783 results about "Potassium sulfate" patented technology

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention provides a special charcoal-based slow-release fertilizer for sandy soil as well as a preparation method and application thereof, and belongs to the technical field of fertilizers. The special charcoal-based slow-release fertilizer for the sandy soil is prepared from amino modified biomass charcoal, urea, urea formaldehyde, monoammonium phosphate, potassium sulfate, polyglutamic acid, fulvic acid, clay, attapulgite, a compound microbial agent and sodium alginate. The compound microbial agent is prepared from halomonas (ACCC 11681), bacillus subtilis (ACCC 60429) and bacillus mucilaginosus (ACCC 10094), and the compound microbial agent is prepared from bacillus subtilis (ACCC 60429) and bacillus mucilaginosus (ACCC 10094). The invention further provides a preparation method and application of the special charcoal-based slow-release fertilizer for the sandy soil. The special charcoal-based slow-release fertilizer for the sandy soil can remarkably improve the water and fertilizer retention capacity of the sandy soil, improve the farmland productivity of the sandy soil, save fertilizer and water input and improve the yield and quality of crops.

The invention discloses a potassium fulvate chelated macroelement water-soluble fertilizer with stress resistance and growth promotion functions, and relates to the technical field of water-soluble fertilizers, the potassium fulvate chelated macroelement water-soluble fertilizer comprises the following raw materials by weight: 167-210 parts of mineral source potassium fulvate, 450-460 parts of potassium nitrate, 300-310 parts of urea, 150-160 parts of potassium dihydrogen phosphate, 30-40 parts of potassium sulfate, 15-25 parts of EDTA-disodium, and 5-15 parts of citric acid. 0.5 to 1.5 parts of brassinolide and 4 to 6 parts of polyaspartic acid; according to the potassium fulvate chelated macroelement water-soluble fertilizer with the stress-resistant and growth-promoting functions, through chelation cooperation of potassium fulvate and nitrogen, phosphorus and potassium, the solubility of the chelated phosphorus element in water is increased, and the chelated phosphorus element can be more uniformly distributed in soil; by adopting an EDTA-disodium and citric acid composite chelating system, volatilization and loss of nitrogen elements are reduced, the problem of precipitation of calcium, magnesium and phosphorus is solved, and the soil conditioner is suitable for hard water areas and especially has outstanding performance in saline-alkali soil and arid areas.

The invention discloses a high-RAP-doping-amount cold-mixed asphalt regenerant, and particularly relates to the technical field of asphalt regenerant, the high-RAP-doping-amount cold-mixed asphalt regenerant comprises the following raw materials: hydrogenated extract oil, acetyl tributyl citrate, a low-temperature penetrant, pre-swelling SEBS master batch, a crosslinking catalyst and a microcapsule antioxidant. Molecular-level branched-chain alkyl sodium sulfonate can be wedged into aged asphalt microcracks at the temperature of 65 DEG C, lost light components are balanced and supplemented through hydrogenated extract oil, an SEBS micro-crosslinking network forms an in-situ reinforcement effect at the temperature of 90 DEG C, the triple regeneration effect of regenerated asphalt is achieved, and the service life of the regenerated asphalt is prolonged. Nano-zinc oxide is treated by a silane coupling agent and then is modified by using methyl methacrylate and potassium persulfate, so that the nano-zinc oxide is coated with polymethyl methacrylate, the compatibility of the microcapsule antioxidant and the recycled asphalt can be improved, and the anti-aging performance of the recycled asphalt is improved.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention provides a modified chitosan flocculant for slime water treatment. The modified chitosan flocculant is prepared from the following raw materials: chitosan, dimethyl diallyl ammonium chloride, acrylamide, acetic acid and potassium persulfate. The invention also provides a preparation method of the modified chitosan flocculant for slime water treatment. The preparation method comprises the following steps: dissolving chitosan in a dilute acetic acid solution with the mass concentration of 60%, and stirring; adding acrylamide and dimethyl propyl chloride cyclic amine into the mixed solution, uniformly stirring, adding a potassium persulfate solution with the mass concentration of 4%, and introducing nitrogen for 20 minutes; then carrying out microwave reaction, and cooling to room temperature after the reaction is completed; adding absolute ethyl alcohol, centrifuging for 10 minutes, taking out, and continuously soaking in absolute ethyl alcohol for 12 hours, so as to obtain a final insoluble substance which is a graft polymer CS-g-ADM; and drying the polymer in a drying box at 105 DEG C until no weight loss occurs, and then grinding and storing. The flocculating agent disclosed by the invention has relatively good flocculability.

The invention discloses a biomass-inorganic-organic ternary composite flocculant and a preparation method and application thereof, and belongs to the field of coking wastewater treatment.The preparation method comprises the steps that chitosan serves as a substrate material, glutaraldehyde serves as a cross-linking agent, and polyferric sulfate (PFS) and chitosan are subjected to chemical cross-linking to generate an intermediate product PFS and chitosan composite particles; then potassium persulfate is used as an initiator, graft copolymerization of acrylamide and methacryloyloxyethyl trimethyl ammonium chloride is initiated through hydroxyl on the surface of PFS-chitosan, a cationic branched chain is introduced, and a final product is obtained. Through multi-component cooperation and structural design, the defects that a traditional flocculating agent is not thorough in demulsification, large in sludge amount, unstable in floc combination and the like in coking wastewater treatment are overcome, and the flocculating agent is particularly suitable for treating oil pollutants in coking wastewater.

The invention provides a pharmaceutical wastewater treatment process. The pharmaceutical wastewater treatment process comprises the following steps: A1, pretreatment, A2, adsorption treatment, A3, oxidation treatment and A4, filtration treatment. In the step A2, a composite adsorbent comprising the following raw materials: attapulgite, activated carbon, carbon nanotubes, 4-carboxyphenylboronic acid, polyethyleneimine, sodium dithiocarbamate, epoxy resin E-44, deionized water and modified nano zero-valent iron is used, and self-repairing is realized through dynamic chemical bonds such as boric acid ester bonds, imine bonds and thiol-disulfide bonds; the adsorbent can be self-repaired during microscopic damage, so that the service life is prolonged, and relatively high adsorption capacity is kept. In the step A3, a gel microsphere oxidant comprising the following raw materials: hydrogen peroxide, potassium persulfate, copper-iron sulfide, nitrogen-doped carbon quantum dots, sodium alginate powder, sodium polyacrylate and a phosphate buffer solution is used, and efficient degradation is realized through a synergistic mechanism of free radical oxidation, non-free radical oxidation and photocatalysis.

The invention provides a high-quality potassium hydroxide refining and impurity removal process, belongs to the field of potassium hydroxide impurity removal, and aims to overcome the defect that the purity of a potassium hydroxide product is reduced due to defects in removal precision and process stability during potassium hydroxide impurity removal in the prior art. The method comprises the following steps: carrying out oxidation decomposition on organic matters and precipitating calcium and magnesium ions, carrying out coarse filtration to remove large-particle impurities, carrying out graded filtration by adopting a three-stage series inorganic membrane module, carrying out efficient interception on impurities with different particle sizes by accurately controlling the pressure, temperature and flow rate of each membrane layer, and carrying out hydrochloric acid neutralization and potassium sulfite dechlorination to optimize the indexes of the brine. And finally, trace calcium and magnesium ions are deeply removed by utilizing the selective adsorption characteristics of the chelate resin and the strong acid cation resin, and after the resin is saturated, the resin is eluted, regenerated and recycled through acid and alkali with specific concentration, so that the impurity removal effect of potassium hydroxide is improved.

Described herein are compositions comprising a polymer / plastic carrier and potassium metabisulphite for imparting antimicrobial activity to a plastic material. Methods for making the same, and uses of the same for microbial control, are also disclosed.

The invention discloses a special slow-release compound fertilizer for corn and a preparation method thereof, the special slow-release compound fertilizer comprises the following raw materials by weight: 30-40 parts of urea, 15-20 parts of ammonium sulfate, 20-25 parts of potassium sulfate, 15-25 parts of monoammonium phosphate, 2-3 parts of a seaweed extract, 0.5-1.5 parts of polyaspartic acid, 0.5-1.5 parts of trace elements, and 0.5-1 part of a slow-release agent, the slow-release agent comprises DMPP, the trace elements comprise zinc-boron-titanium citrate, and the slow-release agent comprises potassium sulfate, potassium sulfate, potassium sulfate, monoammonium phosphate, polyaspartic acid, zinc-boron-titanium citrate. The seaweed extract comprises chitosan. DMMP is added into the formula, so that stable supply of nitrogen and synergistic yield increase benefits are achieved; the chitosan, the titanium zinc borate citrate and the polyaspartic acid are added, so that the absorption efficiency of the root system is further improved, the robust growth of corn plants is promoted together, and the acre yield and the grain quality of the corn are effectively improved.

The present invention discloses a livestock and poultry manure biochar-based fertilizer, comprising the following raw materials in parts by weight: 10-42% of dilute protein solution and collagenase-modified livestock and poultry manure biochar, 20-40% of urea, 7-25% of diammonium phosphate, 7-24% of potassium chloride or potassium sulfate, 0.5-1% of modified starch, and 6-23% of bentonite. The livestock and poultry manure is selected from one of chicken manure, cow manure, and pig manure. After the biochar is modified with collagenase, the surface of the biochar has more phenolic hydroxyl groups, carboxyl groups, aldehyde groups, and hydroxyl functional groups, which are effective for NH4 + , PO4 3‑ , K + , has a stronger adsorption effect, collagenase modification makes the protein distribution more uniform, and the generated groups form a stable chemical bond with the biochar surface: it improves the dispersibility of the modified biochar in aqueous solution and reduces agglomeration; it has better chemical stability in acidic and alkaline environments.

The invention discloses a high-performance additive and a steel-slag-doped cementing material applied to the high-performance additive, and relates to the technical field of cementing materials. The high-performance additive is prepared from the following components in parts by weight: 0.5 to 1 part of calcium citrate, 1.5 to 2 parts of modified sodium alginate, 4 to 6 parts of modified diatomite and 0.01 to 0.03 part of potassium persulfate. The modified sodium alginate is prepared from the following raw materials: oxidized sodium alginate, 4-hydroxycinnamamide, aminated graphene and sodium sulfanilate. The raw materials of the modified diatomite comprise alkali lignin and aminated diatomite. The invention provides the high-performance additive which is applied to the binding material doped with the steel slag, so that the problems of low activity of the steel slag and single function of the traditional additive are solved, the comprehensive improvement of the performance of the binding material is also realized, and the binding material has environmental protection property and economic benefit.

The invention discloses a treatment method of a lithium extraction leachate and a production method of lithium carbonate, wherein the treatment method can be used for efficiently recycling an aluminum resource in the leachate. The treatment method of the lithium extraction leachate comprises the following steps that 100, potassium sulfate is added into the lithium extraction leachate, and first liquid is obtained after the potassium sulfate is dissolved; step 200, performing freezing crystallization and solid-liquid separation treatment on the first liquid to obtain crude alum and lithium extraction mother liquor; step 300, dissolving crude alum in a solvent to obtain a second liquid; step 400, performing freezing crystallization and solid-liquid separation treatment on the second liquid to obtain high-purity alum and filtered mother liquor; wherein at least one of the lithium ion concentration, the rubidium ion concentration and the cesium ion concentration in the filtered mother liquor serves as a monitoring object to be monitored, when the monitoring object is larger than or equal to a threshold value, the filtered mother liquor and the lithium extraction mother liquor are mixed, and when the monitoring object is smaller than the threshold value, the filtered mother liquor serves as a solvent of crude alum.

The invention relates to the technical field of waste drilling fluid treatment, and discloses a modifier for treating water-based drilling waste and a preparation method thereof.The modifier is prepared from, by weight, 30-40 parts of potassium persulfate, 10-25 parts of ferric trichloride, 20-40 parts of quaternary ammonium cationic polymer and 10-20 parts of magnetized modified attapulgite clay. According to the modifier for treating the water-based drilling waste, through the synergistic effect of all the components, an oxidation-catalysis-flocculation-magnetic separation four-stage synergistic treatment process is formed, the problem that gel breaking is not thorough in the water-based drilling waste treatment process is solved, the content of metal ions in a liquid phase after solid-liquid separation is reduced, and the water-based drilling waste treatment effect is improved. The water distribution requirement of the drilling fluid can be met under the condition that the liquid phase does not need to be further treated, the treatment process is simplified, and the cost is reduced.

The invention relates to a composite phase change cold storage material and a preparation method thereof. According to the technical scheme, 60-90 wt% of deionized water, 4-34 wt% of anhydrous sodium formate, 2-5 wt% of anhydrous potassium sulfate and 1-4 wt% of xanthan gum are evenly mixed and dispersed, and a phase change cold storage medium is prepared; the preparation method comprises the following steps: mixing 64-75wt% of absolute ethyl alcohol, 15-20wt% of deionized water, 9-12wt% of nitric acid solution and 1-4wt% of expanded graphite, and standing to obtain dispersion liquid I; uniformly mixing 60 to 70 weight percent of tetrabutyl titanate and 30 to 40 weight percent of absolute ethyl alcohol, so as to obtain dispersion liquid II; uniformly mixing 30-40wt% of the dispersion liquid II and 60-70wt% of the dispersion liquid I under the condition of 70-100 DEG C, filtering and drying to prepare the nano titanium dioxide coated expanded graphite; 30-40 wt% of expanded graphite wrapped by nanometer titanium dioxide and 60-70 wt% of a phase change cold storage medium are subjected to vacuum impregnation and compression molding, and the composite phase change cold storage material is prepared. The prepared product is high in heat conductivity, large in phase change latent heat value, small in supercooling degree and good in cycling stability.

The invention discloses a super absorbent material and side leakage prevention paper diapers, and belongs to the field of hygienic product materials. Comprising the following steps: cooling acrylic acid in an ice-water bath, and partially neutralizing the acrylic acid by using a sodium hydroxide solution; mixing potato starch with deionized water, and gelatinizing at high temperature to obtain gelatinized starch; mixing gelatinized starch, neutralized acrylic acid, potassium persulfate and deionized water; uniformly stirring under the protection of nitrogen, heating and carrying out graft copolymerization reaction to obtain a copolymer; adding modified silicon dioxide into the copolymer, and uniformly dispersing; then adding an oxetane compound, and carrying out a cross-linking reaction at a high temperature to obtain a super absorbent material; wherein the modified silicon dioxide has a porous structure, and nano-silver particles are loaded in pore walls. The super absorbent material disclosed by the invention effectively breaks through the gel blocking effect of the traditional high-molecular water-absorbent resin, has ultrahigh liquid absorption capacity and water locking capacity, and realizes slow-release long-acting bacteriostasis at the same time.

The invention discloses a salinity regulation and control seedling culture method for hibiscus syriacus, and belongs to the technical field of hibiscus syriacus seedling culture. The method comprises the following steps: (1) seed treatment; (2) preparing a substrate; (3) after sowing, culturing in a greenhouse; (4) transplanting and salinity control: a) when the seedlings grow to have 3-4 true leaves, transplanting the seedlings into a nutrition bag, adding 0.4-0.6 wt% of a microbial liquid into the matrix at the same time, the microbial liquid containing nitrogen-fixing bacteria Azobacter chrocococcus and phosphate-solubilizing bacteria Bacillus licheniformis, and the total number of viable bacteria being greater than or equal to 1 * 10 < 9 > CFU / mL; after transplanting, carrying out drip irrigation with brackish seawater, and spraying a 0.1% monopotassium phosphate solution on leaf surfaces every half a month for three times in total; b) directly carrying out drip irrigation on brackish seawater in the nutrition bag; and (5) outdoor cold-resistant treatment: 30 days before winter, spraying 0.2-0.5 L of 0.2-0.4 wt% potassium sulfate aqueous solution to leaf surfaces for each plant, spraying once every 6-8 days, and spraying 3-5 times in total. Through salinity gradient domestication and use of the microbial agent, the biomass loss rate of the hibiscus syriacus under the salinity of 0.5% is remarkably reduced, and the annual increment of the plant height is improved.

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.

The invention discloses a preparation method of a biochar-based bacterial fertilizer capable of relieving pepper phytophthora blight. The biochar-based bacterial fertilizer takes nutrient substances as an inner shell and beneficial microorganisms as an outer shell; the inner shell is prepared from the following components in percentage by mass: 21 to 32 percent of urea, 18 to 20 percent of monopotassium phosphate, 6 to 15 percent of potassium sulfate, 3 to 5 percent of humic acid, 3 to 8 percent of oxidized starch, 0 to 10 percent of kaolin, 0 to 10 percent of diatomite and 0 to 20 percent of charcoal; the shell is prepared from the following components in percentage by mass: 10 to 20 percent of biochar for adsorbing beneficial microorganisms and 3 to 8 percent of starch; the inner shell material and the outer shell material of the biochar-based bacterial fertilizer are uniformly mixed, 1% aminobutyric acid is sprayed for granulation, then the mixture is put into a drying oven to be dried at 45 DEG C, and finally a polyurethane coating agent is used for coating. The biochar-based bacterial fertilizer can improve the soil environment, increase the fertilizer utilization rate and reduce the occurrence of pepper phytophthora blight.

The invention discloses a water-soluble fertilizer containing humic acid. The water-soluble fertilizer comprises the following components in parts by weight: 5-8 parts of ammonium sulfate, 28-32 parts of calcium ammonium nitrate, 18-22 parts of monoammonium phosphate, 32-38 parts of potassium sulfate and 10-15 parts of modified potassium humate. The preparation method comprises the following steps: carrying out alkali extraction on modified humic acid obtained by modifying lignite to prepare modified potassium humate, adding the modified potassium humate into a fertilizer raw material, and granulating to prepare the humic acid-containing water-soluble fertilizer. The preparation process comprises the following steps: S1, crushing and sieving the ammonium sulfate, the calcium ammonium nitrate, the monoammonium phosphate and the potassium sulfate, adding the modified potassium humate into a granulator in proportion, and uniformly stirring to obtain a mixture; s2, urea and water are prepared into a solution according to the mass ratio of 1: 3; and S3, uniformly spraying the urea guniting solution prepared in S2 into the raw material layer, and stirring until liquid drops and powder are in full contact to form particles to prepare the fertilizer. The humic acid-containing water-soluble fertilizer produced by the invention has the advantages of high nutrient content, soil structure improvement, crop root growth promotion and yield increase.

The invention discloses a bacterial culture medium for producing algin through liquid fermentation. The bacterial culture medium contains triclosan and SDS (Sodium Dodecyl Sulfate). Tests show that the PIB culture medium added with triclosan and SDS can improve the capability of producing algin by PFAC-PAO1 liquid fermentation. Accordingly, the inventor develops innovative research of optimizing the culture medium, the ChinaYin culture medium is finally obtained, and the specific formula of the ChinaYin culture medium is as follows: 20g / L of tryptone, 1.4 g / L of magnesium chloride, 10g / L of potassium sulfate, 20mL / L of glycerol, 50mu g / mL of triclosan and 125mu g / mL of SDS (Sodium Dodecyl Sulfate). Researches show that by applying the culture medium, the polysaccharide yield is higher than that of a PIB culture medium and a USAYu culture medium, the yield in 48 hours is higher than that of 24 hours and 72 hours, the yield of algin powder obtained in each culture bottle can reach 8 g / L, and it is indicated that the ChinaYin culture medium has the potential of being industrially amplified to be used for fermentation production of bacterial algin.

The invention provides a water-soluble fertilizer and a compound fertilizer for promoting growth of oats in saline-alkali soil as well as a preparation method and application of the water-soluble fertilizer and the compound fertilizer, and belongs to the technical field of fertilizers and preparation thereof. The water-soluble fertilizer comprises the following components in parts by weight: 20-30 parts of urea, 25-35 parts of ammonium sulfate, 10-20 parts of ammonium polyphosphate, 40-50 parts of potassium sulfate and 5-15 parts of humic acid. The compound fertilizer comprises the water-soluble fertilizer and a seed embedding agent, the seed embedding medium is prepared from the following components in parts by weight: 0.5 to 1.5 parts of bacillus subtilis, 1 to 3 parts of plant lactobacillus, 3 to 5 parts of basophilic halomonas and 10 to 15 parts of kaolin. The components and contents of the water-soluble fertilizer meet the nutritional requirements of the oats in the growth and development period, and the growth of the oats in the saline-alkali soil is promoted. By adding the microbial agent, the pH and salt content of the saline-alkali soil are reduced, the salinization of the saline-alkali soil is improved, and the oat plant height, the overground plant quantity and the seed yield of the saline-alkali soil are obviously increased.

The invention discloses a clean, efficient and low-cost lithium extraction slag utilization method which comprises the following steps: mixing lithium extraction slag with a fluxing agent, and sequentially carrying out roasting treatment, solid-liquid separation treatment, aging treatment and water leaching treatment to obtain a second solid-liquid mixture; carrying out solid-liquid separation treatment on the second solid-liquid mixture to obtain a second filter residue and a second filtrate; performing carbon separation method treatment on the first filtrate to obtain a third solid-liquid mixture; carrying out solid-liquid separation treatment on the third solid-liquid mixture to obtain a third filter residue and a third filtrate; the main component of the second filter residue and the third filter residue is white carbon black; performing heat treatment on the second filtrate and the third filtrate to obtain a fourth solid-liquid mixture; performing solid-liquid separation treatment on the fourth solid-liquid mixture to obtain fourth filter residues and fourth filtrate; the main components of the fourth filter residue are aluminum hydroxide and ferric hydroxide; and separating the fourth filtrate to obtain a sodium sulfate crystal substance and a potassium sulfate crystal substance.

The invention discloses a planting and baking process suitable for Yunyan 87 tobacco leaves. According to the planting technology, basic fertilizer is applied through compound fertilizer, organic fertilizer and sesame cake fertilizer in one-time furrows, potash nitrate fertilizer, compound fertilizer and potash sulfate fertilizer are applied in stages, the soil structure is improved, the chemical component coordination of tobacco leaves is enhanced, synthesis and transportation of carbohydrates of the tobacco leaves can be promoted by last topdressing 60-65 days after transplanting, and the yield of the tobacco leaves is increased. According to the tobacco leaf baking process, the sugar content and quality of tobacco leaves are improved, meanwhile, the combustibility of the tobacco leaves is enhanced, a good foundation is laid for follow-up baking, the chemical components, the combustibility and the appearance quality of the tobacco leaves prepared through the tobacco leaf baking process are obviously improved, and the tobacco leaves at different parts are improved.

The present invention relates to a bioelectrochemical device for treating soy sauce wastewater and a preparation method thereof. The bioelectrochemical device comprises an anode chamber and a cathode chamber, wherein a columnar anode is disposed at the center of the anode chamber; a columnar cathode is disposed at the center of the cathode chamber; the space between the columnar anode and the anode chamber is filled with a modified conductive oxidizing filler; electroactive bacteria grow on the columnar anode and the modified conductive oxidizing filler, and the modified conductive oxidizing filler is metal-doped activated carbon. The metal-doped activated carbon is formed by mixing the activated carbon with a mixed solution of zinc sulfate and potassium sulfate, adsorbing the zinc sulfate and potassium sulfate onto the activated carbon, and then calcining the activated carbon to form corresponding metal oxides on the surface of the activated carbon. Due to the introduction of metallic potassium and metallic zinc, the metallic potassium and metallic zinc have electronic interaction and synergistic effects, thereby improving electronic conductivity and promoting degradation treatment of the soy sauce wastewater.

The invention discloses an anti-leaching nutrient slow-release synergistic compound fertilizer, and particularly discloses an anti-leaching nutrient slow-release synergistic compound fertilizer and a preparation method thereof. The compound fertilizer comprises the following components in parts by weight: 30-50 parts of urea particles, 15-25 parts of monoammonium phosphate, 20-30 parts of potassium sulfate, 2-5 parts of a slow-release synergistic coating agent, 1-3 parts of a bonding wrapping layer and 10-20 parts of a filling material. The slow-release synergistic coating agent comprises polyaspartic acid (PASP) and a composite inhibitor (a urease inhibitor and a nitrification inhibitor), and the bonding wrapping layer is made of a polyvinyl alcohol / sodium polyethylene acid-based cementing material. The preparation method comprises the following steps: mixing and granulating raw materials, carrying out primary coating (slow-release synergist), carrying out secondary coating (bonding a coating layer), and drying and screening. Through the synergistic effect of the double coating technology and the compound inhibitor, the nitrogen conversion and release are obviously delayed, the nutrient leaching loss is reduced by 20-40%, the fertilizer utilization rate is improved by 25-30%, and the compound fertilizer is suitable for high-temperature and rainy areas.

The application discloses a preparation method of urolithin A. The method uses urolithin B as a raw material, adopts potassium persulfate to perform Elbs oxidation under alkaline conditions, and obtains urolithin A. A reaction route is as follows: wherein, formula I is a chemical structural formula of urolithin B, and formula II is a chemical structural formula of urolithin A. The preparation method of urolithin A provided by the application effectively reduces a synthesis cost, avoids use of dangerous and toxic reagents, effectively reduces generation of industrial three wastes, and is simple in process, convenient in operation, low in raw material cost, high in yield, and beneficial to large-scale industrial production.

The invention relates to the technical field of improvement of coastal saline-alkali land, in particular to a soil conditioner for salt-control fertile soil of coastal fishery reclamation saline-alkali land and a preparation method of the soil conditioner. The invention relates to a soil conditioner for salt-control fertile soil of coastal fishery receding reclamation saline-alkali land. The soil conditioner comprises the following raw material components in parts by mass: 40-60 parts of urea, 25-45 parts of calcium superphosphate, 30-45 parts of potassium sulfate, 20-25 parts of modified oyster shell powder, 10-15 parts of humic acid, 3-5 parts of a compound microbial agent, 10-20 parts of desulfurized gypsum and 25-35 parts of a biochar composite material, the biochar composite material is prepared from the following raw material components in parts by mass: 1 to 2 parts of sodium alginate, 1 to 2 parts of chitosan, 3 to 8 parts of biochar, 1 to 5 parts of calcium chloride, 10 to 20 parts of tuff stone powder, 0.25 to 2 parts of acidified attapulgite, 0.01 to 0.08 part of graphene oxide, 1 to 5 parts of ferric nitrate, 0.6 to 3 parts of copper nitrate and 0.1 to 0.5 part of silane coupling agent. By adopting the soil conditioner prepared by the invention, the pH value of soil, the volume weight of the soil and the total amount of water-soluble salts can be remarkably reduced, meanwhile, the organic matters of the soil are increased, and the porosity of the soil is increased.

The utility model discloses a device for recovering and separating potassium and sodium salts generated in the process of extracting lithium from ore, which is characterized in that an outlet of a salt dissolving tank is connected with a freezing buffer tank, an outlet of the freezing buffer tank is connected with a freezing crystallizer, a freezing crystal slurry outlet is connected with a freezing thickener, and an outlet of the freezing thickener is connected with a freezing centrifuge; a refrigerated centrifugal solid phase outlet is connected with a hot melting tank, a bottom outlet of the hot melting tank is connected with an anhydrous sodium sulphate crystallizer, an anhydrous sodium sulphate crystal slurry outlet is connected with an anhydrous sodium sulphate thickener and an anhydrous sodium sulphate centrifuge, and a centrifugal solid phase outlet is connected with an anhydrous sodium sulphate discharge pipe; the centrifugal liquid phase outlet is connected with an anhydrous sodium sulphate mother liquor tank; a liquid phase outlet of the freezing centrifuge is connected with a freezing mother liquor tank, freezing mother liquor flows back and enters the potassium sulfate crystallizer, a potassium sulfate crystallization magma outlet is connected with the potassium sulfate thickener and the potassium sulfate centrifuge, and a potassium sulfate centrifugal solid phase outlet is connected with a potassium sulfate salt discharge pipe. The device can be used for separating the mixed salt into sodium sulfate with extremely high purity and potassium sulfate with relatively high purity, so that the product yield is improved.