43 results about "Potassium bisulfate" patented technology

The invention discloses a tetracycline hydrochloride-containing wastewater treatment method in the field of wastewater treatment, which comprises the following steps: introducing tetracycline hydrochloride-containing wastewater into a reactor, adding a multilevel structure iron and iron sulfide composite carbon material, and adjusting the system to a nearly neutral condition; then adding potassium peroxymonosulfate composite salt, starting a direct current system, and carrying out catalytic degradation reaction under specific current density; and finally recovering the catalyst through magnetic field separation. The preparation method comprises the following steps: grinding pyrite and hematite, ball-milling and mixing the ground pyrite and hematite with orange peel powder and sodium hydroxide, and carrying out microwave pyrolysis, acid washing and drying, hydrogen peroxide surface treatment and the like to obtain a final product. According to the method, efficient degradation of tetracycline hydrochloride under the neutral condition is achieved, the catalyst can be magnetically recycled, secondary pollution is avoided, and the method has the advantages of being low in cost, easy and convenient to operate, environmentally friendly and the like.

The invention provides a method for preparing high-purity acrylate by removing trace impurity aldehyde, which comprises the following steps: mixing crude acrylate with a polymerization inhibitor to form an organic phase; adding an aqueous solution of a dealdehyding agent into the organic phase to form an oil-water two-phase system; the oil-water two-phase system is forcibly stirred for 0.1-2.0 hours at the temperature of 20-40 DEG C, so that the impurity aldehyde and the dealdehyding agent are subjected to nucleophilic addition reaction, and a generated aldehyde-dealdehyding agent addition product is dissolved in a water phase; standing and layering the reacted material, separating and removing a water phase to obtain an organic phase without impurities; carrying out reduced pressure rectification on the organic phase after impurity removal to obtain a high-purity acrylate product with the total aldehyde content lower than 50ppm; wherein the aldehyde removing agent is sodium hydrogen sulfite, potassium hydrogen sulfite, calcium hydrogen sulfite, ammonium hydrogen sulfite or a mixture of any two or more of the sodium hydrogen sulfite, the potassium hydrogen sulfite, the calcium hydrogen sulfite and the ammonium hydrogen sulfite. The method is efficient, economical, free of solid deposition and easy for industrial continuous operation.

The application discloses a kind of water-soluble sulphur-based compound fertilizer preparation method, belong to compound fertilizer technical field.The steps include as follows:(1) in reaction kettle, concentrated sulfuric acid and potassium chloride are reacted under heating condition, reaction temperature is 105-115 DEG C, reaction time is 25-45 minutes, slurry is sent to cooling kettle;(2) in cooling kettle, temperature is reduced to 40-60 DEG C, slurry is sent to mixed acid tank;(3) in mixed acid tank, add dilute phosphoric acid, potassium bisulfate solution and slurry, reaction temperature is 65-75 DEG C, slurry is sent to tubular reactor;(4) in tubular reactor, add ammonia, washing liquid and slurry, reaction temperature is 150-180 DEG C, slurry is sent to granulator;(5) in granulator, add alkaline compound fertilizer raw material, return material and slurry for granulation, granulation temperature is 80-95 DEG C, return material ratio is 1:1.5-2.0;(6) the granules obtained from granulator are cooled and screened to obtain product.

The invention discloses an HPCACM-coated Co3O4 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing rice straw source cellulose; preparing rice straw source cellulose acetate (CA); preparing a hollow porous cellulose acetate fiber membrane (HPCAFM); preparing a hollow porous cellulose acetate derived carbon fiber membrane (HPCACM); and preparing the HPCACM-coated Co3O4 composite material. The prepared HPCACM-coated Co3O4 composite material is prepared based on straw, has a high specific surface area and a unique micro-mesoporous hierarchical structure, provides a rich active interface for a catalytic reaction, is beneficial to promoting mass transfer of reactants and products, efficiently activates potassium hydrogen persulfate, realizes high-value utilization of agricultural wastes, and improves the water pollution treatment efficiency.

The invention relates to the technical field of cleaning tablets, and provides a multi-effect cleaning tablet for a kitchen waste processor and a preparation method of the multi-effect cleaning tablet. The multi-effect cleaning tablet comprises a foaming cleaning layer, an oxidation sterilization layer and a deep decomposition layer, the foaming cleaning layer is arranged on one side of the oxidation sterilization layer, the deep decomposition layer is arranged on the opposite side of the oxidation sterilization layer, and the foaming cleaning layer comprises sodium bicarbonate, gluconic acid-delta-lactone, alkyl glycoside, limonene and a chelating agent; the oxidation sterilization layer comprises sodium percarbonate, potassium hydrogen peroxysulfate, potassium carbonate, sodium citrate and a stabilizer; the deep decomposition layer comprises biological enzyme. Gluconic acid-delta-lactone is adopted in the foaming cleaning layer of the multi-effect cleaning tablet to generate gluconic acid, so that the system is prevented from instantly and violently turning over, a middle-layer peroxidation system is favorably released at a proper time, invalid decomposition is reduced, strong acid or violent pH fluctuation is prevented from permeating into an inner layer, the enzyme inactivation risk is reduced, the foaming process is mild, and the foaming effect is good. And the integral integrity of the tablet can be maintained.

The present application relates to a kind of carbonized iron and nitrogen coordination iron co-doped nitrogen and graphene carbon material and preparation method and application, with six hydrated ferric chloride as iron source, with chitin as nitrogen, carbon source. By simple one-step method, after mixing, calcination, grinding way, carbonized iron and nitrogen coordination iron co-doped nitrogen and graphene carbon material is synthesized.The material prepared by the present application presents two-dimensional layered structure, after adding potassium hydrogen peroxodisulfate oxidant, the material can completely remove the active pharmaceutical ingredient naphthyl in water in a short time.Naproxen.The synthesis method proposed in the present application is simple and easy to operate, and the material performance is excellent, which can provide a new design idea for nitrogen coordination iron nanomaterial supported by carbon material, and be applied to the remediation of contaminated water.

The utility model relates to the technical field of powder packaging, in particular to a powder dredging structure of potassium hydrogen persulfate compound powder filling equipment, which comprises filling pipes arranged at the lower ends of filling barrels and supplementing barrels, and the filling pipes are fixedly connected with the respective filling barrels or supplementing barrels through connecting parts; a scraping plate is slidably connected to the inner wall of the filling pipe, the top of the scraping plate is arranged in the connecting part, and a driving mechanism is further arranged in the connecting part and used for driving the scraping plate to rotate along the inner wall of the filling pipe. And a scraping plate is arranged in the filling pipe and is in sliding connection with the inner wall of the filling pipe. After filling is completed every time, the scraping plate rotates by a circle along the inner wall of the filling pipe, so that the potassium hydrogen sulfate compound powder remaining on the inner wall of the filling pipe can be effectively scraped off, and the potassium hydrogen sulfate compound powder falls into a potassium hydrogen sulfate compound powder packaging box. Not only is waste avoided, but also the problem of residual potassium hydrogen sulfate compound powder in the filling pipe is effectively solved, and meanwhile, the residual potassium hydrogen sulfate compound powder is prevented from drifting everywhere.

The invention provides a method for treating comprehensive wastewater by combining potassium ferrate with oxidation, and belongs to the field of industrial wastewater treatment. The method comprises three stages of wastewater pretreatment and treatment system starting, catalytic oxidation, solid-liquid separation and material regeneration, a Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheet material is combined with potassium hydrogen peroxymonosulfate, a sequencing batch reactor is used for catalytic oxidation treatment of comprehensive wastewater, and the Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheet is recycled after being separated and regenerated. According to the invention, the balance of selective adsorption and broad-spectrum oxidation is realized, the Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheets are used for targeted enrichment of specific pollutants, potassium hydrogen peroxymonosulfate and K2FeO4 are used for full-spectrum oxidation, full-chain treatment of comprehensive wastewater is realized, and the method is especially suitable for deep purification of industrial wastewater with complex components and high toxicity.

The invention discloses a method for degrading vomitoxin by potassium hydrogen peroxymonosulfate, which comprises the following steps: treating a mixture to obtain a bimetallic modified graphite phase carbon nitride catalyst; the mixture is prepared from urea, CuCl2 (copper chloride) and CoCl2. 6H2O (cobalt chloride); potassium hydrogen peroxymonosulfate is treated with the bimetallic modified graphite phase carbon nitride catalyst, and activated potassium hydrogen peroxymonosulfate is obtained; and degrading vomitoxin in the water body by using the activated potassium hydrogen peroxymonosulfate to obtain a water body degradation result. According to the method disclosed by the invention, the degradation efficiency of DON within 30 minutes can reach 100% under an electro-catalysis coupled PMS system, and the method has wide pH and complex matrix adaptability, is wide in application range, and can be stably and circularly used.

The invention discloses an S-NPK production system and method.The S-NPK production system comprises an acid mixing tank, a tubular reactor, a neutralizing tank, a granulation drying machine, a classifying screen and a crusher, potassium hydrogen sulfate and phosphoric acid are mixed in the acid mixing tank to prepare mixed acid, the mixed acid reacts with ammonia, then slurry is prepared in the neutralizing tank again, and then the mixed acid reacts with the ammonia to prepare the S-NPK. And spraying the slurry into a granulating and drying machine by using a slurry spray gun for granulating and drying, screening granular materials in the granulating and drying machine, and taking qualified materials after screening as a target product, namely S-NPK. According to the invention, potassium bisulfate with relatively low cost is used for replacing potassium sulfate with high energy consumption, pollution and selling price to produce chlorine-free high-concentration S-NPK, phosphoric acid and slurry do not need to be concentrated, the external return material ratio is low, the nutrient content is complete, the defects of single-nutrient or dual-nutrient fertilizer are overcome, the problem that the fertilizer application requirement of crops is not met is solved, the fertilizer application workload is reduced, the crop yield is increased, and the economic benefit is increased. The fertilizer application effect is improved.

The utility model relates to potassium hydrogen sulfate composite powder processing technical field, concretely relates to a kind of potassium hydrogen sulfate composite powder premixing mechanism, including support seat, the potassium hydrogen sulfate composite powder premixing mechanism further includes: cradle is rotationally arranged on the support seat, mixing tank is rotationally arranged in the cradle, the drive part for driving mixing tank autorotation, several helical blades are fixed in the mixing tank inside circumferentially uniformly, and the mixing area is formed by surrounding between adjacent two helical blades.The utility model can autorotate mixing tank under the driving of drive part after raw material is filled and tightened can cover, and cradle is reciprocatingly deflected along mixing tank axial under the driving of reciprocating driving element, so that raw material flows, rolls mixing in mixing tank, greatly weaken the collision, vibration degree in mixing process of raw material, improve mixing effect.

The application discloses a preparation method of high-purity fluorescein sodium. The fluorescein is synthesized from o-phthalic anhydride and resorcinol under the catalysis of sodium bisulfate or potassium bisulfate without using an organic solvent as a solvent, and then the fluorescein is used to prepare fluorescein diacetate; and the high-purity fluorescein sodium is obtained through a synthesis route of saponification, acidification and salt formation. The synthesis route has mild reaction conditions, simple operation steps, no organic solvent, avoids the generation of organic solvent pollution, has low raw material and auxiliary material consumption, low production cost, high purity of reactants and high yield.

The invention relates to the technical field of chemical methods, in particular to preparation of a Cu and Ni doped modified MIL-88A material and application of the Cu and Ni doped modified MIL-88A material in activating potassium hydrogen persulfate to degrade PFBS. The preparation method comprises the following steps: performing ultrasonic dispersion and dissolution on fumaric acid, CuCl2. 2H2O, FeCl3. 6H2O and Ni (NO3.) 2.6 H2O, mixing, reacting at specific temperature and rotating speed, and washing and drying to obtain a product; the application comprises the following steps: preparing PMS and PFBS solutions, adding the modified material, and reacting under specific conditions. The problems that existing MIL-88A catalytic active sites are limited, and Fe < 3 + > / Fe < 2 + > valence state circulation conversion is slow are solved.

The invention provides a high-potential potassium hydrogen persulfate substrate modified sheet and a preparation method thereof, and relates to the field of substrate modified sheets. Comprising the following components in parts by weight: 10-30 parts of potassium hydrogen persulfate composite salt, 2-3 parts of potassium hydrogen sulfate, 2-5 parts of potassium sulfate, 1-3 parts of sodium chloride, 1-3 parts of polyethylene glycol 60001, 1-3 parts of polyvinylpyrrolidone, 1-3 parts of magnesium sulfate, 3-5 parts of lauryl sodium sulfate, 4-10 parts of sodium metaphosphate and 30-60 parts of sodium sulfate. The invention also provides a method for preparing the high-potential potassium hydrogen persulfate substrate modified sheet. According to the invention, slow dissolution of drugs in a water body is realized through an inclusion technology, active peroxy ions are continuously released, long-acting oxygenolysis of sediment organic matters is ensured, and the continuous demand of an aquaculture environment on sediment improvement is met.

The present invention provides a method for preparing an advanced oxidation catalyst from discarded saggers in the production process of lithium battery positive electrode materials. The method comprises: mechanically grinding the inner surface of the discarded saggers to obtain ceramic powder containing metal; using acid leaching to obtain an acid leaching solution and leaching residue containing metal ions; concentrating the acid leaching solution to obtain a concentrated solution; adding an auxiliary agent to the leaching residue, mixing and shaping it, and calcining it to obtain a catalyst carrier; then putting it into the concentrated solution for full impregnation and adsorption, taking it out to dry and lightly burn it, repeating the impregnation-drying-lightly burning process to obtain a catalyst precursor; and finally calcining it to obtain it. The process of the present invention is simple, highly feasible, low-cost, and easy to realize industrial preparation. It can fully realize the comprehensive utilization of transition metal elements and ceramic components in the discarded saggers, and obtain an advanced oxidation catalyst that efficiently catalyzes potassium permonosulfate to degrade organic pollutants. It is of great significance for the comprehensive and high-value utilization of discarded saggers in the positive electrode material industry and the development of industrial-grade advanced oxidation catalysts.

The application provides a high-potential potassium hydrogen persulfate bottom modification sheet and a preparation method thereof, relates to the field of bottom modification sheets, and comprises the following components in parts by weight: 10-30 parts of potassium hydrogen persulfate composite salt, 2-3 parts of potassium bisulfate, 2-5 parts of potassium sulfate, 1-3 parts of sodium chloride, 1-3 parts of polyethylene glycol 6000, 1-3 parts of polyvinylpyrrolidone, 1-3 parts of magnesium sulfate, 3-5 parts of sodium dodecyl sulfate, 4-10 parts of sodium metaphosphate and 30-60 parts of sodium sulfate. The application also provides a method for preparing the high-potential potassium hydrogen persulfate bottom modification sheet. The application realizes slow dissolution of the drug in water through inclusion technology, continuously releases active peroxide ions, ensures long-acting oxidation and decomposition of the organic matter in the bottom mud, and meets the sustainability requirement of the water product breeding environment for the bottom improvement.

The invention relates to the technical field of heating equipment for a potassium hydrogen persulfate drying machine, in particular to a heating system for a potassium hydrogen persulfate drying machine, which comprises a condenser, a compressor, a flow control valve, an evaporator, a liquid storage tank, an expansion valve, a three-way joint I and a three-way joint II, the liquid outlet end of the condenser is communicated with the liquid inlet end of the liquid storage tank, the liquid outlet end of the liquid storage tank is communicated with the liquid inlet end of the expansion valve, the liquid outlet end of the expansion valve is communicated with the liquid inlet end of the second three-way connector, and the liquid inlet end of the evaporator is communicated with one liquid outlet end of the second three-way connector. The liquid inlet end of the flow control valve is communicated with the other liquid outlet end of the second three-way connector. By designing two sets of heat exchange agent flowing paths, lubricating oil in the compressor is cooled synchronously in the heating and drying process, and the service life of the compressor is prolonged.

The utility model relates to the technical field of potassium hydrogen persulfate composite salt processing, in particular to a mixing, drying and feeding all-in-one machine for potassium hydrogen persulfate composite salt processing, which comprises a base, one side of the top of the base is fixedly connected with a support assembly and a feeding assembly which are arranged in a matched mode, and the bottom of the feeding assembly is provided with a feeding pipe in a matched mode. A stirring mechanism, a diffusion cover, a connecting cylinder and a drying box which are sequentially connected from bottom to top are fixedly connected to the other side of the top of the base, a drying assembly is fixedly arranged in the drying box, an outer box body is fixedly connected to the outer side of the drying box, and a discharging pipe is fixedly connected to the outer side of the stirring mechanism. The supporting frame is matched with the guide base to achieve the effect of supporting and lifting guiding of the whole feeding base, the effect of controlling the whole feeding base to conduct lifting adjustment is achieved through the driving mechanism, and the effect of storing external potassium hydrogen persulfate composite salt is achieved through the feeding base. And the effect of conveying the potassium hydrogen persulfate composite salt into the drying box is achieved through the feeding pipe.

The application discloses a preparation method of o-carboxybenzaldehyde, which comprises the following steps: S1, reacting a phthalide with a potassium hydrogen peroxysulfate complex salt and an alkali in a polar protic solvent to prepare an intermediate; S2, hydrolyzing the intermediate obtained in the step S1 by using a strong protic acid aqueous solution to obtain a product o-carboxybenzaldehyde; and S3, adjusting the pH of the product obtained in the step S2 to 3-4 by using a sodium hydroxide aqueous solution, quenching excessive potassium hydrogen peroxysulfate complex salt by using a saturated sodium sulfite solution, cooling, recrystallizing, filtering and vacuum drying to obtain a final product o-carboxybenzaldehyde. The preparation method of the o-carboxybenzaldehyde can effectively reduce the synthesis cost, avoids the use of dangerous and toxic reagents, effectively reduces the 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 discloses sulfur vacancy-rich MoS2 modified enteromorpha biochar and a preparation method and application thereof.The preparation method comprises the steps that enteromorpha powder is evenly dispersed in ultrapure water, potassium hydrogen peroxymonosulfate and ammonium molybdate are added for full reaction, after drying is conducted at the temperature of 60 DEG C, calcination is conducted under nitrogen atmosphere protection, and the sulfur vacancy-rich MoS2 modified enteromorpha biochar is obtained. The sulfur vacancy-rich MoS2 modified enteromorpha biochar obtained by the invention can reduce the concentration of tetracycline in a water body, reduce the content and mobility of tetracycline in sediments, does not need additional energy and oxidizing agents, and is simple in preparation process, low in production cost and suitable for large-scale production and application.

This invention provides a method for preparing high bulk density potassium peroxymonosulfate composite salt. Through multi-dimensional process optimization including multi-point feeding and neutralization, ultrasonic action, crystal guiding agent, heating-heating-heating-cooling, and drying-mixing-sieving, the bulk density of PMS is synergistically improved, and the overall performance of the final product is superior to that of the prior art.

The present application relates to a kind of ammonia content detection method in sulfurous acid-containing solution, belong to material detection technical field.The ammonia content detection method in sulfurous acid-containing solution of the present application, comprising the following steps: (1) adding potassium hydrogen persulfate to be measured sulfurous acid-containing ammonia solution and reacting with sulfurous acid, obtain the test solution;(2) using indigo phenol blue spectrophotometry to determine the ammonia content in the test solution obtained in step (1), i.e.the ammonia content in sulfurous acid-containing solution is obtained.The present application first adds oxidizing agent potassium hydrogen persulfate solution as pretreatment reagent, and reacts with sulfurous acid, eliminates sulfurous acid, while it will not produce interference factors affecting ammonia content determination.The ammonia concentration standard curve obtained by the test method of the present application, the R 2 of fitting curve has reached 0.999, which indicates that ammonia signal intensity and the concentration of standard solution have good linear relationship, further indicating that the ammonia content detection method of the present application has good detection reliability and accuracy.

The utility model relates to powder drying technical field, concretely relates to a kind of agitating mechanism for potassium hydrogen peroxodisulfate drying machine, including the stirring tank being located in the inside of drying machine, the stirring rod being located in the top of drying machine is driven by motor, the lower end of stirring rod is equipped with the helical blade that is inserted into the stirring tank, the top of stirring tank is open structure, the bottom of stirring tank is obliquely arranged, agitating mechanism further includes: the rack being located in the inside of drying machine;Lifting inclined plate being located in the lower end of stirring tank, lifting inclined plate is slidably arranged on the rack by guide rod, when using, by stirring rod drive helical blade rotation to continuously agitate potassium hydrogen peroxodisulfate material, simultaneously by drive portion drive lifting inclined plate continuously rotate, and reciprocating lifting action is carried out on the rack along guide rod, so as to realize that helical blade can agitate potassium hydrogen peroxodisulfate material in stirring tank in different positions, under the joint action of agitation and overturning crushing, guarantee consistency of drying.

The invention relates to the field of electrolytic etching, in particular to a low-pressure titanium alloy surface micropore etching solution which comprises the following components in parts by weight: 10-15 parts of organic acid, 5-10 parts of a PH stabilizer, 10-20 parts of a dispersing agent, 9-40 parts of an etching agent, 3-5 parts of an anisotropic modifier and 50-80 parts of a low-resistance solvent. Wherein the low-resistance solvent comprises water, propylene glycol, a voltage-reducing solvent, a voltage-reducing solute, an organic acid polymer and a small amount of a catalyst. The dielectric constant of the etching solution is reduced to the maximum extent and the conductivity is improved to the maximum extent by using a voltage-reducing solvent (R)-(+)-1-phenylethanol and voltage-reducing solutes ammonium sulfate and potassium hydrogen sulfate; the titanium oxide particles generated in the titanium etching process are dispersed while the breakdown voltage of the titanium anode film is reduced, the resistance of the interface of the titanium alloy and the etching solution is reduced, and the activation energy of the etching reaction is further reduced under the action of the catalyst 2-(aminomethyl) benzoic acid, so that the etching solution has a good pore-forming effect under the low-voltage condition.

This invention discloses a method for preparing a Zr-MOF catalyst containing a Co single-atom site, belonging to the field of metal-organic framework synthesis and advanced oxidation catalysis technology. First, mesoporous Zr-MOFs (NKM-508) are prepared via a solvothermal method using H4TCPB-CH3 ligand and ZrCl4. Based on NKM-508, N,O coordination sites are constructed through aspartic acid amino modification and salicylaldehyde Schiff base reaction, ultimately anchoring a Co single atom to obtain the NKM-508-Co catalyst. This catalyst exhibits good stability, can efficiently activate potassium persulfate (PMS) to generate reactive oxygen species, can rapidly degrade various azo dyes such as eosin Y, orange G, methylene blue, and rhodamine B, and demonstrates excellent recyclability.

The utility model relates to the technical field of production of potassium hydrogen persulfate effervescent tablets, in particular to a filling assembly of potassium hydrogen persulfate effervescent tablets, which comprises a filling table and a station cavity arranged at the top of the filling table, and further comprises a rotating wheel disc rotating in the station cavity, the driving part is used for driving the rotating wheel disc to intermittently deflect at a fixed angle, and the limiting parts are arranged on the rotating wheel disc in the circumferential direction. When a filling bottle at the bottom of the output end of the pneumatic conveying pipe is replaced by the station switching part, the driving wheel can be prevented from being in contact with other parts except the filling bottle, rolling friction can be formed between the filling bottle and the driving wheel, frictional wear between the driving wheel and the filling bottle is reduced, and the filling bottle is prevented from being damaged due to elastic pushing of the spring. The driving wheel can be kept in a good friction state with the filling bottle for a long time, and the problem that the driving wheel slips due to insufficient friction force caused by aggravated abrasion of the driving wheel is avoided.

This invention discloses a multifunctional potassium peroxymonosulfate composite effervescent tablet and its preparation method, belonging to the field of water treatment and disinfection formulation technology. The effervescent tablet is composed of potassium peroxymonosulfate composite salt, microencapsulated citric acid, a sodium bicarbonate / sodium carbonate mixture, sodium chloride, natural saponin extract, magnesium silicate-loaded hydrogen peroxide powder, polyvinyl alcohol-sodium alginate composite binder, magnesium stearate, and anhydrous sodium sulfate. By introducing pH-responsive microencapsulation technology to achieve gradient release of active ingredients, utilizing magnesium silicate-loaded hydrogen peroxide powder to achieve bottom flocculation and continuous oxygenation, and employing natural saponins to enhance biofilm penetration. This invention effectively solves the problems of excessively rapid release, high pH sensitivity, and lack of targeting in existing potassium peroxymonosulfate effervescent tablets, significantly extending the effective action time and improving the sterilization, algae removal, and water quality improvement effects. It is suitable for various scenarios such as aquaculture water bodies, landscape lakes, and emergency disinfection.

The invention discloses a preparation method and application of 2-chloro-1, 1, 1-trimethoxyethane, and the preparation method comprises the following steps: trimethyl orthoacetate, hydrogen chloride and potassium hydrogen peroxysulfate composite salt are mixed for reaction to obtain a mixture containing 2-chloro-1, 1, 1-trimethoxyethane.

A production method of a sulfur-based guniting nitrate-nitrogen-containing synergistic compound fertilizer belongs to the field of compound fertilizers, and comprises the following steps: step 1, heating potassium chloride and 93% concentrated sulfuric acid in a two-stage reaction tank by introducing steam, and carrying out a low-temperature reaction on a mixed liquid phase to obtain a potassium hydrogen sulfate solution; uniformly mixing the potassium hydrogen sulfate solution and phosphoric acid to obtain mixed acid, and introducing the mixed acid and ammonia gas into the tubular reactor in proportion for neutralization reaction to generate mixed slurry containing ammonium phosphate, potassium sulfate and the like; 2, spraying the mixed slurry into a flash tank for flash evaporation and cooling, concentrating, flowing into a mixing tank, and mixing with an ammonium nitrate solution and a fertilizer synergist which are added in proportion to obtain compound fertilizer slurry; spraying the compound fertilizer slurry into a granulator to obtain a granular compound fertilizer, and screening and drying the granular compound fertilizer to obtain the synergistic nitrate nitrogen-containing water-soluble sulfur-based compound fertilizer. The whole-process DCS operation control is realized, the automation degree is high, the product quality is stable and reliable, and the production environment is good.

The invention relates to the field of pesticides, and discloses a preparation method of azoxystrobin, which comprises the following steps: 1) reacting 3-(alpha-methoxyl)-methylene benzofuran-2 (3H)-ketone with alkali in the presence of a solvent to obtain a mixed solution, and removing the solvent to obtain an intermediate a; 2) in the presence of potassium hydrogen sulfate, carrying out transposition reaction on the intermediate to obtain an intermediate b; 3) reacting 2-cyanophenol with alkali in the presence of a solvent and a catalyst to obtain a mixed solution; 4) in the presence of triethylene diamine, adding the intermediate b into the mixed solution, and dropwise adding a solvent solution of 4, 6-dichloropyrimidine for reaction to obtain azoxystrobin, The preparation method of azoxystrobin has the advantages of simple reaction route, high selectivity and conversion rate, few impurities, no wastewater, no CO2 generation, and good industrial application value.