350 results about "Copper sulfate" patented technology

The invention provides a preparation method of a porous copper foil with a regular polygonal hole array, which comprises the following steps of: grinding and polishing a titanium plate until the titanium plate is matte, punching holes with the regular polygonal hole array in the titanium plate by laser, finely trimming vertex angles of the regular polygonal holes by laser, and polishing and grinding the titanium plate to obtain the porous copper foil with the regular polygonal hole array. The method comprises the following steps: preparing a titanium plate, cleaning with pure water and alcohol to obtain a clean titanium plate, preparing a copper sulfate electrolyte, adding a proper amount of a brightener, a wetting agent and a high resistance agent into the electrolyte, mixing, pouring the mixed solution into an electrolytic bath, putting the clean titanium plate and a carbon plate into the electrolytic bath, and carrying out electrolytic foil generation by taking the titanium plate as a cathode and the carbon plate as an anode; and after foil generation is finished, the copper foil is stripped from the surface of the titanium plate, and the porous copper foil with the regular polygon holes is obtained. According to the method, the holes of the titanium plate are the regular polygon holes, and the vertex angles of the regular polygon holes are finely trimmed, so that the copper foil of the electrolytic raw foil is not easy to adhere to the titanium plate during stripping, and the production yield of the copper foil is further improved.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The application discloses a preparation method and purification process of copper hydroxide, a certain amount of anhydrous copper sulfate is accurately weighed, and a certain volume of deionized water is added to prepare a solution with a certain concentration, a copper ammonia solution is prepared: slurry is prepared from circuit board sludge, screening is performed, ammonium bicarbonate or ammonium carbonate is added for reaction, and a copper ammonia solution containing carbonate or bicarbonate is obtained through purification; in addition, high-purity copper powder is added into concentrated ammonia water, concentrated hydrogen peroxide solution is slowly dropped into the concentrated ammonia water, and the dropping is continued until no large amount of bubbles is generated in the solution, and the solution is filtered to obtain a clear indigo blue solution. The production process adds the step of adding a stabilizer and stirring, guarantees the stable state of the copper hydroxide crystal, and enables the copper hydroxide crystal to remain unchanged into copper oxide for one year in an environment with a temperature as high as 60 degrees.

The present application provides a kind of prevention and control method of green moss in water lily planting pool, specifically belongs to water quality control technical field.The prevention and control method of green moss in water lily planting pool described in the present application includes the following steps: before planting water lily, water injection, water level is controlled at 15~20cm, copper sulfate is applied to kill green moss and its spores, keep water body not to flow during disinfection;After disinfection, apply sodium thiosulfate, and plant water lily;After planting water lily, keep replenishing water, control water level to 40~50cm, when green moss first outbreak, apply mineral fulvic acid potassium and composite bacillus;Subsequent green moss outbreak, apply mineral fulvic acid potassium, or apply mineral fulvic acid potassium and composite bacillus.The prevention and control method described in the present application is safe and efficient, which can quickly and effectively remove green moss without inhibiting the growth of water lily, and also does not affect the harvest of water lily.

The invention discloses an ellagic acid-copper metal organic framework nano material, a preparation method thereof and application of the nano material as an anti-tumor drug carrier. According to the nano material, natural polyphenol ellagic acid is used as an organic ligand, copper ions are used as a metal center, and a three-dimensional supramolecular frame structure is formed through coordination. The preparation method comprises the following steps: mixing an N-methyl pyrrolidone solution of ellagic acid with a methanol solution of copper sulfate, and stirring and reacting at room temperature to efficiently synthesize the copper sulfate. The nano material has excellent antibacterial activity and efficient anti-tumor drug loading capacity, has the intelligent drug release characteristic of dual response of pH and glutathione, and can accurately release drugs in a tumor microenvironment. The nano material provided by the invention can be used as an anti-tumor drug carrier, synchronously realizes anti-tumor and antibacterial dual effects, effectively prevents and treats bacterial infection complications in tumor treatment, and provides a new material for developing a new strategy for tumor synergistic treatment.

The utility model discloses a copper sulfate recovery machine, include: stirring device, including vertical jar, be located in the stirring paddle of vertical jar, drive the motor of stirring paddle agitates, the vertical jar inside holds microetching solution, the stirring paddle is used for stirring the microetching solution in the vertical jar, crystallization device, including annular board, set up in the cooling pipe of annular board inside, the radial outer surface of annular board with the radial inner surface of vertical jar is matched, the cooling pipe is along the circumferential spiral of annular board and extends, scrape out device, including annular scraper, drive the first power part of annular scraper and lift, the inboard of annular scraper with annular board is matched, the inboard of annular scraper holds the stirring paddle, the inboard of annular scraper moves downward to scrape out the crystalline body of annular board inboard. The utility model can solve the problem that the jar wall crystal of traditional equipment is difficult to fall off, and the continuous production efficiency is improved significantly.

The invention discloses a multi-band high-stability ferrite magnetic material composite formula and a preparation process, and relates to the technical field of magnetic materials. The ferrite magnetic material composite formula comprises 38-42 parts of ferric oxide powder, 37-41 parts of ferroferric oxide powder, 6-12 parts of graphene nanosheets, 5-7 parts of hydroxypropyl methyl cellulose, 6-9 parts of lanthanum oxide, 4-6 parts of scandium oxide, 1-3 parts of nano titanium dioxide, 4-6 parts of bismuth magnesium boron, 9-13 parts of ferric sulfate, 3-5 parts of manganese sulfate, 4-6 parts of zinc sulfate, 2-4 parts of copper sulfate and 2-3 parts of samarium sulfate. By utilizing a physical vapor deposition gradient doping process, the problems that an existing ferrite magnetic material is single in electromagnetic performance, cannot stably and efficiently work in a multi-frequency-band complex electromagnetic environment and cannot meet the requirements of the fields of communication, radar, electronic countermeasure and the like for wide-frequency-band and high-performance magnetic materials can be solved.

The application provides a method for promoting mist culture rooting of Pinus squamaeformis, and relates to the technical field of Pinus squamaeformis cutting propagation. The method for promoting mist culture rooting of Pinus squamaeformis comprises the following steps: soaking Pinus squamaeformis cuttings in a citric acid solution in an ice water bath, disinfecting the cuttings, and treating the cuttings with a rooting agent; and then performing mist culture on the cuttings by adding a nutrient agent containing calcium nitrate, potassium nitrate, magnesium sulfate, copper sulfate, indole butyric acid, sodium phytate and lauryl alcohol polyether-4. The method overcomes the shortcomings of the prior art, effectively promotes rapid rooting of Pinus squamaeformis branches, guarantees the growth of root systems, provides a fast and convenient method for stable seedling raising of Pinus squamaeformis, and guarantees artificial breeding of Pinus squamaeformis.

The utility model discloses a cathode protection copper sulfate evaporator, which is characterized in that a plurality of anodes are arranged in the copper sulfate evaporator, the anodes are inserted in a copper sulfate solution in the copper sulfate evaporator, and the anodes, a cathode binding post and a reference electrode are all connected with a constant potential controller; the constant potential controller, the anode, the copper sulfate solution in the copper sulfate evaporator and the copper sulfate evaporator body form a current loop, the controller outputs direct current, and the protection potential of the equipment is changed by automatically controlling the magnitude of the output direct current until the potential of the equipment reaches the protection potential ranging from-0.1 V to-0.6 V; a cathode protection anti-corrosion technology is applied to the copper sulfate evaporator, uniform corrosion and pitting corrosion caused by high-temperature dilute sulphuric acid and high-concentration chloride ions of equipment materials in a copper sulfate solution are prevented, the corrosion speed is reduced, and the service life is prolonged.

The present application mainly relates to a kind of preparation of sulfur-rich amino acid protein CMd-copper nanoclusters and its detection mercury ion method, comprising: a) by prokaryotic expression obtains CMd protein, and the protein concentration of 5 mg / mL-25 mg / mL CMd protein solution is obtained by purification.b) CMd is reacted with reducing agent TCEP after opening protein disulfide bond.c) the protein solution after reduction is reacted with anhydrous copper sulfate, and preparation high fluorescence CMd-copper nanocluster.d) CMd-copper nanocluster is applied to detect heavy metal mercury ion.The application method can be synthesized under mild aqueous conditions by "one-step method" structure controllable, stable CMd-copper nanocluster, widens the raw material of copper nanocluster synthesized with protein as template, avoids the use of organic solvent and strong reducing agent, and reduces the cost and environmental burden brought by noble metal raw material, and also has higher selectivity to mercury ion.

The invention discloses a method for preparing a corrosion-resistant composite film by using an acyl fluoride byproduct, and belongs to the technical field of preparation of corrosion-resistant films on surfaces of steel materials. The method comprises the following steps: by taking a perfluoropropylene oxide (HFPO) acyl fluoride byproduct as a raw material, mixing the raw material with a solvent and an acid-binding agent to prepare a film-forming agent; and double-layer self-assembly of a polyacrylic acid layer and an acyl fluoride by-product film layer is carried out on the surface of the steel by combining a polyacrylic acid mixed solution, and the corrosion-resistant composite film is formed on the surface of the steel after high-temperature curing. According to the invention, the high value of the HFPO byproduct is realized, the dripping time of the copper sulfate of the composite film reaches 298-426 s, and the electrochemical corrosion resistance is excellent; and chromizing and phosphating pollution processes are not needed, the process is simple and convenient, the cost is low, and the method is suitable for steel materials and can be popularized to the field of manufacturing of buildings, automobiles and major equipment.

The invention provides a nutrient solution formula. The nutrient solution formula comprises organic nitrogen, organic phosphorus, organic potassium, active calcium, quick-acting sulfur, magnesium, zinc, selenium, ferrous sulfate, organic silicon, expanded fertilizer, mineral source humic acid, chitin, live bacterial fertilizer, boric acid, manganese sulfate, zinc sulfate heptahydrate, ammonium molybdate, copper sulfate heptahydrate, disodium iron ethylenediaminetetraacetate, citric acid and water. According to the nutrient solution formula and the preparation system thereof provided by the invention, microelements are added into the formula, so that the nutrient requirements of vegetables during growth are met, the growth of the vegetables is promoted, and meanwhile, citric acid is added, so that the nutrient solution is stable in property, and the effectiveness of the nutrient solution can be kept in a relatively long period; the physiological acid-base reaction caused in the nutrient solution absorption process of the leaf vegetables can be kept stable, the activity of the root system is improved through high water-soluble phosphorus in the formula, the photosynthesis is improved through the magnesium element, long-acting biological sulfur is provided, and continuous energy supply is provided.

The invention belongs to the technical field of water-soluble fertilizer preparation, and particularly relates to a water-soluble biochar base fertilizer, which is prepared from the following raw materials in parts by mass: 30 to 40 parts of composite modified biochar, 15 to 20 parts of urea, 10 to 20 parts of potassium nitrate, 10 to 15 parts of sodium borate, 2 to 5 parts of copper sulfate, 0.5 to 1 part of zinc sulfate and 0.5 to 1 part of microbial agent. The surface of the biochar contains more oxygen-containing functional groups due to the excellent porous adsorption structure of the biochar, so that soil adsorbs a large number of positive ions, the cell biological permeability is improved, the photosynthesis of plants is enhanced, the nutrient and moisture absorption capacity of plant root systems is enhanced, and the yield and income of food crops and commercial crops are increased by matching with other nutritional ingredients.

The invention relates to the technical field of comprehensive utilization of vanadium titano-magnetite resources, in particular to a flotation combined reagent and a flotation method for vanadium titano-magnetite associated ultralow-grade cobalt-nickel ore. The flotation combined reagent comprises a copper ammonia compound activating agent composed of copper sulfate, ammonium carbonate and sodium citrate, a compound inhibitor composed of sodium humate, tannic acid and sodium tripolyphosphate, a main collecting agent butyl xanthate, an auxiliary collecting agent alkyl hydroxamic acid and a foaming agent diethylene glycol monobutyl ether. According to the method, a technical system of bulk flotation process-novel collaborative reagent system is constructed, so that the technical problem of recycling associated ultralow-grade cobalt and nickel resources in the vanadium titano-magnetite iron separation tailings is successfully solved, the problem of low separation efficiency of ultralow-grade minerals is effectively solved, a complete and efficient technical scheme is formed, and the method is suitable for industrial production. And an innovative technical path is provided for comprehensive recovery of associated cobalt and nickel resources of the vanadium titano-magnetite.

The composite copper foil waste recovery system comprises a dissolving unit, a filtering unit and a recycling unit, the dissolving unit comprises a dissolving kettle and a heating and heat preservation device wrapped around the dissolving kettle, the top of the dissolving kettle is provided with a first inlet and a second inlet, the bottom of the dissolving kettle is provided with an oxygenation mechanism, and the first inlet is communicated with the second inlet. The first inlet is used for receiving composite copper foil fragments, and the second inlet is used for injecting mixed acid liquor, so that the composite copper foil fragments are dissolved and leached in the dissolving kettle (1), and a crude copper sulfate solution is obtained; the filtering unit is used for receiving and filtering the crude copper sulfate solution from the dissolving unit to obtain a purified solution; and the recycling unit is used for receiving the purified solution from the filtering unit and outputting the purified solution which is detected to be qualified to a water plating line. The closed loop of'waste-renewable resources-production raw materials' is realized, the comprehensive benefit of treatment of each ton of waste is improved by more than 50% compared with that of sold, and the method has economic benefits (cost reduction), environmental benefits (waste reduction) and process feasibility.

The invention discloses a method for quickly recovering gold in an ore grinding loop, which comprises the following steps of: firstly, feeding raw ore into a ball mill for ore grinding, and adjusting ore pulp by adopting sodium carbonate; then ball-milled discharged ore is fed into Nelson gravity separation, and gravity separation concentrate and gravity separation tailings are produced; then copper sulfate, a butyl xanthate-ammonium dibutyl dithiophosphate compound and 2 # oil are sequentially added into the gravity separation tailings, the gravity separation tailings are fed into a flash flotation machine for flotation, and flotation concentrate and flotation tailings are produced; the gravity concentrate is further subjected to shaking table concentration, and shaking table tailings and the flotation concentrate are mixed to obtain qualified gold concentrate; and finally, after produced flotation tailings are graded, overflow enters subsequent grading operation, and underflow returns to the ball mill to be ground again. According to the method, coarse grain gold is collected in advance, micro-fine grain dissociation gold is rapidly enriched, meanwhile, ore over-grinding is reduced, and the total recovery rate of gold and the quality of concentrate products are improved.

The application provides a glucose detection test strip and a preparation method and application thereof. The preparation method of the glucose detection test strip comprises the following steps: taking copper sulfate pentahydrate, a phosphate buffer solution, glucose oxidase and horseradish peroxidase, mixing uniformly to obtain an enzyme-containing mixed solution; immersing a test strip in the enzyme-containing mixed solution, and obtaining an organic-inorganic hybrid nanoflower loaded test strip after reaction; immersing the organic-inorganic hybrid nanoflower loaded test strip in a mixed solution containing a chromogenic agent, a gel, bovine serum albumin and polyethylene glycol to obtain a glucose detection test strip. The preparation method of the glucose detection test strip has higher sensitivity and shorter response time.

The invention belongs to the technical field of pet nutrition, and discloses a trace element composite additive for improving the reproductive performance of pets, which comprises the following raw materials: zinc sulfate, sodium selenite, copper sulfate, manganese sulfate, vitamin E acetate, L-lysine hydrochloride, taurine, methionine, selenium yeast and zeolite powder. The zeolite powder is subjected to a specific acid treatment activation process, so that the adsorbability and the stability are improved. The invention also discloses a preparation method of the additive. A three-step mixing process is adopted to ensure the uniformity of the product. The additive is suitable for being added into feed in the breeding period of canine or feline pets, the adding amount of the additive is 0.1-0.5% of the total weight of the feed, and the feeding time is 1 month before breeding and 1 month after breeding. Through scientific proportioning of organic trace elements and inorganic trace elements, in combination with specific amino acids and vitamins, the components have a synergistic effect, so that the pregnancy rate, the litter size and the survival rate of newborn animals of pets are remarkably increased, and meanwhile, the pet feed has good storage stability and use safety.

The invention discloses a hexazinone preparation and a preparation method thereof, and belongs to the technical field of pesticide chemistry. The preparation method comprises the following steps: S1, preparing BC: adding BC, mixing and grinding with copper sulfate pentahydrate, putting into a tubular furnace, calcining, and cooling to obtain Cu-BC; s2, adding a modified silane coupling agent into an ethanol water solution, then adding the Cu-BC obtained in S1, stirring for 6-8 hours at 25-35 DEG C, filtering, washing and drying to obtain modified Cu-BC; s3, hexazinone is dissolved in absolute ethyl alcohol, then the modified Cu-BC is added, ultrasonic dispersion is conducted for 6-8 h, filtering, centrifugal washing and freeze-drying are conducted, and the hexazinone preparation is obtained. According to the preparation method of the hexazinone preparation, the slow release capacity of the preparation can be improved, the hexazinone utilization rate is increased, meanwhile, the preparation can be endowed with the sterilization effect, and the hexazinone preparation has wide application prospects.

This invention discloses an anaerobic biodegradable masterbatch for cast film of sanitary materials, characterized in that its main components, by mass percentage, include: 0.5-3% cypermethrin, 3-6% copper sulfate, 0.1-0.5% metal inorganic salt coating agent, 1-4% ammonium molybdate, 5-10% PLA, 5-10% nano starch, 1-5% carbamide, 7-12% fumed silica, and the balance being a biodegradable resin carrier. The preparation method includes dispersion treatment, centering treatment, structuring treatment, carrier implantation, and plasticizing granulation. The invention also discloses an anaerobic biodegradable cast film for sanitary materials, comprising the following components by mass percentage: 83.4%-97.13% PE-based cast film substrate for sanitary materials, 1-5% PE wax, 1-7.5% degradation masterbatch, 0.15-0.3% dispersant, 0.02-0.2% antioxidant, 0.2-0.6% white oil, 0.5-3% PE grafted maleic anhydride, and 0.2-2% stabilizer. The manufacturing method includes: material preparation, calcium carbonate pretreatment, melting, filtration, and casting. This invention achieves complete anaerobic biodegradation of PE cast leak-proof and breathable films, and also has antibacterial properties during normal use, making it suitable as a breathable film and base film for disposable sanitary materials.

The invention relates to the technical field of photocatalytic CO2 reduction, in particular to a Cu2O-coated CuS composite photocatalytic material with a core-shell structure as well as a preparation method and application of the Cu2O-coated CuS composite photocatalytic material. The preparation method comprises the following steps: mixing copper sulfate, sodium citrate, water, a sodium hydroxide solution and an ascorbic acid solution, standing, and washing and drying collected precipitates to obtain Cu2O with a cubic structure; the method comprises the following steps: mixing Cu2O with water and sodium sulfide, carrying out a stirring reaction, and washing the collected precipitate to obtain a washed precipitate; and mixing the washed precipitate with water and thioacetamide, carrying out a hydrothermal reaction, and washing and drying the collected precipitate to obtain the Cu2O-coated CuS composite photocatalytic material. The core-shell structure Cu2O coated CuS composite photocatalytic material prepared by the invention can effectively enhance the photocatalytic CO2 reduction activity and cycling stability, and has a wide development prospect.

This application discloses a selective absorption membrane, its preparation method, and its application, belonging to the field of solar thermal collection technology. The selective absorption membrane is prepared by anodic etching of copper foil in sodium hydroxide, sodium citrate, and copper sulfate. Compared with vacuum deposition, this preparation method uses readily available raw materials, is simple to operate, and is low in cost. Furthermore, the prepared selective absorption membrane exhibits higher absorptivity in the short-wavelength region, which is beneficial for improving photothermal conversion efficiency. When used in the preparation of solar thermal collectors, it can quickly and efficiently convert solar energy into thermal energy. Photothermal biochar prepared from anaerobic fermentation sludge exhibits excellent adsorption performance. Its application in wastewater treatment forms a closed-loop process of "carbon source capture – anaerobic fermentation – photothermal carbonization," significantly improving the biogas yield and organic matter degradation efficiency of the anaerobic fermentation system.

The application relates to the field of organic matter synthesis, and particularly discloses a method for preparing 2,4-difluorophenol through diazotization and hydrolysis, which comprises the following steps: 2,4-difluorodiazonium salt / sulfuric acid aqueous solution is hydrolyzed under acidic conditions through a catalyst copper sulfate to obtain 2,4-difluorophenol; in the reaction, copper sulfate is used as the catalyst to catalyze the hydrolysis of diazonium salt to obtain the finished product; after the reaction is completed, the catalyst copper sulfate is recovered and applied to the next batch; the process operation is simple and easy to implement, the yield is high, the product quality is high, no waste is generated after the catalyst copper sulfate is applied, and the method is suitable for industrial production.

This invention discloses a high-calcium suspension fertilizer, its preparation method, and its application, relating to the field of fertilizer production technology. By weight, it comprises 20-30 parts of macro-element fertilizer, 10-15 parts of medium-element fertilizer, 3-5 parts of micro-element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water. The macro-element fertilizer consists of 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphorus fertilizer, and 15-20 parts of potassium fertilizer. The medium-element fertilizer is modified nano-calcium carbonate and magnesium carbonate. The micro-element fertilizer consists of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate. Through this method, nano-calcium carbonate can be rapidly absorbed by plants, enabling timely replenishment of calcium ions during plant growth and accelerating plant growth.

The utility model relates to the field of electrochemistry, in particular to a spiral-flow type cation exchange membrane electrolysis device, which is a spiral-flow type electrolysis device for realizing conversion electrolysis of different solution systems by utilizing the characteristic that a cation exchange membrane has selective permeation on cations. Comprising a cathode cylinder, a cation exchange membrane anode, an upper cover, a lower cover, a starting sheet, a cathode region rotational flow lower liquid inlet device, a cathode region rotational flow upper liquid outlet device, an upper starting sheet pressing ring, a lower supporting isolating ring, a sealing assembly and an anode positioning rod. The device is suitable for mutual migration and conversion of cations among a chlorination system, a sulfuric acid system, a nitric acid system, a sulfamic acid system, a phosphoric acid system, a thiourea system and a cyanide system, so that the problem that an original system cannot be normally electrolyzed is solved from the source, and the application range of an electrolysis process is expanded; the method is particularly suitable for efficient metal copper electrolysis when a copper chloride solution system is converted into a copper sulfate solution system.

The invention discloses a continuous crystallization method and system of copper sulfate pentahydrate and a copper sulfate pentahydrate crystal, and the method comprises the following steps: S1, tangentially adding a supersaturated solution of copper sulfate pentahydrate from the bottom of a cyclone fluidized bed crystallizer to form a rotationally rising flow field in the crystallizer; s2, adding a copper sulfate pentahydrate seed crystal to enable the seed crystal to be in a suspended and fluidized state and grow; s3, mixing the copper sulfate pentahydrate mother liquor with supplemented fresh feed liquid, treating to form a supersaturated solution of the copper sulfate pentahydrate again, and returning to the step S1 for circulation; s4, process parameters of continuous crystallization are controlled, and the ratio of the feeding flow Qm to the mother liquor circulation flow Qc is not larger than 3.56%; s5, maintaining the void ratio epsilon of the bed layer to be 0.7 or above by leading out a crystal product; according to the invention, stable and continuous operation can be realized, crystal breakage and secondary nucleation are reduced, and high-purity copper sulfate pentahydrate crystals with large particle size, uniform particle size distribution and regular morphology are obtained; the production efficiency is high and the energy consumption is low.

The invention discloses a palladium-copper monatomic alloy doped indium oxide composite material and a preparation method and application thereof, and belongs to the technical field of gas sensitive sensing materials.The method comprises the steps that indium oxide particles are sufficiently and evenly dispersed in water, a copper sulfate pentahydrate solution is added into dispersion liquid, solid-liquid separation and washing are conducted after sufficient ultrasonic stirring, and the palladium-copper monatomic alloy doped indium oxide composite material is obtained; a copper precursor ion modified indium oxide composite structure is obtained; the preparation method comprises the following steps: uniformly dispersing a copper precursor ion modified indium oxide composite structure in water, reducing, dispersing in water, and adding a certain amount of palladium nitrate to obtain the palladium-copper monatomic alloy doped indium oxide composite material. The material can be used as a sensing layer of a resistance-type semiconductor gas sensor, and realizes high-response, high-selectivity and low-cost detection of dimethyl disulfide.

The invention relates to the field of mineral processing, and provides a method for reducing the content of sulfur in iron ore concentrate, which comprises the following steps: preparing the iron ore concentrate into ore pulp with the mass fraction of 30-50%; s2, the ore pulp in the step S1 is pretreated, and the pretreatment mode is ultrasonic treatment or hydraulic cavitation treatment; the ore pulp pretreated in the step S2 is subjected to flotation operation, sulfur-containing foam is obtained through flotation, low-sulfur concentrate is obtained, and the remaining product is desulfurized iron ore concentrate; the flotation reagent comprises a conditioning agent, a collecting agent and a foaming agent, the conditioning agent comprises lime and copper sulfate, the collecting agent is amyl xanthate, and the foaming agent is methyl isobutyl carbine.According to the method, ultrasonic or hydraulic cavitation pretreatment is combined with the flotation reagent, the floatability of pyrrhotite in the iron ore concentrate is improved, and the flotation efficiency is improved; and the sulfur content in the iron ore concentrate is obviously reduced.

The application discloses a method for lime-free and acid-free copper-sulfur flotation separation, wherein a combined inhibitor for copper-sulfur separation comprises ferrous sulfate and amygdalin, and is used as a pyrite inhibitor in flotation separation of chalcopyrite and pyrite.The combined inhibitor ferrous sulfate and amygdalin, a collector and a foaming agent are added to a raw ore after crushing and grinding to perform a copper flotation operation, and after the copper flotation operation, a combined activator sodium percarbonate and copper sulfate, a combined collector and a foaming agent are added to the ore pulp to perform a sulfur flotation operation.The combined inhibitor ferrous sulfate and amygdalin has a strong inhibiting effect on pyrite, and can effectively realize flotation of chalcopyrite; the combined activator sodium percarbonate and copper sulfate has a good de-inhibiting and activating effect on pyrite, and can effectively realize flotation of pyrite, thereby reducing the mineral processing cost while enhancing the copper-sulfur separation effect, and having a good application prospect.

The invention provides a method for electrochemically detecting sugar concentration. The method comprises the following steps: preparing a solution to be detected, detecting and analyzing. And a to-be-detected solution preparation step: mixing the sugar-containing to-be-detected sample with the copper sulfate-containing solvent to obtain the to-be-detected solution. And a detection step: dropwise adding the solution to be detected into the electrode test piece in a room temperature environment without additional heating, applying a driving voltage to the electrode test piece through an electrochemical voltammetry method so as to activate an oxidation-reduction reaction of the solution to be detected, and monitoring a current value of the electrode test piece in a potential section so as to obtain current value data. And an analysis step: comparing the sugar potential standard data with the current value data to obtain sugar concentration data of the sugar-containing sample to be detected. The method has the advantages of low operation difficulty, high detection efficiency and high detection precision, and solves the production safety problem caused by an old heating program.