95 results about "Sodium bisulfate" patented technology

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The application provides a weathering steel surface rust layer stabilizing treatment agent for industrial atmospheric environment, and the chemical composition of the weathering steel surface rust layer stabilizing treatment agent is as follows in terms of mass fraction: 25-45% of acrylic resin, 2.0-6.0% of chromium sulfate, 3.0-8.0% of ferrous oxide, 2.0-6.0% of ferric oxide, 0.5-3.5% of copper sulfate, 0.3-1.5% of sodium bisulfite, 1.0-6.0% of sodium molybdate, 0.5-3.5% of nickel sulfate, 2.0-5.0% of potassium phosphate, 0.05-0.5% of surfactant, 0.05-0.5% of defoaming agent, 0.05-0.5% of dispersing agent, 0.05-0.5% of thickening agent, and the balance is water, wherein the amount of plasticizer added is 2-5% of the resin. The stabilizing treatment agent in the application can promote the weathering steel surface to form a stable and dense rust layer within 0.5-1 year after the surface of the weathering steel is treated before use.

The application discloses a kind of high-altitude area weathering bridge steel member rust layer stabilizing treatment agent and use method, mainly solve the rust layer of high-altitude area weathering bridge steel member is difficult to stabilize and surface rust layer color is not uniform, rust liquid flow and other problems.The stabilizing treatment agent is composed of fast rusting agent and rust layer stabilizer, the fast rusting agent is composed of ferric chloride, copper sulfate, hydrogen peroxide, ethylene glycol and deionized water, the rust layer stabilizer is composed of sodium polyphosphate, sodium bisulfite and methanol and deionized water.The treatment agent of the application is suitable for the harsh environment of low temperature, oxygen is rare, inorganic salt system treatment agent is prone to icing in high sea area, the surface of high-altitude area weathering bridge steel member after processing forms brown rust layer with uniform color, no rust liquid flow.The rust layer of weathering bridge steel member can be stabilized within 8 hours by using the application, the thickness of the rust layer after processing is greater than or equal to 50 μm, the surface rust layer color difference value ΔE of different parts of the component is less than or equal to 10, and the amount of surface rust layer of the component is greater than or equal to 15 g / m 2 .

The invention provides an environment-friendly low-chlorine wet strength agent and a preparation method and application thereof.The preparation method comprises the steps that adipic acid and tetraethylenepentamine are mixed and react for 2-6 h at the temperature of 170-190 DEG C, and a prepolymer is obtained; cooling the prepolymer to 120-140 DEG C, adding a modifier, carrying out a heat preservation reaction for 2-3 h, and adding deionized water to adjust the solid content to 55-65% so as to obtain a modified polyamide solution; adding a cationizing agent and epoxy chloropropane into the modified polyamide solution, heating to 65-75 DEG C, reacting, and adding acid to adjust the pH value to 2.5-4.5 when the viscosity of the system reaches 50-80 mPa.s; adding sodium hydrogen sulfite, and carrying out heat preservation reaction for 1-2 hours; and adding deionized water to adjust the solid content to 12-13%, thereby obtaining the environment-friendly low-chlorine wet strength agent. The specific modifier is adopted to modify a polyamide main chain, and the cationizing agent is introduced, so that the prepared wet strength agent not only can remarkably reduce the content of organic chlorine in a product, but also can improve the dry and wet strength, water resistance and folding resistance of paper. In addition, the product can also shorten the curing time of the paper.

The application discloses a kind of polymer oil displacement agent for carbonate fractured-vug type reservoir and preparation method thereof, step 1, with acetone and ethanol mixed solution as solvent, N, N-dimethylpropylene diamine, diethyl ether and perfluorinated nonanoic acid are added into acetone-ethanol mixed solution, after complete reaction, chloropropene is added, continue to react, after reaction is finished, solvent is removed by evaporation, to obtain fluorocarbon cation hydrophobic monomer CF-1;Step 2, white oil, emulsifier Span80 and Tween80 with mass ratio of 35-45:1-3:1-2 are mixed uniformly to obtain oil phase;AM, sodium p-styrenesulfonate and fluorocarbon cation hydrophobic monomer CF-1 are dissolved in deionized water, sodium bisulfite is added, and stirred uniformly to obtain aqueous solution;The aqueous solution is added to the oil phase to obtain a uniform emulsion, ammonium persulfate is added, and the polymer oil displacement agent is obtained by reaction. It has higher temperature resistance and salt resistance, and greatly reduces the adsorption of carbonate reservoir on the oil displacement agent.

An animal litter, process for preparing the animal litter, and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least one sorbent and a sulfate such as sodium bisulfate. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

The application relates to the technical field of oilfield chemicals, and discloses a temperature-resistant and salt-resistant cationic hydrophobic association polymer as well as a preparation method and application thereof. Components of the polymer are acrylamide, N,N-dimethyl-N-methyl acryloyloxyethyl-N-2-hydroxy-1-octadecylamino propyl ammonium chloride, ammonium persulfate, sodium bisulfite, a fatty alcohol polyoxyethylene ether and a solvent. The application chemically synthesizes specific amounts of acrylamide, N,N-dimethyl-N-methyl acryloyloxyethyl-N-2-hydroxy-1-octadecylamino propyl ammonium chloride, ammonium persulfate, sodium bisulfite and the fatty alcohol polyoxyethylene ether, and can prepare the polymer with high thickening efficiency. The polymer has good thickening performance, a small critical association concentration, excellent temperature resistance and salt resistance, and can be applied to unconventional oilfields. The product produced by the preparation method has low residual monomer content, the preparation process is simple, the cost is low, the operation is easy, the pollution is small, and the product is easy to be industrially produced.

This invention relates to the field of flocculant technology, and discloses a polyacrylamide flocculant for sludge treatment and its preparation process. The polyacrylamide flocculant for sludge treatment prepared by this invention comprises the following raw materials: water, modified starch, prepolymer, and bromoethane; the prepolymer includes butyl acrylate, water, sodium dodecyl sulfate, acrylamide, N,N-methylenebisacrylamide, glycidyl methacrylate, modified silica, ammonium persulfate, and sodium bisulfite; the modified silica includes vinyltriethoxysilane-modified nano silica; the modified starch includes corn starch, N,N'-(1,2-ethanediyl)bisaspartic acid, sodium alginate, water, sodium sulfate, and phosphorus oxychloride; the obtained polyacrylamide flocculant for sludge treatment has a high molecular weight hyperbranched structure and good flocculation effect.

The invention discloses a method for preparing chromic anhydride from a sodium chromate neutral solution, which comprises the following steps: transferring the sodium chromate neutral solution into a storage tank of an anode head tank by using a pump, adjusting the temperature, transferring a sodium hydroxide solution into a storage tank of a cathode head tank, and adjusting the temperature; overflowing the sodium chromate neutral solution after temperature regulation to an anode chamber of an electrolytic bath and then overflowing to an anode circulating tank, and overflowing the sodium hydroxide solution after temperature regulation to a cathode chamber of the electrolytic bath and then overflowing to a cathode circulating tank; electrifying a cathode plate and an anode plate of the electrolytic bath with direct current to start electrolysis; pumping out an anode solution after electrolysis, adding the anode solution into a reaction kettle after evaporation, adding concentrated sulfuric acid, heating and dehydrating, and standing in a clarifier until layering; the upper layer is sodium hydrogen sulfate, and the lower layer is chromic anhydride liquid, cooling and flaking to obtain the high-quality chromic anhydride. The method can effectively shorten the production period, greatly improve the production yield, reduce the labor intensity of workers, avoid high cost of an electrolytic method and avoid a large amount of byproduct chromium-containing sodium hydrogen sulfate of a sulfuric acid method, and is economical and practical.

This invention relates to the field of lithium-ion battery technology, specifically to a method for recycling aluminum metal from high-aluminum cathode material black powder in waste lithium batteries. The method includes: dry mixing the black powder with anhydrous sodium sulfate, acidifying with concentrated sulfuric acid, spraying with an aqueous sodium sulfate solution and adding sodium bisulfate monohydrate to obtain a pretreated material; after staged acidification and roasting, lithium is extracted by water leaching; the water leaching residue is leached under low-acid conditions; the low-acid leachate is precipitated with sodium fluoride to obtain cryolite; the post-aluminum precipitate is then treated with iron removal and pH adjustment to prepare a nickel-cobalt-manganese extraction pre-liquid. This invention, by controlling the distribution of sulfate ions on the aluminum surface and staged roasting, reduces the gas production and aluminum load during low-acid leaching, combined with the directional precipitation of aluminum using low-pH cryolite. This achieves efficient lithium recovery while significantly reducing the loss of nickel, cobalt, and manganese with the aluminum slag. Aluminum is recovered in the form of cryolite for high-value recovery, greatly improving resource utilization and process safety.

The present application relates to a kind of preparation methods of sodium bisulfite menadione, which is prepared by the reaction of 2-methyl-1,4-naphthoquinone and sodium bisulfite in the presence of K2O-MgO / Al2O3 as an aid in the mixed solution of organic solvent and water.The present application makes the conversion rate of raw materials >99% by introducing K2O-MgO / Al2O3 as an aid, the selectivity is greater than 95%, and can reduce the phenol, quinone impurities (content <800ppm) in the product.The process is simple, the reaction condition is mild, the process is stable, the purity of product is more than 98%, and the total yield is more than 94%.

The application belongs to the field of aquaculture, and particularly relates to an ammonia-nitrogen removing agent for aquaculture and a preparation method thereof. The ammonia-nitrogen removing agent is composed of the following components in parts by weight: organic chlorine 8-10 parts, peroxide 6-8 parts, oxygen supplier 0.2-0.5 parts, catalyst 0.5-1 part, pH regulator 2 parts, and stabilizer 4-5 parts. The organic chlorine is sodium dichloroisocyanurate and cyanuric chloride, or cyanuric chloride. The catalyst is ferrocene. The pH regulator is sodium bisulfate and phosphate, or phosphate. The stabilizer is anhydrous sodium sulfate and anhydrous magnesium sulfate, or anhydrous sodium sulfate and anhydrous magnesium chloride. The application slowly releases hypochlorous acid through organic precursors, and degrades ammonia-nitrogen in water by combining with the ammonium magnesium phosphate method, so that the concentration is controllable and the effective period is long. While the ammonia-nitrogen removing agent of the application efficiently degrades ammonia-nitrogen, the problem of excessively high initial effective chlorine concentration is avoided, and the safety and stability of the treatment process are significantly improved.

The invention provides a synthesis method of an acrylamide-hydroxyethyl methylacrylate binary polymer and application of the acrylamide-hydroxyethyl methylacrylate binary polymer in pyrite beneficiation. The method comprises the following steps: water-phase free radical copolymerization: dissolving acrylamide in deionized water, dropwise adding hydroxyethyl methylacrylate under the protection of an inert atmosphere, heating to 55-65 DEG C, then adding an ammonium persulfate-sodium hydrogen sulfite initiator into a mixed system in batches, carrying out a heat preservation reaction at 55-65 DEG C for 4-6 hours, adjusting the pH value of a product to 6.5-7.5 after the reaction is finished, and carrying out water-phase free radical copolymerization; the binary polymer is obtained. The prepared polymer is used as an inhibitor in ore pulp, when the dosage is 100-500 g / t according to the mass of treated ore and the pH value of the ore pulp is 6-9, the pyrite recovery rate can be effectively reduced, the pyrite removal effect is improved, meanwhile, the influence on target mineral flotation is small, and the method is suitable for industrial production. The method does not need an organic solvent, the condition is mild, the product performance is stable, the repeatability is good, and the method is suitable for industrial preparation and application.

This application provides a method for recycling lithium-aluminum-silicon glass waste, relating to the field of solid waste resource utilization. The method includes: mixing lithium-aluminum-silicon glass waste powder with additives, calcining to obtain a calcined material, wherein the additives include sodium and calcium salts, the sodium salt including at least one of sodium sulfate and sodium bisulfate, and the calcium salt including at least one of calcium sulfate and calcium bisulfate. The molar amount of calcium in the additives is more than 0.4 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste, and the molar amount of sodium is more than 0.9 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste. The calcined material is then mixed with a leaching agent for leaching. The lithium-containing leaching solution of this application contains few types and amounts of impurities, and high-purity lithium compounds can be prepared after simple impurity removal treatment. This enables efficient recovery and reuse of valuable elements in low-value lithium-aluminum-silicon glass waste, solving the environmental pollution problem caused by glass waste stockpiling and reducing space occupation.

Disclosed herein is a method for preparation of a disinfectant formulation, the method comprising steps of obtaining a chlorine dioxide (CIO2) solution by adding a predetermined quantity of sodium chlorite with a predetermined quantity of sodium bisulfate in a first container filled with water, keeping the first container closed for a predetermined period of time, dissolving a predetermined quantity of peracetic acid (PAA) in water in a second container, adding a predetermined quantity of benzalkonium chloride (BAC) to the solution in the second container, and mixing and stirring the solutions of the first and second container to obtain a disinfectant solution.

The application discloses a high-stability and low-irritation oxytetracycline long-acting injection and a preparation method thereof. 2+ EDTA-2Na and sodium formaldehyde bisulfite are coordinated to stabilize, and forsythia extract reduces irritation; the pH of the finished product is 8.2-8.8. The method comprises acid pre-coordination, pre-filtration, ultrafiltration, reduction and deoxygenation (dissolved oxygen is less than or equal to 2 ppm) and 0.22 mu m terminal sterile filtration. The application realizes long-term clarification and content stability under high loading, and inhibits metal catalytic oxidation and alkali-sensitive degradation.

The invention discloses an oral membrane for treating schizophrenia and a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations. The invention aims to solve the technical problems of low dissolution rate and disintegration speed, difficulty in swallowing, high medicine hiding probability of patients, easiness in variation of medicines, complex composition and preparation process and certain side effects. The technical scheme is as follows: 1) the oral film agent comprises an active drug component lonanserin, a film-forming composition copovidone, polyoxyethylene and sodium hydrogen sulfite and a plasticizer polyethylene glycol, and the oral film agent can be delivered in an amorphous solid dispersion form, so that the oral film agent can maintain a supersaturated state in an intestinal environment, inhibit devitrification and improve the bioavailability of the oral film agent; therefore, more consistent and stable system exposure is obtained; 2) the sodium hydrogen sulfite serving as an antioxidant can reduce impurities in related substances of the blonanserin film agent;

The application discloses a kind of polymeric quaternary phosphonium salt fungicides and its preparation method and application the method includes steps: S1, 3, 5-dihydroxyacetophenone, water, organic acid, organic phosphine reaction obtains intermediate product A;S2, brown intermediate product A is reacted in alcohol and halogenated hydrocarbon, and brown viscous product is obtained;S3, brown viscous product is dissolved in ester solvent, filtration is carried out, and the polymeric quaternary phosphonium salt fungicide monomer separated in filtrate is taken;S4, polymeric quaternary phosphonium salt fungicide monomer is added in water, and aqueous solution of potassium persulfate, aqueous solution of sodium bisulfite are sequentially added dropwise, and viscous liquid is obtained;S5, viscous liquid is filtered to obtain light yellow solid, and the light yellow solid is placed in oven and dried overnight, and polymeric quaternary phosphonium salt fungicide is obtained.The polymeric quaternary phosphonium salt fungicide of the application has killing effect on SRB, TGB and IB in oil-containing sewage, and has the advantages of low use concentration and high sterilization efficiency.

The invention discloses a cilnidipine injection and a preparation method thereof, and belongs to the technical field of medicines. The cilnidipine injection mainly comprises cilnidipine, a cosolvent, a solubilizer, a stabilizer, an osmotic pressure regulator and water for injection, wherein the cosolvent comprises one or more of polyethylene glycol 400, propylene glycol and ethanol; the solubilizer comprises Tween 80 and SDS (sodium dodecyl sulfate); the stabilizer comprises sodium pyrosulfite and sodium hydrogen sulfite. The cilnidipine injection prepared by the invention not only has the characteristics of high in-vivo bioavailability, good stability, small use amount of solubilizer, medication safety and the like, but also is simple in preparation process, convenient to operate, low in production cost and suitable for industrial large-scale production.

The present application relates to a levetiracetam oral solution. Specifically, the present application provides a levetiracetam oral solution comprising levetiracetam, sucralose, polyethylene glycol 400, glycerol, lactose, mannitol, sorbitol, hydroxyethyl cellulose, citric acid, disodium hydrogen phosphate, sodium bisulfite and water. The levetiracetam oral solution of the present application can effectively mask the bitter taste of levetiracetam and its residues, thereby having excellent oral compliance, and the levetiracetam oral solution has excellent stability to light, high temperature and high humidity, can be divided and packed in transparent containers, is convenient for storage and transportation, ensures quality safety, and guarantees medication safety.

The invention discloses a micromolecular oil-based gel breaker as well as a preparation method and application thereof, and belongs to the technical field of product oil pipeline maintenance. The micromolecular oil-based gel breaker is selected from one or two of the following effective components in parts by weight: 1-10 parts of triethanolamine, 1-10 parts of sodium persulfate, 1-10 parts of sodium hydrogen sulfate and 1-10 parts of sodium sulfite, and 80-100 parts of water is used as a solvent. Compared with the existing gel breaker, the small molecule oil-based gel breaker has the advantages that the gel breaking time is shortened by 30-50%, and the shortest time can reach 15 minutes; by using weak acid and weak base, the corrosion to the carbon steel pipeline is low; meanwhile, the gel breaker mainly aims at phosphate aluminum salt gel and alkyl phosphate gel left in the pipeline, depends on the acid-base effect and the oxidation-reduction effect to act respectively or achieve the chemical synergistic effect, the formula of the gel breaker can be selected according to actual requirements, and the pertinence is high; the gel breaker provided by the invention also has the advantages of excellent environmental friendliness and controllable cost.

The invention discloses a composition for inhibiting color change of a whitening agent based on troxerutin. The composition is prepared from the following core active components in parts by mass: 0.1 to 0.5 part of syringyl malonic acid diethyl hexyl ester, 0.01 to 0.05 part of pentaerythritol tetra (bis-tert-butyl hydroxy hydrocinnamic acid) ester, 0.5 to 2 parts of troxerutin liposome and 0.05 to 0.5 part of toxostat; the composition does not contain any one or more of sodium pyrosulfite, sodium sulfite and sodium hydrogen sulfite; sulfate components are not used in the whole process, all the components are cosmetic-grade safe raw materials, skin irritation tests prove that the composition has no obvious irritation to people with sensitive skin and is wide in applicable people coverage, and the pain point that a traditional inhibitor is not friendly to sensitive skin is solved.

According to the method, sodium sulfite and sodium pyrosulfite products are directly prepared by adding quicklime into sodium sulfate and mixed salt or mirabilite and introducing SO2 for double decomposition reaction, so that the technical problems of high alkali consumption and high energy consumption in the prior art are solved. At present, only a liquid sodium hydrogen sulfite product containing more impurities can be produced in the prior art, but the water content of the liquid sodium hydrogen sulfite is up to 60-65%, the liquid sodium hydrogen sulfite is inconvenient to store and transport, the use amount of the liquid sodium hydrogen sulfite is small, and the market application is less; however, direct preparation of high-purity anhydrous sodium sulfite or sodium pyrosulfite products by using liquid sodium hydrogen sulfite has the cost problems of high alkali consumption and high energy consumption, so that the preparation cost of sodium sulfite and sodium pyrosulfite is difficult to be high. If the use amount of alkali neutralization is reduced, the barrier that impurity ions such as calcium, magnesium and iron in the sodium sulfite and sodium metabisulfite products do not exceed the standard is difficult to overcome; sodium hydrogen sulfite is neutralized until the pH value is greater than or equal to 11.0, more than 99.0% of foreign ions can be removed, but alkali for neutralization accounts for 70.0-75.0% of the production cost of anhydrous sodium sulfite; therefore, the invention provides a process technical scheme for preparing sodium sulfite and sodium pyrosulfite with low cost and low energy consumption.

The invention relates to a preparation process of high-durability toughened glass with an anti-fingerprint function, which comprises the following steps: inserting glass into a toughened frame, and ultrasonically cleaning the glass; putting the tempering frame into a tempering cage and preheating, transferring the tempering cage to a tempering furnace for tempering after preheating, annealing after tempering the glass, transferring into a clear water tank for water decomposition treatment, and then carrying out ultrasonic cleaning to obtain tempered glass; after the tempered glass is preheated, the tempering cage is moved to a secondary tempering furnace to be tempered, annealing is conducted after tempering, the tempered glass is transferred into a clear water tank to be subjected to water decomposition treatment, and then ultrasonic cleaning is conducted to obtain secondary tempered glass; the formula of the secondary tempering molten salt comprises 88 wt%-94 wt% of potassium nitrate, 5 wt%-10 wt% of sodium nitrate, 0.8 wt%-1.5 wt% of fluoropolyether trimethoxy silane and 0.3 wt%-2.0 wt% of sodium hydrogen sulfate. According to the invention, fluoropolyether trimethoxysilane is introduced into a secondary tempering molten salt formula, and is chemically bonded with the glass surface to form a silicon-oxygen covalent bond, so that the hydrophobic and oleophobic properties and fingerprint adhesion resistance of the glass surface are enhanced, the weather resistance and durability of an anti-fingerprint layer are improved, and the synchronous improvement of the anti-fingerprint function and high durability is realized.

The invention relates to the technical field of coal mine dust prevention and control, in particular to a dual-network interpenetrating structure dust suppression material and a step-by-step polymerization dust suppression method in a coal seam. The dust suppression material is prepared from the following raw material components: hydroxypropyl methyl cellulose, hydroxypropyl acrylate, ammonium persulfate, acrylamide, N, N '-methylene bisacrylamide, sodium hydrogen sulfite, sodium dodecyl benzene sulfonate and deionized water, and the dust suppression material with the dual-network interpenetrating structure comprises a flexible network and a rigid network, the flexible network is a grafted product of hydroxypropyl methyl cellulose and hydroxypropyl acrylate, and the rigid network is polyacrylamide. Amido groups in the rigid network can further improve the adsorbability to dust, meanwhile, the rigid network and the flexible network form a double-network interpenetrating structure, so that the material has high water-retaining property, the double effects of chemical anchoring and physical wrapping on coal are achieved, the dust production rate in the mining process is reduced, dust production is reduced from the source, and the mining efficiency is improved. And long-acting dust suppression is achieved, and dust generated in the coal crushing process is reduced.

The invention relates to the technical field of peptide extraction, in particular to sipunculus nudus peptide and an extraction method and application thereof. According to the specific technical scheme, the method comprises the following steps: 1) crushing a sipunculus nudus raw material, adding water, adding sodium hydrogen sulfite and ascorbic acid, and stirring and soaking for 10-15 minutes; 2) grinding the soaked raw materials, and adjusting the pH value of the slurry to be alkaline; (3) adding alkali enzyme into the slurry, carrying out microwave enzymolysis for 45-50 minutes, adding papaya peptidase B, continuously carrying out microwave enzymolysis for 45-50 minutes, heating, inactivating, cooling, carrying out centrifugal filtration, and collecting filtrate; and 4) sequentially carrying out microfiltration, ultrafiltration and sodium filtration on the obtained filtrate to obtain the product. Microwave radiation is adopted for assisting enzymolysis, energy can be provided for an enzymolysis system, the temperature needed by enzymolysis can be maintained, the enzymolysis efficiency is greatly improved, the prepared sipunculus nudus peptide can stabilize iron ions, a safe and efficient iron supplementing preparation can be developed, meanwhile, reproductive function decline caused by obesity can be comprehensively repaired, the advantage of multi-dimensional conditioning is achieved, and the sipunculus nudus peptide has a good application prospect. And the method is suitable for metabolism-related reproductive disorder treatment.

The application discloses a synthesis method of taurine and belongs to the technical field of organic chemistry. The surface amine modification of silica is realized by the reaction between the surface hydroxyl group of silica and the siloxane containing an amine group, a new sulfonation catalyst is prepared, the weak alkaline environment provided by the exposed amino group better satisfies the sulfonation system of acrylamide and sodium bisulfite, a large number of hydroxyl groups on the surface of the silica particles are beneficial to the dispersion in water, the sulfonation efficiency is improved, and the silica particles are easy to separate from the sulfonation system.

The application discloses a preparation method of a chitosan-based injectable self-healing hydrogel, and the method comprises the following steps: adding a sodium hyaluronate solution or a mixed solution of sodium hyaluronate and sodium bisulfate into a chitosan acetic acid solution drop by drop while stirring, performing suction filtration and flushing after the dropping is completed, and obtaining an initial hydrogel; pre-freezing the initial hydrogel, freeze-drying the initial hydrogel, grinding the freeze-dried hydrogel to obtain a freeze-dried gel powder; adding the freeze-dried gel powder into a solvent to prepare a sol, and obtaining a secondary hydrogel product after standing; the freeze-dried gel powder has good injectability in the secondary gelation process, and the obtained secondary hydrogel has self-healing property; the application solves the storage difficulty of general hydrogels, the prepared gel powder can be stored at room temperature for a long time, the secondary gelation process is simple to operate, the hydrogel has high biocompatibility and safety, and has a wide clinical application prospect.

The invention belongs to the field of aquaculture, and particularly relates to an ammonia nitrogen remover for aquaculture and a preparation method thereof. The ammonia nitrogen remover comprises the following components in parts by weight: 8-10 parts of organochlorine, 6-8 parts of peroxide, 0.2-0.5 part of an oxygen supply agent, 0.5-1 part of a catalyst, 2 parts of a pH regulator and 4-5 parts of a stabilizer, the organic chlorine is sodium dichloroisocyanurate and cyanuric chloride, or cyanuric chloride; the catalyst is ferrocene; the pH regulator is sodium hydrogen sulfate and phosphate or phosphate; the stabilizer is anhydrous sodium sulfate and anhydrous magnesium sulfate, or anhydrous sodium sulfate and anhydrous magnesium chloride. Hypochlorous acid is slowly released through the organic precursor, ammonia nitrogen in water is degraded in combination with a magnesium ammonium phosphate method, the concentration is controllable, and the validity period is long. According to the ammonia nitrogen remover, ammonia nitrogen is efficiently degraded, meanwhile, the problem that the initial available chlorine concentration is too high is avoided, and the safety and stability of the treatment process are remarkably improved.