manganese nitrate, zinc nitrate and aluminum nitrate) are used as precursors, xanthan gum is used as a modifier, and a Mn-Zn-Al ternary modified hydrotalcite-like material is prepared through a hydrothermal reaction; further mixing, granulating and sieving the ternary modified hydrotalcite-like material and the scale and corrosion inhibition active component to prepare solid corrosion and scale inhibitors with different sizes. The solid corrosion and scale inhibitor provided by the invention can reduce the formation of scale and effectively delay the corrosion of metal, has a lasting action period, can realize the controlled release effect of the scale and corrosion inhibition active components, is beneficial to improving the utilization rate of water resources and reducing the use amount of water treatment aids, and has the advantages of environmental protection, environmental protection and the like. Meanwhile, the scale inhibitor has a good application prospect and development potential in development and application of the scale inhibitor for water treatment.

The invention belongs to the technical field of octafluorocyclopentene gas preparation, and particularly relates to a catalytic synthesis method of octafluorocyclopentene. The method specifically comprises the following step: under the action of a fluorine-chlorine catalyst, carrying out gas-phase catalytic fluorination reaction on 1-chloroheptafluorocyclopentene and anhydrous hydrogen fluoride at 80-120 DEG C to obtain octafluorocyclopentene. The preparation method of the fluorine-chlorine catalyst comprises the following steps: dissolving metal chloride in water, adding a precipitant, and fully stirring for reaction to obtain slurry; filtering the slurry to remove filtrate to obtain a solid, and washing the solid with deionized water until the solid is neutral; adding aluminum nitrate into the washed solid, fully stirring and drying to obtain a precursor of the catalyst; and performing compression molding on the precursor of the catalyst, roasting, and activating to obtain the fluorine-chlorine catalyst. The method is mild in reaction condition and high in catalytic efficiency.

The invention discloses a Mo in-situ doped transition metal layered double hydroxide derivative catalyst. The Mo in-situ doped transition metal layered double hydroxide derivative catalyst is of a nanometer two-dimensional layered structure; nitrate, aluminum nitrate and molybdate are used as raw materials, and a series of nano flaky Mo-X / Al2O3 composite metal oxide catalysts with high activity, high selectivity and high stability are obtained through co-hydrothermal precipitation and one-step roasting reduction. The invention further discloses a preparation method and application of the Mo in-situ doped transition metal layered double hydroxide derivative catalyst. According to the invention, macromolecules in biomass or biomass waste can be effectively depolymerized and liquefied into high-calorific-value bio-oil, so that the effect of turning waste into wealth from oriented conversion of the waste into bio-fuel is realized, and meanwhile, the bidirectional positive effects of avoiding environmental pollution caused by direct emission of the biomass waste and realizing comprehensive utilization of resources are realized; and a path with more economic benefits is provided for conversion from biomass wastes to renewable energy sources.

The invention provides porous alumina ceramic and a preparation method thereof, and relates to the technical field of ceramic materials. The invention relates to a preparation method of porous alumina ceramic. The preparation method comprises the following steps: dispersing alpha-cellulose powder in deionized water to form a cellulose suspension; stirring to fully swell the cellulose and form uniform gel, and freeze-drying to obtain a template; dissolving aluminum nitrate hexahydrate, magnesium nitrate hexahydrate and yttrium nitrate hexahydrate in absolute ethyl alcohol to obtain a precursor solution; putting gamma-Al2O3 micro powder and ammonium fluoride into a ball milling tank, adding the precursor solution and a dispersing agent, adding zirconium oxide balls and absolute ethyl alcohol into the ball milling tank, and performing ball milling to obtain ceramic slurry; dipping a template into the ceramic slurry, and performing dipping treatment under a vacuum condition to form a composite green body; and sintering to obtain the porous alumina ceramic. According to the porous aluminum oxide ceramic, the process stability is improved, and the problem that the strength is sharply reduced when the porosity is too high is solved.

The invention relates to a part and an electrophoretic coating process and application thereof, and belongs to the technical field of electrophoretic coating. The zirconium treatment liquid provided by the invention comprises hexafluorozirconic acid, aluminum nitrate, nitric acid, hydrogen fluoride and sodium nitrite; wherein aluminum nitrate can reduce the concentration of free fluorine in the treating fluid and promote hydrolysis of hexafluorozirconic acid, so that the generation speed of a zirconium film is increased; and the sodium nitrite can prevent the part base material from rusting, so that the anti-rust treatment after zirconium treatment is omitted. A part only needs to be subjected to zirconium treatment in the zirconium treatment liquid for 120 s, a zirconium film with the film weight being 48 mg / m < 2 > can be obtained, anti-dry spraying or anti-rust agent spraying does not need to be carried out after zirconium treatment to prevent the part from being rusted, and compared with the prior art, the efficiency of the electrophoretic coating process is improved; the parts subjected to electrophoretic coating are still free of corrosion after being subjected to a salt spray test for 1000 hours, and compared with the prior art, the performance is greatly improved.