607 results about "Ferrous sulphate" patented technology

The invention discloses a chitosan modified lithium iron phosphate and carbon composite positive electrode material and a preparation method thereof.The preparation method comprises the steps that 1, lithium hydroxide, phosphoric acid and ferrous sulfate heptahydrate are mixed to prepare a uniform and stable solution, and a lithium iron phosphate precursor is prepared through a solvothermal method; step 2, dissolving chitosan in an acetic acid aqueous solution, and magnetically stirring under a water bath condition until the chitosan is completely dissolved to prepare a chitosan solution; and 3, adding the lithium iron phosphate precursor into a chitosan solution, uniformly mixing, carrying out ball milling and freeze drying, and carrying out high-temperature carbonization treatment in an inert gas to obtain the chitosan modified lithium iron phosphate and carbon composite positive electrode material. The method is simple to operate, low in cost and uniform in product particle size distribution.

The invention relates to the technical field of water treatment agent preparation and environmental governance material processing, in particular to polymeric ferric sulfate and a preparation method thereof.The preparation method comprises the steps that steam condensation recycled water of a thermal power plant of an aluminum factory is mixed with ferrous sulfate and concentrated sulfuric acid to form a reaction solution, oxygen is introduced for an oxidative polymerization reaction, and a liquid intermediate is generated; gradient cooling is carried out on the liquid intermediate to control the molar ratio of ferric ions to hydroxyl, and a porous solid precursor is formed through concentration and closed aging; crushing the precursor, performing graded drying by adopting a rotary kiln and flash drying, and synchronously spraying a hydrophobic modifier to reduce the surface hydroxyl activity; the powdery product is secondarily dried in a nitrogen inert environment, and moisture absorption and agglomeration are inhibited. The invention solves the problems of mixed crystal forms, delayed release of effective components and secondary pollution in the traditional process. The obtained product is uniform in crystal form, concentrated in particle size distribution, remarkably improved in dissolution rate and storage stability, and suitable for black and odorous water body treatment and industrial sewage treatment.

The invention provides a dump leaching method for improving the leaching rate of gold ore, and belongs to the technical field of mineral processing. The method comprises the following steps: firstly, separating minerals into oversize products and undersize products; mixing sodium carboxymethyl cellulose, bentonite and ferrous sulfate to obtain a mixture, and granulating the undersize product by using the mixture as a binder; and mixing the undersize product particles with the oversize product, and carrying out cyanide-free dump leaching. According to the method, through graded granulation and heap building, the problem that heap building permeability is poor due to the fact that the gold ore contains many clay minerals is solved. In the granulation stage, ferrous hydroxide colloid generated by hydrolysis of ferrous sulfate in the binder can assist ore particle agglomeration, and particle stability is enhanced; during subsequent cyanide-free dump leaching, ferrous sulfate can be used as an auxiliary reducing agent and a catalyst in a thiourea gold leaching system to promote oxidation and dissolution of gold; meanwhile, ferrous ions can adjust the oxidation-reduction potential of a system, so that the thiourea gold leaching reaction is in a more favorable potential interval, the oxidation efficiency of thiourea is improved, invalid decomposition of thiourea is reduced, and therefore the use amount of thiourea and the use amount of agents are reduced.

The invention discloses a fermentation medium for regulating and controlling a clostridium aerovorans target product and a fermentation method of the clostridium aerovorans target product. The medium comprises a basic component and a regulating component, the basic components comprise ammonium chloride, potassium chloride, magnesium sulfate heptahydrate, sodium chloride, monopotassium phosphate, yeast powder, calcium chloride dihydrate, sodium selenite, nickel chloride hexahydrate, biotin, folic acid, pyridoxine hydrochloride, thiamine, riboflavin, nicotinic acid, D-calcium pantothenate, cobalamin, para aminobenzoic acid and lipoic acid; the adjusting component comprises sodium tungstate, ferrous sulfate and sodium molybdate, sodium tungstate and ferrous sulfate have a forward adjusting effect on increasing the yield of acetic acid, ethanol and butanol in the target product, and sodium molybdate has a reverse adjusting effect on the target product. By optimizing the proportion of trace elements in the culture medium, the clostridium metabolism efficiency is improved, synthesis of a target product is regulated and controlled, and the method is particularly suitable for industrial production of acetic acid, ethanol, butanol and the like.

The invention relates to a special fertilizer suitable for saline-alkali soil and a preparation method thereof. The fertilizer is granular and has a multi-layer structure which is sequentially arranged from inside to outside: a nutrition core layer, a controlled release film layer, a soil improvement fast exchange layer and a microorganism attaching layer. The nutrition core layer contains nitrogen, phosphorus, potassium and medium trace elements, and meets the basic nutrient requirements of crops; the controlled release film layer is self-assembled layer by layer by adopting alginate / chitosan, a humic acid-ferrous complex and a breakable cross-linking point are inserted into the film, and starch is sprayed on the outer layer, so that an ionic strength / alkalinity dual-response controlled release system is formed; the soil improvement quick exchange layer contains microcrystalline gypsum and ferrous sulfate; the microbial epiphytic layer fixes salt-tolerant phosphate solubilizing bacteria, potassium bacteria and exopolysaccharide-producing bacillus by using a charcoal-zeolite carrier, and the bacteria are distributed on the surfaces of the particles in a dotted manner. The fertilizer realizes organic combination of soil improvement, fertilizer supply and microbial regulation and control, can significantly reduce the soil salinity and alkalinity in a saline-alkali soil environment, and improves the fertilizer utilization rate and the crop growth performance.

The invention relates to the field of organic fertilizer manufacturing, in particular to a preparation method of a humic acid-containing water-soluble organic fertilizer with chelated medium trace elements for synergism, and the preparation method comprises the following steps: S1, adding modified humic acid into deionized water, heating to 40-50 DEG C, stirring for 25-35 minutes, adding hydrated ferrous sulfate, introducing compressed air, and stirring for reaction for 30-50 minutes to obtain a chelating solution and the like; according to the invention, the environmental adaptability of humic acid is improved through molecular structure modification, a composite chelation system is constructed to enhance element stability, a multistage chelation sequence is optimized to prevent ion antagonism, and a physical barrier is innovated to realize a core process path of intelligent controlled release. The functional limitation of a traditional fertilizer in a complex agricultural ecological system is effectively broken through, the nutrient utilization efficiency and agricultural sustainability are remarkably improved, and the fertilizer has wide application prospects in soil remediation, precision agriculture and resource-saving planting systems.

The invention provides high-performance silver powder suitable for TOPCon battery fine grid silver paste, a preparation method of the high-performance silver powder and the silver paste, and belongs to the technical field of photovoltaic materials. The preparation method comprises the steps that a silver salt solution and a composite reducing agent are mixed, a first-stage hydrothermal reaction is carried out at the first temperature, a second-stage hydrothermal reaction is carried out at the second temperature, and silver powder is obtained after centrifugation, washing and drying; wherein the composite reducing agent is selected from a mixture of two of potassium tartrate, sodium sulfite and ferrous sulfate. According to the method, gradual growth and crystallinity improvement of silver crystal nucleuses are achieved through two-stage heating, particle aggregation or uneven morphology caused by rapid reduction is avoided, in addition, the adopted composite reducing agent combination is remarkably superior to a single reducing agent (such as ascorbic acid), and the morphology and particle size distribution of the silver powder can be more accurately regulated and controlled.

The invention belongs to the technical field of coal combustion, and particularly relates to an environment-friendly rare earth catalyst as well as a preparation method and application thereof in promoting coal combustion. The catalyst is prepared from composite rare earth oxide, calcium oxide, potassium carbonate, ferrous sulfate, kaolin, diatomite and a multi-component composite assistant component in a specific proportion through the steps of slurry ultrasonic activation, rare earth coating, assistant step-by-step doping, microwave drying, protective atmosphere roasting and the like. The catalyst is unique in structure and good in dispersity, the coal combustion efficiency can be remarkably improved, the burnout temperature and the carbon content of fly ash are reduced, emission of flue gas pollutants such as CO, NOx and SO2 is effectively reduced, and the catalyst is suitable for the fields of energy conservation, carbon reduction and environment-friendly treatment of coal-fired power plants and industrial boilers.

The invention provides a recovery method of a sodium ferrous sulfate waste pole piece and a sodium ferrous sulfate positive electrode material, and belongs to the technical field of sodium ion batteries. The recovery method of the sodium ferrous sulfate waste pole piece comprises the following steps: separating a positive electrode material and carbon from the sodium ferrous sulfate waste pole piece to prepare a first mixed solution containing FeSO4.xH2O, Na2SO4.yH2O and carbon; wherein 1 < = x < = 7, 1 < = y < = 10; adding an antioxidant and a pH value regulator into the first mixed solution to obtain a second mixed solution; carrying out pulpifying treatment on the second mixed solution to obtain slurry; drying the slurry to obtain a precursor; and sintering the precursor to obtain the sodium ferrous sulfate positive electrode material. The sodium ferrous sulfate positive electrode material comprises sodium ferrous sulfate and a carbon net which is coated on the surface of the sodium ferrous sulfate and is of a porous structure, can enhance infiltration of an electrolyte and shorten a sodium ion transmission path, and has excellent electrochemical performance.

The invention discloses a method for producing mRNA (messenger ribonucleic acid) template plasmids by fermenting escherichia coli. When the recombinant escherichia coli is fermented and cultured, a seed solution of the recombinant escherichia coli is inoculated into a basic culture medium to be fermented and cultured until the OD600 value of fermentation liquor is 18-22, then a fed-batch culture medium is continuously added at the feeding rate of 5-15 mL / L / h to be subjected to continuous fed-batch fermentation culture, the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate, and the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate. The basal culture medium contains 10-15 g / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the basal culture medium contains 0.1-0.3 mmoL / L of a ferric salt compound, 0.1-0.3 mmoL / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the fed-batch culture medium contains 360-480 g / L of glycerol, and the ferric salt compound is one or more of ferrous citrate, ferric ammonium citrate or ferrous sulfate heptahydrate. According to the method, the yield and superhelix content of the mRNA template plasmids are improved by optimizing the culture medium formula and culture conditions, and large-scale production of the high-quality target mRNA template plasmids is facilitated.

The invention relates to the technical field of soil improvement, in particular to a saline-alkali soil improver prepared by compounding ferrous sulfate and fly ash as well as a preparation method and application of the saline-alkali soil improver. By scientifically compounding the ferrous sulfate, the active fly ash, the beer fermentation residues, the attapulgite and the microbial agent, the proportion of all the components is optimized, the synergistic effect of all the components is fully exerted, the improvement effect of the saline-alkali soil is remarkably improved, and multi-dimensional improvement of the saline-alkali soil is achieved. The saline-alkali soil improver can effectively reduce the pH value and salt content of soil, improve the soil structure, improve the soil fertility and biological activity and promote plant growth. Compared with the prior art, the saline-alkali soil improver has the advantages of being good in improvement effect, lasting in effect, low in cost, environmentally friendly and the like, is suitable for large-area saline-alkali soil improvement and agricultural production, and has good application and popularization prospects.

The application relates to a method for one-step synthesis of strong magnetic hydrophobic Fe3O4 nanoparticles at low temperature and the Fe3O4 nanoparticles and application, and belongs to the technical field of nano material preparation. The method comprises the following steps: adding a ferrous sulfate solution into a mixed solution of sodium hydroxide and sodium nitrate, heating and stirring to react, adding oleic acid in the reaction process, and obtaining black Fe3O4 crystals after the reaction is completed. The saturation magnetization of the obtained strong magnetic hydrophobic Fe3O4 nanoparticles can reach 85.69 emu / g at most, and the water contact angle can reach 148.95 DEG. The one-step synthesis reaction only needs to use oleic acid as a regulator, avoids an extreme high-temperature and high-pressure environment, does not need to use a toxic chemical solvent, the condition is mild, the process is simple, the operation condition is easy to control, and the method has a wide application prospect.

The invention provides a manganese-doped ferrocobalt oxide nano particle-coated carbon-nitrogen cubic composite material as well as a preparation method and application of the manganese-doped ferrocobalt oxide nano particle-coated carbon-nitrogen cubic composite material. The preparation method comprises the following steps: firstly doping ferrous sulfate and manganese chloride into ZIF-8, then mixing the ZIF-8 with cobalt nitrate and 2-methylimidazole in methanol, carrying out centrifugal separation to obtain a product, and finally carrying out one-step calcination to realize carbonitriding of the composite material, doping of manganese and generation of nano particles from ferrocobalt oxide. And finally, the manganese-doped ferrocobalt oxide nanoparticle-coated carbon-nitrogen cubic composite material is obtained. Compared with the traditional preparation method, the method disclosed by the invention is simple, mild in reaction condition and high in yield, and the prepared composite material is uniform in morphology and has excellent electro-catalytic performance on the water electrolysis oxygen evolution reaction.

The invention discloses an advanced treatment method of tungsten beneficiation wastewater, which is characterized in that a composite flocculant is adopted to flocculate the tungsten beneficiation wastewater, and the composite flocculant is mainly composed of cationic polyacrylamide, a flocculant A and lignocellulose, the flocculant A comprises at least one of polyferric sulfate, polyaluminum chloride, polyaluminum ferric chloride, polyaluminum ferric sulfate, ferric sulfate, ferrous sulfate and aluminum chloride. According to the advanced treatment method for the tungsten beneficiation wastewater, under the action of the composite flocculant, the cost of a treatment agent can be reduced to about 0.16-0.20 yuan / m < 3 >, the cost reduction amplitude is as high as 80% or above, the treatment time can be shortened to be within 10 min, the precipitation time is greatly shortened, meanwhile, suspended solids in the wastewater can be effectively removed, actual production requirements are met, and the method is suitable for industrial production. The method has the advantages of low treatment cost, high treatment efficiency, good removal effect, good adaptability and the like, can realize advanced treatment of the tungsten beneficiation wastewater, and is high in use value and good in application prospect.

The invention relates to the technical field of agriculture, in particular to an iron-rich yield-increasing foliar fertilizer for rice as well as a preparation method and an application method of the iron-rich yield-increasing foliar fertilizer. According to the specific technical scheme, the iron-rich yield-increasing leaf fertilizer for the rice is prepared from, by mass, 15%-25% of porous chitosan, 20%-30% of L-malic acid and 45%-55% of ferrous sulfate. The technical problem that in the prior art, the cadmium content of brown rice cannot be reduced while the iron content cannot be increased through a leaf fertilizer is solved.

The invention discloses a method for removing arsenic and recovering copper and zinc from scrap copper smelting smoke dust, which comprises the following steps: carrying out first-stage acid leaching on the scrap copper smelting smoke dust to obtain first-stage leaching liquid and first-stage leaching slag; second-stage acid leaching is conducted on the first-stage leaching residues, second-stage leaching liquid and second-stage leaching residues are obtained, and the second-stage leaching liquid is returned to the first-stage acid leaching; zinc oxide is added into the first-section leaching solution to adjust the first-section leaching solution to a preset pH value, then iron powder is added to replace copper in the mixed leaching solution, and copper sponge and a replaced solution are obtained; zinc oxide is added into the replaced liquid to adjust the replaced liquid to a preset pH value, then ferrous sulfate heptahydrate is added, oxygen is introduced for oxidation arsenic precipitation, and arsenic precipitation residues and arsenic precipitation liquid are obtained; and adding zinc oxide into the arsenic-precipitated liquid to adjust the arsenic-precipitated liquid to a preset pH value for neutralization and purification to obtain neutralized and purified residues and a zinc sulfate solution, and returning the neutralized and purified residues to the second-stage acid leaching. According to the method, the valuable elements of arsenic, copper and zinc can be thoroughly separated, and arsenic precipitation caused in the zinc stannate decomposition process can be avoided.

The invention relates to the technical field of air filter elements, in particular to an iron-manganese-based filter element material for catalyzing and purifying VOCs (volatile organic compounds) at room temperature and a preparation method of the iron-manganese-based filter element material. The iron-manganese-based filter element material for catalyzing and purifying the VOCs at the room temperature is prepared from the following raw materials in parts by mass: 20 to 30 parts of ferrous sulfate, 30 to 40 parts of manganese sulfate, 0.1 to 1 part of ceric ammonium nitrate, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 3 parts of urea steam, 5 to 15 parts of attapulgite clay, 1 to 5 parts of aerogel aid and 1 to 5 parts of sodium alginate. The preparation method is simple, the adsorption capacity and the adsorption capacity of indoor volatile organic pollutants such as formaldehyde are greatly improved, the formaldehyde removal efficiency can be improved, the service life of the material can be prolonged, and the material is suitable for large-scale popularization and application.

The invention provides a phosphorus-doped CoFe-LDH electrode for high-current hydrogen production as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing foamed nickel subjected to acid pickling treatment with a red phosphorus solution, and carrying out hydrothermal reaction to obtain NiP; the preparation method comprises the following steps: immersing NiP into a mixed solution of cobalt acetate tetrahydrate and 2-methylimidazole to obtain Co-ZIF-L-coated NiP; and the Co-ZIF-L (at) NiP is immersed in a ferrous sulfate tetrahydrate solution, and the CoFe-LDH (at) NiP-120 electrode is obtained through heating. An anion exchange membrane water electrolysis device (AEM) based on the electrode shows remarkable activity when the voltage is 1.85 V, the current density reaches 100 mA cm <-2 >, and obvious performance degradation does not occur when the AEM stably operates for 70 h under the large current density of 100 mA cm <-2 >. Compared with an existing electrolyzed water electrode, the method has the characteristics that active sites are accurately regulated and controlled, the structural stability is improved, and the process cost is reduced.

The invention provides a lepidolite flotation wastewater treatment device and a flotation process, and relates to the technical field of wastewater treatment, the lepidolite flotation wastewater treatment device comprises an oxidation reaction tank, a multi-point feeding mechanism and a swing mechanism; the multi-point feeding mechanism comprises a mounting plate, a liquid outlet pipe and a two-way threaded screw rod, the two sides of the mounting plate are fixedly connected with the inner wall of the oxidation reaction tank, a sliding rail is fixedly arranged at the top of the mounting plate, and a moving seat is slidably connected to the surface of the sliding rail. According to the scheme, when the amidoxime lepidolite-containing flotation wastewater is treated, ferrous sulfate and hydrogen peroxide are added into the flotation wastewater, so that oximido and amino of amidoxime are destroyed, complexed heavy metals are released, macromolecular organic matters are degraded, the heavy metals are ensured to be completely free, and the heavy metals in effluent are prevented from exceeding the standard; in addition, the hydrogen peroxide is gradually added in a multi-point mode, bumping caused by local over-concentration is avoided, inner side spraying is adopted during spraying, and bumping of the liquid level due to the fact that the hydrogen peroxide is directly sprayed downwards and settles to the bottom of the pool under the action of gravity is avoided.

The invention discloses a ferrocobalt-based self-supporting oxygen evolution electrode and a preparation method and application thereof, and belongs to the technical field of electrodes. The electrode is obtained by growing a layer of needle-like ferrocobalt layered double hydroxide catalyst on the surface of foamed nickel through a simple solution immersion-etching method and through preparation of a precursor solution. The preparation method comprises the following steps: mixing an isopropanol solution of cobalt nitrate with a ferrous sulfate aqueous solution, and putting a nickel-based substrate into the solution for immersion etching, so as to obtain the cobalt-iron layered double hydroxide catalyst electrode. The preparation method disclosed by the invention is mature and simple in process route, mild in condition, easy to control and easy to amplify, and the oxygen evolution (OER) catalytic activity of the nickel-based catalyst is also remarkably improved.

The invention relates to the technical field of positive electrode material precursors, in particular to a method for preparing battery-grade iron phosphate by taking titanium dioxide waste acid as a raw material and application of the battery-grade iron phosphate. Hydrolysis waste acid in the titanium dioxide industry is selected as the raw material, ammonia gas is used as a pH regulator, and phosphorus salt and hydrogen peroxide are used as precipitants; the solubility product constants of aluminum phosphate and titanium phosphate are small, Al < 3 + > and Ti < 4 + > in the hydrolysis waste acid are precipitated by adopting soluble phosphate and then are filtered and removed, iron ammonium phosphate is precipitated by virtue of phosphorus salt and is fully washed, and the content of metal impurity ions can be reduced to be less than 100ppm; according to the method, ferrous sulfate is subjected to fractional precipitation, impurity removal, precipitation, washing and aging under different pH conditions, so that the use amount of alkaline substances is greatly reduced, and the problems of high liquid waste treatment cost and resource waste in the traditional titanium dioxide industry are solved.

To provide a heavy metal insolubilizing material for insolubilizing heavy metal contained in a heavy metal contaminant (for example, incineration ash, soil, and drainage water), which can exhibit an excellent insolubilization effect to a plurality of kinds of heave metal (for example, arsenic and hexavalent chromium), in a short time (for example, 2 to 3 hours).SOLUTION: A heavy metal insolubilizing material contains an iron compound composed of either or both of ferrous sulfate monohydrate and ferrous chloride tetrahydrate, and a magnesium compound composed of one or more selected from the group consisting of magnesium sulfate heptahydrate, magnesium sulfate nonhydrate, and magnesium sulfite hexahydrate. A ratio of the iron compound in the total amount of the iron compound and the magnesium compound is 5 to 80 mass%. The heavy metal insolubilizing material can be prepared in a powdery form.SELECTED DRAWING: None

The invention belongs to the technical field of auxiliary preparation, and provides a curing material applied to a flameless combustion process of copper-containing sludge and a preparation method. The preparation method comprises the following steps: firstly, mixing iron nitrate nonahydrate, ferrous sulfate heptahydrate, a manganous nitrate solution and citric acid to prepare a ferrite precursor; further, a rare earth phosphate nano dispersion is synthesized through a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, and ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate radicals and fluorine ions; meanwhile, multi-element co-doped amorphous powder is prepared through a sol-gel method, tetraethoxysilane serves as a silicon source, zirconium oxychloride octahydrate, tetra-n-butyl titanate and niobium pentachloride are supplemented, a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment, and the high-temperature mechanical property is provided; and finally, mixing kaolin or bentonite mineral powder with the synthesized ferrite precursor, the rare earth phosphate nano dispersion, the multi-element amorphous powder and other auxiliaries to form slurry, and drying to form the curing material.

The present application belongs to the field of the preparation of high-purity ferric phosphate, and provides a low-impurity ferric phosphate, and a preparation method therefor and the use thereof. The preparation method comprises: mixing wet-process phosphoric acid with water to obtain a phosphoric acid solution, adjusting the pH of the phosphoric acid solution, and heating and aging same to obtain an aged slurry; filtering same to obtain a phosphate solution, and adding water and a first oxidant to obtain an aqueous phosphate solution containing the first oxidant; mixing a ferrous sulfate solution with the aqueous phosphate solution containing the first oxidant to obtain a first slurry; heating and aging same, and after the color of the first slurry changes, adding a second oxidant to the first slurry to obtain a second slurry; and performing solid-liquid separation on the second slurry, and sequentially washing, drying and sintering the obtained solid material to obtain a low-impurity ferric phosphate. In the present application, wet-process phosphoric acid is used as a raw material, and therefore the utilization rate of phosphorus in the wet-process phosphoric acid is greatly increased; moreover, prepared anhydrous ferric phosphate has a relatively low impurity content.

The invention discloses high-durability quick-hardening concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials: aluminoferrite cement, vitreous calcium aluminate clinker, a coagulant nucleation agent, a nano hybrid siliceous material, a calcium-magnesium composite expanding agent, a self-healing agent, a hydration heat regulating agent, a water reducing agent, an early strength agent, a defoaming agent, a thickening agent, a retarder, an air entraining agent and aggregate. The coagulating nucleating agent is prepared from semi-hydrated gypsum, ferrous sulfate and aluminum potassium sulfate; the nano hybrid siliceous material is prepared by reacting acidic silica sol with sodium methyl silicate at 40-60 DEG C for 1-3 hours. According to the high-durability quick-hardening concrete and the preparation method thereof, the iron aluminate cement, the vitreous calcium aluminate clinker, the coagulant nucleation agent, the nano hybrid siliceous material, the calcium-magnesium composite expanding agent, the self-healing agent and the hydration heat regulating agent are utilized to form a brand-new high-durability and high-adaptability quick-hardening system. The mechanical property, the volume stability and the durability are comprehensively superior to those of the traditional quick-hardening concrete.

The invention relates to the field of industrial waste gas treatment, and discloses a technology for removing NOx and SOs in industrial flue gas through an ultrasonic atomization wet method. The technology comprises the steps that S1, the industrial flue gas is cooled and dedusted; s2, performing oxidation washing on NO by using a first washing solution and a second washing solution respectively; s3, absorbing NOx and SOs generated by oxidation of the industrial flue gas by using an absorption liquid subjected to ultrasonic atomization; s4, carrying out demisting treatment on the industrial flue gas; a first washing solution in the step S2 is a 0.5-1.5 wt% potassium persulfate aqueous solution, and a second washing solution is composed of 1-2wt% of ferrous sulfate, 0.5-1wt% of EDTA and the balance of water; the absorption liquid in the step S3 is prepared from basic hydroxide, carbonate, an interface modifier and water. According to the ultrasonic atomization wet process, the solid precipitation amount of the absorption liquid is small, the NOx and SOabsorptivity is high, and equipment cannot be corroded after long-term use.

The application provides an alloying modification method of a platinum catalyst, relates to the field of electrochemical catalysis, and particularly relates to the following steps: mixing 5% of a platinum carbon catalyst and a phytic acid solution uniformly, performing freeze-drying treatment, performing one-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain a powder; adding ferrous sulfate and 1,10-phenanthroline, performing second-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain an alloying modification carbon-based catalyst. The method is alloyed by the metal platinum and a transition metal, effectively improves the activity and stability of the catalyst, reduces the use amount of the noble metal platinum, and effectively reduces the manufacturing cost of the catalyst; and the alloying modification carbon-based catalyst obtained by the method can be used for the preparation of a primary zinc-air battery, a rechargeable zinc-air battery and the like.

This application relates to the field of chemical production and discloses a metal salt catalyst for desulfurization and denitrification, its preparation method, and its application. The catalyst comprises an active metal component of 30%-35%, a support of 60%-65%, and an additive of 5%-10%. The active metal component is specifically ferrous sulfate. The activity of the ferrous salt at medium and low temperatures, combined with the adjustment of the catalyst surface acidity by alkali metal sodium and rare earth element cerium, broadens the active temperature range. The support is specifically alumina. The additives consist of 3%-6% alkali metal sodium and 2%-4% rare earth element cerium by mass. Simultaneously, alkali metal sodium and rare earth element cerium can reduce impurity adsorption and enhance resistance to poisoning. This invention, through the rational selection of the active metal component, support, and additives, broadens the active temperature range of the catalyst, enabling it to adapt to flue gas temperature changes under different operating conditions, thus providing a wider range of applications for desulfurization and denitrification in industrial production.

The application provides a method for treating and recycling iron-containing waste sulfuric acid in titanium dioxide production, which is based on screening of a strain capable of treating iron-containing waste water in a low pH environment, and establishes a method for treating iron-containing waste sulfuric acid, which can effectively realize resource recycling. The waste water treatment bacteria used are Bacillus QD-QJ-062 strain, and the preservation number is CGMCC No.33725. The QD-QJ-062 strain of Bacillus screened by the application can effectively treat the iron-containing waste water in a low pH environment, promote the generation of ferrous oxalate precipitation, and generate ferrous oxalate by-products. The generated ferrous oxalate can be converted into ferrous sulfate by sulfuric acid, and oxalic acid can be recycled, thereby reducing the operation cost. The sulfuric acid solution after iron removal can be neutralized by limestone to generate high-purity gypsum, thereby realizing resource recycling and treatment.

The invention relates to the technical field of chemical oil-displacing agents for tertiary oil recovery, and particularly discloses a magnetic nano oil-displacing agent and a preparation method thereof. The preparation method comprises the following steps: S1, taking purple phosphorus nanosheets, ferrous sulfate, ferric chloride and ammonia water as raw materials to react to obtain magnetic purple phosphorus nanosheets; s2, reacting the polymer A with ethylenediamine to obtain an aminated polymer A; s3, adding the aminated polymer A or polymer B and 4-dimethylaminopyridine 1, 3-dicyclohexylcarbodiimide into an aqueous solution of the magnetic purple phosphorus nanosheet, so as to obtain a modified magnetic purple phosphorus nanosheet; s4, performing ammonification reaction on the surfactant to obtain an aminated surfactant; and S5, adding an aminated surfactant into the modified magnetic purple phosphorus nanosheet aqueous solution, then adding N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and carrying out a reaction to obtain the magnetic nano oil displacement agent. The oil-displacing agent disclosed by the invention can realize magnetic recovery while realizing a viscosity reduction effect so as to improve the oil recovery rate, and waste of raw materials is avoided.