1147 results about "Sulfate zinc" patented technology

The invention discloses a green phosphorus-free and nitrogen-free corrosion and scale inhibitor, and relates to the technical field of energy-saving and environment-friendly water treatment agents. The corrosion and scale inhibitor is prepared from polyaspartic acid, hydrolytic polymaleic acid, acrylic acid / hydroxypropyl acrylate copolymer, polyepoxysuccinic acid, delta-valerolactam, sodium borate, zinc sulfate heptahydrate and benzotriazole according to a specific proportion. The preparation method comprises the following steps: preparing the modified polyaspartic acid, adding other components, mixing the modified polyaspartic acid and other components, adjusting the pH value, homogenizing, filtering, filling and the like. The corrosion and scale inhibitor has excellent corrosion and scale inhibition performance, the corrosion inhibition efficiency of the corrosion and scale inhibitor reaches up to 88.6%, and the scale inhibition rate ranges from 90.5% to 92.4%. Compared with a contrast agent, the efficient corrosion and scale inhibition performance is provided, meanwhile, the water treatment agent has the advantages of being environmentally friendly, economical and the like, and is a green water treatment agent with great application prospects.

The invention provides a process for recovering various valuable elements such as lead, zinc, silver and potassium from soot of a steel mill. The process comprises the following steps of water leaching, fluorine removal, high-temperature concentration, primary cooling crystallization, secondary cooling crystallization, secondary leaching, ammonia leaching and ammonia distillation. According to the recovery process, potassium in the soot of the steel mill is recovered in the form of potassium chloride, zinc is recovered in the form of zinc sulfate, silver is recovered in the form of silver chloride, only auxiliary materials such as sulfuric acid, ammonia water and calcium chloride which are low in price are used in the whole recovery process, the cost is low, no waste water or waste residues are generated in the whole process, the direct recovery rate of lead and zinc is 95% or above, and the production cost is low. The direct recovery rate of silver is 98% or above, and the method has practical application value.

The invention discloses a film coating agent for accelerating stabilization of a weathering resistant steel rust layer in a severe atmospheric environment. The film coating agent comprises a film-forming agent and a spraying agent, the film-forming agent comprises a gel agent and a transforming agent; the gel is prepared from one or more of tannic acid, carbomer, chitosan and gelatin; the transforming agent comprises one or more of magnesium sulfate, zinc sulfate and sodium molybdate; the spraying agent comprises an accelerant and an aggressive agent; the accelerant comprises one or more of sodium sulfate, potassium sulfate and chromium sulfate; the aggressive agent comprises one or more of sodium chloride, aluminum chloride and sodium fluoride. The film coating agent provided by the invention can form a stable and uniform rust layer on the surface of the weathering resistant steel, so that the corrosion resistance of the weathering resistant steel is improved.

The invention discloses a ganoderma lucidum culture solution and a culture method thereof. Comprising the following raw materials in parts: 30-40 parts of water, 10-20 parts of corn flour, 1-5 parts of ammonium nitrate, 1-5 parts of monopotassium phosphate, 1-5 parts of potassium sulfate, 1-5 parts of boric acid, 1-5 parts of manganese sulfate, 1-5 parts of zinc sulfate, 1-5 parts of copper sulfate, 1-5 parts of ferric sulfate, 1-5 parts of a short-acting growth regulator, 1-5 parts of amino acid, 1-5 parts of vitamins, 1-5 parts of a seaweed extract, 1-5 parts of honey and 1-5 parts of peaches and oranges. The short-acting growth regulator is prepared from gibberellin, auxin and cytokinin according to the ratio of (2-5): (1-8): (2-9), and the amino acid is prepared by mixing isoleucine, lysine, methionine and phenylalanine according to the ratio of (1-5): (2-8): (4-9): (5-7). The nutrient purity of the culture solution can be greatly increased, the fatality rate is reduced, cell elongation and rooting are promoted, plant metabolism and growth can be greatly promoted, and the quality of ganoderma lucidum is improved.

The invention relates to the field of zinc ion batteries, in particular to a disaccharide eutectic gel electrolyte and a preparation method and application thereof. The preparation method of the disaccharide eutectic gel electrolyte comprises the following steps: firstly, adding disaccharide, choline compounds and zinc sulfate into deionized water, heating and uniformly stirring, then adding a polyacrylamide monomer as well as a thermal initiator and a cross-linking agent which are adaptive to a polymerization reaction with the monomer, and carrying out thermal initiation to form the disaccharide eutectic gel electrolyte. According to the invention, two additives, namely disaccharide and choline, are ingeniously introduced into the traditional gel electrolyte, and the two additives can form the stable disaccharide eutectic gel electrolyte together in the heating and stirring process. According to the innovative strategy, a polyacrylamide hydrogen bond network is enhanced, the cycle performance of the gel electrolyte battery is greatly improved, the configuration entropy of the system is increased due to introduction of the multi-component additive, the problem that an existing gel zinc battery is low in cycle performance is solved, and application of the gel zinc battery in a harsh temperature environment becomes possible.

The invention relates to the technical field of compound fertilizers, and provides a slow-release compound fertilizer for corn and a preparation method of the slow-release compound fertilizer. The fertilizer is prepared from the following raw material components: 35 to 40 parts of thermoplastic resin coated urea, 400 to 450 parts of potassium chloride compound fertilizer, 200 to 300 parts of humic acid coated urea, 10 to 12 parts of zinc sulfate, 30 to 45 parts of large granular urea, 100 to 150 parts of microencapsulated bacillus subtilis granules and 10 to 15 parts of polylactic acid coated borax. According to the invention, borax is coated by a polylactic acid coating technology, so that the release speed of the boron element is effectively delayed, the boron element is ensured to be continuously released from the elongation stage of corn to the large bell mouth stage (20-30 days after sowing), and the problem of premature loss of the boron element in the prior art is solved.

The invention provides an electrolyte for improving the interface stability of a four-electron aqueous zinc-iodine battery, and belongs to the technical field of zinc-iodine battery electrolyte additives, the electrolyte comprises N, N-dihydroxyethyl glycine, zinc sulfate, an additive and water; in the electrolyte, the concentration of the N, N-dihydroxyethyl glycine is 0.5 + / -0.2 mol / L; the molar ratio of the additive to the zinc sulfate is 1: 3; the additive comprises any one of methyl triethyl ammonium chloride, betaine hydrochloride and triethylamine hydrobromide. The electrolyte can enhance the interface stability of the electrode electrolyte, improve the cycling stability and electrochemical performance of the aqueous zinc-iodine battery, inhibit side reactions, and improve the safety and reliability of the battery. The invention also provides a high-capacity aqueous zinc-iodine battery.

The invention discloses a method for detecting antipsychotic drugs and metabolites thereof in a sample and a kit thereof, and relates to the technical field of biological detection.The kit comprises calibrators, quality control products, internal standard solutions and protein precipitators of 13 to-be-detected substances, and the protein precipitators comprise a zinc sulfate aqueous solution containing methanol, 13 analytes can be simultaneously detected, the separation degree of the to-be-detected substance is high, the detection time is short, the required sample size is small, and the method is suitable for TDM high-throughput detection of common antipsychotic drugs.

The invention provides a multi-nutrient balanced lick brick for grazing down producing goats as well as a preparation method and application thereof, and belongs to the technical field of animal feed development. The multi-nutrient balanced lick brick is prepared from the following raw materials in parts by weight: 20 to 100 parts of copper sulfate pentahydrate, 35 to 165 parts of zinc sulfate monohydrate, 0.1 to 1 part of sodium selenite, 54.5 to 270 parts of anhydrous ferrous sulfate, 10 to 40 parts of manganese sulfate monohydrate, 15 to 65 parts of 1 percent cobalt chloride, 0.2 to 2 parts of potassium iodide, 40 to 200 parts of DL-alpha-tocopheryl acetate, 0.2 to 2 parts of vitamin A acetate, 40 to 200 parts of calcium carbonate and 20 to 100 parts of adhesive. And 8855-9765 parts of sodium chloride. The proportion of various nutritional ingredients is reasonably adjusted, the requirements of the grazing cashmere goats for microelements and vitamins can be comprehensively met, then the cashmere density is increased, and the cashmere yield is increased. Meanwhile, the fineness of cashmere can be reduced, and the quality of cashmere is improved.

The invention discloses a copper surface micro-etching coarsening solution for a fine circuit as well as a preparation method and application of the copper surface micro-etching coarsening solution, and relates to the technical field of printed circuit board manufacturing. The copper surface micro-etching coarsening solution for the fine circuit is prepared from, by mass concentration, 60 g / L to 100 g / L of sulfuric acid, 40 g / L to 60 g / L of hydrogen peroxide, 0.5 g / L to 2 g / L of zinc sulfate, 10 g / L to 30 g / L of copper ions, 0.5 g / L to 1 g / L of pyridine heterocycle-containing Schiff base, 10 g / L to 100 g / L of ethyl alcohol, 1 g / L to 3 g / L of 2-mercaptobenzothiazole, 1 g / L to 5 g / L of methionine and 1 g / L to 5 g / L of polyacrylamide. According to the copper surface micro-etching coarsening solution, the 2-mercaptobenzothiazole and the methionine in the copper surface micro-etching coarsening solution can enable the copper surface to form a honeycomb structure under the low micro-etching amount, the zinc sulfate and the pyridine heterocyclic ring-containing Schiff base can form a composite film layer with copper ions on the surface of the honeycomb structure, and the interlayer binding force is improved.

The invention discloses a saline-alkali soil improvement and disease resistance double-effect controlled release fertilizer and a preparation method thereof. The fertilizer comprises 18-22% of biochar, 12-18% of furfural residues, 8-12% of cow dung compost and 6-10% of potassium humate. 5-7% of aluminum sulfate, 4-6% of sulfur and 3-5% of zeolite; the microbial inoculum comprises the following components in percentage by weight: 1.5 to 2.5 percent of saline-alkaline bacillus, 0.8 to 1.2 percent of bacillus subtilis and 0.8 to 1.2 percent 8-12% of a sodium polyacrylate coating, 4-6% of a sulfur coating and 1-3% of polyglutamic acid; 0.8 to 1.2 percent of humic acid chelated iron, 0.8 to 1.2 percent of algal polysaccharide and 0.8 to 1.2 percent of urease inhibitor; 0.8 to 1.2 percent of zinc sulfate, 0.5 to 1.0 percent of manganese sulfate and 0.5 to 1.0 percent of borax. The fertilizer can reduce the pH and conductivity of soil, increase the organic matter content of the soil and effectively improve the physicochemical properties of the soil, meanwhile, by adding the microbial agent, the disease resistance of crops can be effectively improved, the morbidity and disease index of the crops can be reduced, and nutrient release of the fertilizer has a sustained and controlled release characteristic; the initial release rate and the cumulative release rate of nitrogen are both lower than those of common chemical fertilizers, and the cumulative release rate of nitrogen is moderate within 60 days, so that the nutrient requirements of crops in different growth stages can be met.

The invention provides a wormwood planting fertilizer and application thereof, and belongs to the technical field of agricultural planting. The wormwood planting fertilizer is prepared from the following components in parts by weight: 10 to 15 parts of humic acid, 5 to 8 parts of amino acid, 2 to 3 parts of wormwood extract A, 3 to 5 parts of wormwood extract B, 15 to 20 parts of nitrogen-phosphorus-potassium compound fertilizer, 0.01 to 0.03 part of sodium selenite, 0.02 to 0.05 part of zinc sulfate, 0.3 to 0.5 part of cellulose nanocrystal, 0.01 to 0.03 part of malic acid and 0.1 to 0.2 part of sodium alginate. By means of the two-dimensional design that components synergistically enhance absorption and the planting process is matched with the growth rhythm, the problems that in traditional fertilization, nutrients are unbalanced, the selenium and zinc utilization rate is low, and pest and disease damage prevention and control are difficult are solved, efficient absorption of wormwood on microelements, accurate supply of nutrients and reduction of the pesticide use amount are achieved, and the yield of the wormwood is increased. The yield and the medicinal quality are synergistically improved.

The invention discloses an aqueous zinc ion battery electrolyte as well as a preparation method and application thereof, and relates to the technical field of electrolytes. The electrolyte is modified by adding the cyclic ketone small-molecule additive into zinc sulfate, growth of zinc dendrites on the surface of the zinc negative electrode and hydrogen evolution reaction can be effectively inhibited, so that the problems of zinc corrosion and zinc negative electrode passivation are relieved, the mechanism of improving the stability of the zinc negative electrode by the quantity and position of zinc-philic functional group carbonyl is discussed, and the stability of the zinc negative electrode is improved. Experiments prove that the zinc ion battery prepared from the electrolyte successfully constructs the aqueous zinc ion battery with high performance and long cycle stability.

The invention discloses a method for converting livestock and poultry manure into an organic fertilizer through microbial fermentation, and belongs to the technical field of livestock and poultry manure conversion. The method comprises the steps that firstly, the livestock and poultry manure is subjected to physical sorting, lime or monopotassium phosphate is added according to the pH value detection result, and the pH value is adjusted to 6.5-7.5; after determining nutrient components of the feces, adding soluble salt trace elements such as zinc sulfate and mixed carbohydrates of cane sugar and glucose; traditional strains of bacillus, lactic acid bacteria, saccharomycetes and actinomycetes are mixed with novel strains separated from the periphery of a livestock and poultry farm, optimized culture is conducted through a two-step culture method, and plant extracts such as lily extracts or livestock and poultry intestinal metabolites such as short-chain fatty acid are added in the culture process. The fermentation process adopts a rotatable fermentation tank body, and comprises three stages of fermentation of rapid heating, high-temperature stabilization and cooling decomposition. And finally, low-temperature vacuum drying, crushing, granulation and addition of a coating material are performed to prepare the organic fertilizer, so that efficient resource utilization of the livestock and poultry manure is realized.

The invention discloses a Chinese wildrye hydroponic nutrient solution as well as a preparation method and application thereof, and belongs to the technical field of plant cultivation. Each liter of the nutrient solution comprises the following components: 80 to 120 mg of ammonium nitrate, 45 to 55 mg of sodium dihydrogen phosphate dihydrate, 80 to 90 mg of potassium sulfate, 110 to 115 mg of anhydrous calcium chloride, 400 to 410 mg of magnesium sulfate heptahydrate, 1.5 to 2.0 mg of manganese chloride tetrahydrate, 0.08 to 0.10 mg of ammonium molybdate tetrahydrate, 1.1 to 1.2 mg of boric acid, 0.02 to 0.05 mg of zinc sulfate heptahydrate, 0.02 to 0.05 mg of copper sulfate pentahydrate, 15 to 35 mg of ferrous sulfate heptahydrate and 20 to 50 mg of disodium ethylene diamine tetraacetate. The hydroponic nutrient solution provided by the invention meets the nutritional requirements of leymus chinensis, seedlings grow quickly and vigorously by utilizing the nutrient solution, the biomass and nutrient content of the overground part are remarkably increased, and the high-quality pasture characteristics of the leymus chinensis are ensured.

The invention discloses a zinc sulfate solution impurity removal method based on a three-section countercurrent purification process, and belongs to the technical field of hydrometallurgy. Heating the zinc sulfate solution containing impurities to 60-70 DEG C in a first-section reaction tank, reacting for 30-60 minutes, adding the second-section pressure filter residue, and performing pressure filtration to obtain a first-section purified solution and a first-section pressure filter residue; the first-section purified liquid is transferred into a second-section reaction tank, zinc powder and third-section filter residues are added, the adding amount of the zinc powder is 0.8-2 times of the theoretical amount of the zinc powder needed for metal cadmium replacement, the temperature is increased to 70-80 DEG C, a reaction is conducted for 60-90 min, and second-section purified liquid and second-section filter residues are obtained after filter pressing; the second-section purified liquid is transferred into a third-section reaction tank, zinc powder is supplemented, the adding amount is 180-300 times of the theoretical amount of the zinc powder needed for metal cobalt replacement, the temperature is increased to 80-90 DEG C, a reaction is conducted for 90-120 min, and third-section purified liquid and third-section filter pressing residues are obtained after filter pressing; and returning the third-section press-filter residue to the second-section reaction tank, returning the second-section press-filter residue to the first-section reaction tank, and reversely recycling. The method has the advantages of sufficient reaction kinetics, high utilization rate of zinc powder, low zinc content in purified slag, simple process, deep impurity removal, low consumption and high efficiency.

The invention provides a poly-like flocculation flotation method for micro-fine particle galena and micro-fine particle sphalerite. The method comprises the following steps: firstly, mixing to-be-treated ore samples containing micro-fine particle galena and micro-fine particle sphalerite with the particle sizes of less than or equal to 20 microns with water to obtain to-be-treated ore pulp, then sequentially adding zinc sulfate, diethyldithiocarbamate, polyoxyethylene, polyaluminum chloride and a foaming agent, and carrying out air inflation flotation and foam scraping to obtain galena concentrate and tailings. ZnSO4 is adsorbed on the surface of the micro-fine-particle sphalerite in advance and generates a synergistic effect with polyaluminum chloride added subsequently, and N, N '-diethyldithiocarbamate is adsorbed on the surface of the micro-fine-particle galena in advance and generates a synergistic effect with polyoxyethylene added subsequently, so that galena hydrophobic floccules and sphalerite hydrophilic floccules with proper apparent particle sizes are formed; on one hand, the flotation recovery rate of the micro-fine particle galena can be increased, and on the other hand, mechanical entrainment of the micro-fine particle sphalerite can be reduced, so that the flotation separation efficiency of the micro-fine particle lead zinc ore can be effectively improved.

The invention belongs to the technical field of energy storage system device materials, and particularly relates to a modified silk amino acid-based gel electrolyte as well as a preparation method and application thereof. The method comprises the following steps: S1, uniformly mixing and stirring 15 to 30g of acrylamide, 50 to 60g of zinc sulfate heptahydrate, 0.1 to 1g of silk amino acid and 100g of water; adding 5mL to 10mL of ethanol, and uniformly shaking; then sequentially adding a proper amount of N-N methylene bisacrylamide and a photoinitiator, and continuously stirring until the solution is clear to obtain an electrolyte; s2, dropwise adding the prepared electrolyte into a polytetrafluoroethylene (PTFE) plate, and covering the polyurethane fiber membranes obtained by electrostatic spinning on the two sides; and carrying out light curing under ultraviolet irradiation to obtain the modified silk amino acid (M-SAA) gel electrolyte. According to the invention, silk amino acid (SAA) is introduced to construct a compact protective film with a beta folding structure, so that zinc dendrite growth and side reaction are inhibited, and the stability of the zinc negative electrode of the battery and the cycle performance of the battery are improved.

The invention discloses an environment-friendly composite tree wound healing agent and a preparation method and application thereof, and belongs to the technical field of garden maintenance, the environment-friendly composite tree wound healing agent comprises the following raw materials by weight: 40-70 parts of a film forming substrate, 10-20 parts of an active component, and 10-20 parts of a functional auxiliary agent; the film-forming substrate is prepared from the following raw materials in parts by weight: 10 to 20 parts of chitosan, 20 to 30 parts of modified starch and 10 to 20 parts of vegetable wax; the active component is prepared from the following raw materials in parts by weight: 0.1 to 0.5 part of indolebutyric acid, 5 to 10 parts of tea tree essential oil, 3 to 5 parts of radix scutellariae extract, 1 to 2 parts of zinc sulfate and 0.5 to 1 part of boric acid; the functional additive comprises the following raw materials in parts by weight: 2-5 parts of nano titanium dioxide, 3-5 parts of a thickening agent and 5-10 parts of a humectant; the positive effect is achieved on tree wound healing.

The invention discloses an electrolyte for regulating interface reaction based on an organic anion mediated gradient ion pump, and belongs to the field of zinc metal batteries. The electrolyte for regulating and controlling the interface reaction based on the organic anion mediated gradient ion pump comprises a mixed aqueous solution of zinc salt electrolyte and organic anion salt, the zinc salt electrolyte is selected from any one of zinc sulfate, zinc chloride, zinc acetate or zinc trifluoromethanesulfonate; an organic chain in the organic anion salt is of a Janus structure, the organic chain contains hydroxyl and alkyl with hydrophobic end chain parts, the problems that an interfacial film of an existing aqueous zinc metal battery solid electrolyte is prone to failure, a zinc negative electrode is poor in stability, and side reaction is serious are solved, the high-reversibility and long-life zinc deposition / stripping process is achieved through multiple effects of the organic salt additive, and the service life of the solid electrolyte is prolonged. The overall performance of the zinc metal battery is improved.

The invention discloses a fermentation process of citric acid residues, and relates to the technical field of organic acid fermentation. The fermentation process comprises the following steps: mixing and crushing citric acid residues and wheat bran according to a mass ratio of (4-5): 1 to obtain a mixed material; spraying an ammonia water solution, a magnesium sulfate solution and a zinc sulfate solution into the mixed material, adjusting the pH value to 5.0-5.5, sterilizing, adding a urea solution and a basic nutrient solution, and uniformly mixing to obtain slurry; aspergillus niger and saccharomycopsis fibuligera are mixed according to the spore number ratio of 100: 1, then sterile water is added, the mixture is stirred to be uniform, and bacterial liquid with the spore concentration of 1 * 10 < 7 >-5 * 10 < 7 > / mL is obtained; spraying the bacterial liquid to the surface of the slurry, performing aerobic culture for 40-48 hours under the conditions that the temperature is 30-35 DEG C and the humidity is 80-85%, then cooling to 25-30 DEG C, reducing the humidity to 70-75%, spraying methanol at the same time, and performing sealed culture for 5-6 days; performing drying; and the acid yield and the nutrient substance yield in the finally obtained fermentation product are obviously improved.

The invention provides an amylose content regulator and application thereof in improving the amylose content of wheat, and relates to the technical field of plant variety improvement. The amylose content regulator is mainly prepared from 24-brassinolide with the concentration of 0.2 to 25 [mu] g / L, abscisic acid with the concentration of 0.05 to 6.25 mg / L, zinc sulfate with the concentration of 0.1 to 1 wt% and boric acid with the concentration of 0.01 to 0.1 wt%. The invention also provides an application of the amylose content regulator in increasing the amylose content of wheat. The method specifically comprises the step of spraying the amylose content regulator on the surfaces of wheat plants in a wheat filling period so as to increase the amylose content of the wheat. The growth period of wheat is regulated and controlled through the amylose content regulator, so that the amylose content of the mature wheat seeds is increased, the method is easy and convenient to operate, and the amylose content of the treated mature seeds is increased by about 9%-16% compared with a contrast.

The invention belongs to the technical field of food processing, and provides a spina date seed peptide zinc chelate as well as a preparation method and application thereof. The spina date seed peptide zinc chelate is stable in performance and high in absorption efficiency. The preparation method comprises the following steps: degreasing a spina date seed medicinal material; preparing spina date seed protein; preparing spina date seed polypeptide; carrying out chelation reaction on the spina date seed polypeptide and zinc sulfate heptahydrate; and separating a chelation reaction product. The spina date seed peptide zinc chelate prepared by the invention can be directly used as a natural immunopotentiator to improve the immunity of a human body. The method has the advantages of short production cycle, low cost, no pollution to the environment, abundant nutrition, high protein content, small particle size, high safety and high utilization rate of effective components, and can be widely applied to the fields of foods, medicines and health care.

A toothpaste comprising: i) zinc sulfate heptahydrate; ii) glycine; iii) a silica abrasive; iv) greater than 20% by weight of water; wherein the weight ratio of zinc sulfate heptahydrate to glycine is 1: 3 to 2: 1.

The invention discloses a carbide slag fly ash concrete aerated block and a preparation method thereof, and belongs to the technical field of resource utilization of building materials and solid waste. The aerated block comprises the following raw materials: carbide slag, fly ash, gypsum, Portland cement, aluminum powder paste, a nano core-shell structure calcium-aluminum-silicon polymer and a zwitterionic foam-stabilizing polymer, the raw materials have a specific weight part range. Wherein the nano core-shell structure calcium-aluminum-silicon polymer is prepared by dispersing fly ash in water to form slurry, reacting the slurry with sodium silicate and a sodium metaaluminate solution in sequence, then adding calcium nitrate and a zinc sulfate solution for continuous reaction, and carrying out separation, washing, drying and grinding; the zwitterionic foam-stabilizing polymer is prepared by polymerizing a monomer in a solvent, precipitating and separating out, quaternizing, activating carboxyl crosslinking, dialyzing and purifying, and freeze-drying. All the steps relate to process parameters such as dry mixing time, stirring time, curing temperature, pressure and time, and the performance of the aerated block is improved through component optimization and preparation process improvement.

The invention discloses application of a microelement complex in a feed additive, which comprises the following steps: mixing fresh kelp and water with the same mass as the fresh kelp, grinding and pulping to obtain kelp slurry, then adding compound enzyme into the kelp slurry, stirring and mixing uniformly, continuously adding boric acid and ammonium molybdate tetrahydrate under a magnetic field condition, stirring and mixing uniformly, and carrying out enzymolysis and chelation under an ultrasonic condition; sequentially adding zinc sulfate heptahydrate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, cobaltous sulfate heptahydrate and manganese sulfate tetrahydrate while stirring, carrying out chelation reaction under a magnetic field condition, and centrifuging to take supernatant, so as to obtain a seaweed chelating solution; then adding maltose into the seaweed chelating liquid, uniformly stirring and mixing, continuously adding sodium selenite, and carrying out chelation reaction under the condition of a high-voltage pulsed electric field; and finally, continuously adding a beta-calcium polymalate aqueous solution under a magnetic field condition, carrying out ultrasonic oscillation treatment, and carrying out spray drying to obtain a complex of trace elements. The obtained complex of the trace elements can be used for preparing a feed additive, raw material sources are safe, and the complex has an obvious promoting effect on animal growth.

The invention belongs to the field of electrochemical energy storage, and particularly relates to a water-based zinc ion battery electrolyte, a battery and a zinc negative electrode protection method of the battery, zinc negative electrode corrosion, hydrogen evolution reaction and dendritic crystal growth are effectively inhibited by regulating and controlling the electrolyte, changing a hydrogen bond network of the electrolyte and optimizing a zinc ion solvation structure, and the cycle life of the zinc negative electrode is prolonged. The solvent of the electrolyte is water, and the solute is zinc sulfate and shikimic acid. When the prepared electrolyte is used for assembling the zinc symmetric battery, the interface impedance is obviously reduced, the deposition morphology is optimized, the formation of dendritic crystals is inhibited, hydrogen evolution reaction and side reaction are inhibited, and the cycle life of a zinc negative electrode can be effectively prolonged.

The invention discloses a method for preparing high-purity zinc sulfide by using activated zinc oxide, which comprises the following specific steps: 1) adding activated zinc oxide into a dilute sulfuric acid solution, heating, stirring and filtering to prepare a zinc sulfate solution; (2) dropwise adding dilute sulphuric acid into the sodium sulfide solution, introducing N2 to pressurize, desulfurizing and dehydrating the generated mixed gas of hydrogen sulfide and N2, introducing the mixed gas into the bottom of the zinc sulfate solution to react while stirring, designing a container filled with zinc sulfate into three-stage series connection, after dropwise adding is finished, turning off N2, continuously stirring, after stirring is finished, standing to precipitate zinc, and then carrying out centrifugal suction filtration to obtain zinc sulfide; 3) adding deionized water to wash zinc sulfide to obtain a wet zinc sulfide product; 4, the wet zinc sulfide product is put into a vacuum drying furnace to be dried, then the dried zinc sulfide is crushed into powder through an N2 airflow crusher, and the industrial high-purity zinc sulphide is obtained.According to the method, the complicated process of zinc sulfate refining and sulfide purifying is omitted, and the generated zinc sulfide product is high in purity, few in impurity and extremely low in raw material loss.

The invention relates to the technical field of flocculating agents, and discloses a flocculating agent for high-concentration azo printing and dyeing wastewater, which is prepared from the following components in parts by weight: 4 to 5 parts of hydroxypropyl chitosan derivative, 2 to 3 parts of sodium silicate solution, 0.5 to 1 part of sulfuric acid, 2 to 3 parts of ferric sulfate solution, 1 to 3 parts of zinc sulfate solution, and 4 to 5 parts of polyaluminum chloride solution and composite antibacterial agent. The preparation method comprises the following steps: preparing a sodium silicate solution, slowly dropwise adding the sodium silicate solution into sulfuric acid, and activating to obtain a polysilicic acid solution; sequentially adding a ferric sulfate solution, a zinc sulfate solution and a 50-500mg / L polyaluminum chloride solution, and standing and curing to obtain the polysilicate ferric zinc aluminum flocculant. The preparation method comprises the following steps: firstly, preparing a polysilicate ferric zinc aluminum flocculant, then slowly adding a melamine solution, carrying out ultrasonic action to obtain a carbonitrided polysilicate ferric zinc aluminum flocculant, and carrying out carbonitriding treatment on the polysilicate ferric zinc aluminum flocculant combined with metal ions to delay gelation of the polysilicate flocculant, so that the polysilicate flocculant can be stored for a longer time.

The present invention discloses an organic salt capable of inhibiting side reactions such as dendrites and corrosion as an aqueous zinc ion battery electrolyte, wherein the aqueous zinc ion battery electrolyte comprises a zinc salt, deionized water and an organic salt additive; the zinc salt is zinc sulfate; and the organic salt additive is sodium tartrate or sodium citrate. The organic salt additive provided by the present invention can be adsorbed on the surface of zinc in the electrolyte, improve the interface environment between the zinc negative electrode and the electrolyte, and destroy the original solvation shell of the zinc ion, thereby inhibiting the occurrence of side reactions such as dendrites and corrosion, and ultimately extending the service life of the aqueous zinc ion battery and improving the cycle stability. In addition, the additive provided by the present invention has a wide range of sources and low cost, and the preparation method is green and environmentally friendly.