504 results about "Sodium thiosulfate" patented technology

The invention discloses an organic plugging agent, a preparation method thereof and application of the organic plugging agent to inhibition of SAGD steam cavity edge water invasion. The organic plugging agent is prepared from the following raw materials: epoxy resin, a curing agent, nano aerogel, mineral fibers, plant fibers, a reactive diluent, a heat stabilizer and water, the epoxy resin is at least one of glycidyl amine epoxy resin and alicyclic epoxy resin; the curing agent is at least one of amino resin, dicyandiamide and hydrazide; the heat stabilizer is at least one of thiourea, sodium thiosulfate and cobalt chloride. The organic plugging agent is excellent in high temperature resistance, mineralization resistance and plugging performance, the organic plugging agent, nitrogen and an inorganic plugging agent are injected into a water plugging system of an SAGD steam cavity edge well in a slug mode, the organic plugging agent is applied to SAGD high-temperature and high-leakage well conditions, and the SAGD production effect can be effectively improved.

The invention provides a purification and impurity removal method of a crude nickel-cobalt-manganese sulfate solution. The purification and impurity removal method comprises the following steps: (1) adding sodium thiosulfate into the crude nickel-cobalt-manganese sulfate solution to remove copper; (2) phosphate is adopted, the pH value is regulated, and titanium, iron, aluminum and the like are removed; (3) ferric sulfate is added, the pH value is regulated, and phosphorus and silicon are removed; (4) adding a bismuth agent and regulating the pH value to remove chlorine; (5) adding a fluorine agent to remove calcium and magnesium; and (6) adding a tillite mineral adsorbent to remove fluorine. According to the method, iron, aluminum, copper, fluorine, phosphorus, titanium, calcium, magnesium, chlorine, silicon and other elements can be efficiently removed from the rough nickel-cobalt-manganese sulfate solution, the loss of main metal is low, the prepared high-purity nickel-cobalt-manganese sulfate solution can directly meet the requirement of a precursor solution of a battery preparation level, the process is simple, the operation difficulty is low, industrial large-scale production is easy to achieve, and the method is suitable for industrial production. And the defects of the current preparation method of the high-purity nickel-cobalt-manganese sulfate solution are overcome.

The invention relates to the technical field of sewage treatment, and discloses a novel sulfur autotrophic denitrification filter material and a preparation method and application thereof.The particle size of the filter material is 3.0-4.0 mm, and the filter material is prepared from 40%-45% of a composite sulfur source, 70 + / -2% of sulfur and 30 + / -2% of sodium thiosulfate, 30%-35% of modified ceramsite, 50-100 [mu] m / 200-300 [mu] m of bimodal pore size and 8%-10% of a conducting medium. The ratio of graphene to biochar is 3: 1), a buffer medium (5%-7%, Fe2O3 (52% + / -2%), CaCO3 (31% + / -2%) and MgO (17% + / -2%), a binder and an inert filler. The preparation method comprises the steps of raw material pretreatment, mixing granulation, stepped calcination, gradient impregnation, buffer medium directional loading, post-treatment and the like. The filter material solves the problems of by-product accumulation, insufficient microbial adhesion, large pH fluctuation and blockage of a traditional filter material through gradient sulfur release, a three-dimensional electron transfer network, a multistage pore anti-blockage design and a composite pH buffer system, is suitable for sewage denitrification treatment, and is high in denitrification efficiency and good in stability.

The invention belongs to the technical field of ceramic materials, and particularly relates to a high-strength building ceramic material and a preparation method thereof. The high-strength building ceramic material is prepared from the following raw materials in parts by weight: 20 to 30 parts of potassium feldspar, 15 to 23 parts of kaolin, 37 to 45 parts of solid waste-based silicon carbide, 1 to 4 parts of talc, 3 to 8 parts of modified mullite whisker and 2 to 5 parts of filler, a preparation process of the modified mullite crystal whiskers comprises the following steps: (1) adding mullite crystal whiskers into an ethanol water solution containing a silane coupling agent, and heating for reaction to obtain pretreated mullite crystal whiskers; and (2) adding the mullite whiskers pretreated in the step (1) into a nickel sulfate aqueous solution, then adding triethylamine and sodium thiosulfate, and carrying out a heating reaction to obtain the modified mullite whiskers. After the raw material components are combined, preparation of a high-strength ceramic material is facilitated, the heat conductivity coefficient can be increased, the heat conduction effect can be enhanced, and the ceramic material is suitable for common home decoration and high-heat-conductivity floor heating ceramic tiles.

The utility model discloses a crystallization stirring tank for sodium thiosulfate, and relates to the technical field of sodium thiosulfate production. Comprising a supporting frame, a charging barrel is fixedly connected to the supporting frame, a detachable cover is connected to the top end of the charging barrel, a fixing frame is fixedly connected to the cover, a motor is fixedly connected to the fixing frame, a rotating rod is fixedly connected to an output shaft of the motor, and a stirring rod is fixedly connected to the rotating rod. The connecting sleeves distributed at equal intervals are fixedly connected to the stirring rod, and stirring blades are rotationally connected to the connecting sleeves. The stirring rod and the stirring blades rotate to stir a solution, the stirring efficiency is improved, under the action of the clamping block and the spring, the stirring blades can rotate to adjust the angle, and the contact area with the solution is adjusted according to the stirring requirement, so that stirring is more uniform, the problems of crystal scaling and uneven particle distribution are reduced, and the crystal quality is improved.

The invention discloses a preparation method of an all-solid-state lithium-sulfur battery composite positive electrode, which comprises the following steps: weighing raw materials of sodium thiosulfate, hydrochloric acid and a conductive agent (such as one or more of graphene, carbon nanotubes, conductive carbon black and acetylene black) according to a certain proportion, stirring, precipitating, washing and drying to obtain a sulfur-carbon precursor; and performing mechanical ball milling on the precursor and an electrolyte according to a certain proportion, and grinding with a binder to obtain a composite positive electrode, and taking the composite positive electrode as the positive electrode of the all-solid-state lithium-sulfur battery. According to the invention, the problem of non-uniform lithium ion transmission caused by large particle size of active substance sulfur is solved, so that the utilization rate of the active substance is improved; meanwhile, the problem of non-uniform dispersion of the active substance sulfur and the conductive agent carbon is solved, so that the cycle stability of the battery is improved; in addition, the addition of the binder enhances the contact of each component in the composite positive electrode, thereby obtaining more excellent electrochemical performance.

The invention discloses a five-in-one composite sulfur autotrophic denitrification filter material as well as a preparation method and application thereof, and relates to the technical field of denitrification filter material preparation. The sulfur autotrophic denitrification filter material is prepared from polyethylene glycol, polyvinyl alcohol, sodium alginate, water, a sulfur autotrophic denitrification bacteria solution, elemental sulfur, biogas residue activated carbon, sodium thiosulfate, calcium chloride and boric acid. The invention also comprises a preparation method of the sulfur-based autotrophic denitrification filter material. According to the invention, a composite material based on nano modified graphene oxide is developed, a calcium carbonate material, pyrite, graphene oxide and denitrifying bacteria are adopted to prepare a granular composite autotrophic denitrification filter material with photocatalytic characteristics, and zero-valent iron and a biogas residue carbon micro-electrolysis material are combined; the GO + ZVI + biogas residue carbon + efficient denitrifying bacteria + photocatalysis five-in-one composite artificial wetland imitating type denitrification deep denitrification filter tank is constructed, the material cost is low, and the environmental pollution degree is small.

The invention discloses a lead-free phosphorus chemical nickel plating solution, and relates to the field of chemical nickel plating, and the lead-free phosphorus chemical nickel plating solution comprises the following components: 6-10 g / L of nickel salt, 5-10 g / L of a complexing agent, 1-5 g / L of a brightener, 5-12 g / L of a reducing agent, 0.6-0.9 g / L of a composite stabilizer, 2-10 g / L of a plating starting agent, 0.1-0.6 g / L of a hydrogen evolution preventing agent and 30-60 mg / L of a surfactant. The adopted plating starting agent is high in decomposition capacity, after the service cycle is increased to 4 MTO, the problem that decomposition products are accumulatively increased to a certain degree to cause blackening of a plating layer can be relieved, 5-6 MTO can be achieved, meanwhile, the adopted composite stabilizer is a composition composed of an aminopyrrole carboxylic ester compound and an aminothiazole carboxylic ester compound, and the composite stabilizer has the beneficial effects of being environmentally friendly and free of pollution. The stability of traditional elements such as lead and cadmium can be improved, and the problem that the service cycle of stabilizers such as benzotriazole or sodium thiosulfate is short can be solved.

The invention relates to a preparation method of 1-methyl-5-hydroxypyrazole, which comprises the following steps: (a) methylation reaction: fully dissolving pyrazole in a reaction solvent a, dropwise adding a methylation reagent into the reaction solvent a to carry out methylation reaction, adding water into the reaction solvent a to carry out quenching reaction after the reaction is completed, fully washing and concentrating to generate 1-methylpyrazole; (b) bromination hydrolysis reaction: fully dispersing 1-methylpyrazole in a reaction solvent b, dropwise adding bromine into the reaction solvent b to perform bromination reaction, dropwise adding liquid caustic soda and a sodium thiosulfate solution into the reaction solvent b to perform quenching reaction after the reaction is completed, adding the liquid caustic soda into the reaction solvent b after extraction and concentration, and performing heating hydrolysis and cooling crystallization to obtain the 1-methyl-5-hydroxypyrazole. The preparation method of the 1-methyl-5-hydroxypyrazole is reasonable in design, not only reduces the isomer 1-methyl-3-hydroxypyrazole, but also avoids the use of liquid with pungent smell, such as ethylenediamine, and precursor reagents, such as methylhydrazine, improves the operation safety, is environment-friendly, and is beneficial to industrial production.

The invention discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oil field fracturing fluids. When the high-temperature-resistant and salt-resistant fracturing fluid is prepared, sodium 3-chloro-2-hydroxypropane sulfonate, N, N-dimethylacrylamide and ethylene glycol react to prepare a quaternized solid product, and then the quaternized solid product reacts with 1-bromooctadecane to prepare an amphoteric hydrophobic monomer; guar gum powder reacts with 3-(1-naphthyloxy)-1, 2-epoxypropane to prepare naphthyloxy functionalized guar gum, and then the naphthyloxy functionalized guar gum, acrylamide and an amphoteric hydrophobic monomer are subjected to initiated polymerization through ceric ammonium nitrate to prepare modified guar gum; enabling zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethanediamine and glycerol to react to prepare an organic zirconium cross-linking agent; and finally, mixing the modified guar gum, an organic zirconium cross-linking agent, sodium thiosulfate, sodium bromate, a surfactant and water to prepare the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the invention has excellent high-temperature resistance and salt resistance.

A pharmaceutical composition comprising sitagliptin or a pharmaceutically acceptable salt thereof, wherein the composition comprises less than 5 ppm of 7-Nitroso-3-(trifluoromethyl)- 5,6,7,8-tetrahydr

The invention discloses a method for preparing a sodium-rich boundary-rich iron-based prussian blue analogue (FePBA) through one-step hydrothermal synthesis assisted by sodium thiosulfate. The method specifically comprises the following steps: preparing a solution A and a Na4Fe (I I) (CN) 6 solution; the molar ratio of ferrocyanide to Fe ions in the solution B is 3: 4. And preparing a solution B to react with ferrocyanide to form FePBA. Adding sodium citrate to form a sodium and citrate-rich environment, then adding ferric iron salt, and fully stirring to chelate the added Fe < 3 + > with the citrate; and adding sodium thiosulfate after the step. Preparing a PVP (Polyvinyl Pyrrolidone) solution to play roles in dispersing FePBA and reducing agglomeration, and taking the PVP solution as a solution C; slowly dropwise adding the solution A and the solution B into the solution C at a constant speed by using a rubber head dropper to finally obtain a precursor solution, carrying out hydrothermal reaction for 6 hours at 110 DEG C, carrying out suction filtration on the obtained precipitate, and drying to obtain a FePBA sample. According to the invention, the time required for synthesis is greatly shortened, and the traditional coprecipitation of more than 24 hours is improved into rapid hydrothermal reaction of 6 hours.

The present invention provides an autotrophic denitrification filter material, comprising three types of materials A, B, and C, and the weight ratio of each material is A: B: C = (10-15): (1-2): 1, wherein A is a composite denitrification ingredient, including ferrous sulfide, sulfur, sodium thiosulfate and iron powder; B is an adhesive; and C is a molecular sieve treated with a microbial culture solution. The high efficiency of the autotrophic denitrification filter material with high efficiency denitrification provided by the present invention is mainly based on the following two options: first, the filter material belongs to a multivalent composite sulfide-iron coupling denitrification scheme, and the diverse electron donors of the autotrophic denitrifying bacteria have synergistic synergy; second, the autotrophic denitrifying bacteria culture solution is pre-placed in the gap of the molecular sieve, which can be slowly released, ensuring that the autotrophic denitrifying bacteria can still maintain growth when the environment is subjected to various shocks. The autotrophic denitrification filter material provided by the present invention has a simple preparation process, is easy to operate during application, and can maintain high efficiency in denitrification capacity.

The invention discloses a sulfur-doped nickel-cobalt-iron layered double hydroxide nanosheet array catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, nickel foam is subjected to surface modification, a NiCo LDH nanosheet array evenly distributed grows on the surface of the nickel foam, then the nickel foam is soaked in a solution containing iron ions and sodium thiosulfate, and an S-NiCoFe LDH nanosheet array is obtained; and the nickel-cobalt-based self-supporting OER electrocatalyst is prepared. The electrode material has the advantages that the three-dimensional porous self-supporting electrode does not need an organic adhesive or a supporting electrode; the raw materials are non-noble metals, low in price and wide in source. The obtained nickel-cobalt-based self-supporting electrode material shows good OER performance in 1mol / L KOH, the overpotential of the catalyst at 100mA / cm < 2 > is 283mV, and after 48h stability test, the performance of the catalyst is not obviously attenuated.

The invention provides an accurate determination method applied to ammonia nitrogen in a complex water body, which comprises the following steps: adding a proper amount of ethylenediamine tetraacetic acid, silver nitrate, sodium potassium tartrate tetrahydrate and an indicator into a complex water body sample, carrying out primary heating distillation, adding a proper amount of sodium thiosulfate and an indicator, and carrying out secondary heating distillation; the method comprises the following steps: preparing ammonia nitrogen standard solutions with different ammonia nitrogen contents, combining with a Nessler reagent to determine absorbance, drawing a standard curve of mass and absorbance, finally detecting a sample to be detected after secondary distillation by the same method, determining absorbance, and obtaining the corresponding ammonia nitrogen content from the standard curve. According to the method, an appropriate masking agent is selected to be matched with a secondary distillation process, interference of urea, volatile amine, chloramine, sulfide, heavy metal and the like contained in the complex water body sample on ammonia nitrogen determination is masked, an appropriate mixed absorption liquid is selected, accurate determination of ammonia nitrogen in the complex water body is achieved, and the method has good precision and accuracy and is suitable for large-scale popularization and application. The application value is high.

The invention discloses a deflocculating agent for concrete washed sand and a preparation method of the deflocculating agent. The deflocculating agent is prepared from 0.5 to 1 part of air entraining agent, 0.1 to 0.2 part of sodium lauryl sulfoacetate, 15 to 30 parts of sodium pyrosulfite, 20 to 32 parts of sodium thiosulfate, 0.5 to 1 part of triethanolamine, 35 to 49 parts of diquat, 2 to 5 parts of maltodextrin, 0.4 to 1 part of cellulose and 0.5 to 1 part of glyceryl monostearate. The anti-flocculating agent provided by the invention can play a role in suspension stabilization, prevents undesirable phenomena of system instability and fluidity reduction caused by particle aggregation, can effectively solve the undesirable problems of high concrete viscosity, insufficient slump retaining performance, easy segregation and bleeding and the like caused by a flocculating agent, effectively reduces the concrete viscosity, and improves the concrete quality. And the construction performance and the quality of hardened concrete are ensured.

The invention belongs to the technical field of maltose, and particularly relates to a preparation method and application of maltose syrup. The preparation method of the malt syrup comprises the following steps: S1, adding water into corn starch to obtain a mixture, and extruding to obtain a substance I; s2, adding water into the substance I to regulate the mass fraction of the substance I to be 25-35% and the pH value to be 5.5-6.5, adding high-temperature-resistant alpha-amylase and anhydrous calcium chloride, liquefying at 90-100 DEG C for 20-30 minutes, cooling to 65-75 DEG C, adding medium-temperature alpha-amylase, and continuing liquefying for 15-20 minutes to obtain a substance II; s3, feeding the substance II into a saccharifying tank, adjusting the pH value to 5.0-5.5 and the temperature to 50-60 DEG C, adding modified beta-amylase, isoamylase and sodium thiosulfate, saccharifying for 3-6 hours, heating to 55-65 DEG C, adding pullulanase, and saccharifying for 5-10 hours to obtain a substance III; and S4, carrying out enzyme deactivation treatment on the substance III, carrying out secondary filtration and decoloration, carrying out ion exchange, collecting an ion exchange liquid, and carrying out vacuum concentration. The preparation method of the malt syrup is simple to operate, and the prepared malt syrup is high in maltose content and good in stability.

The invention relates to the technical field of water-soluble fertilizer production, in particular to a slow-release polyglutamic acid water-soluble fertilizer and a preparation method thereof. The slow-release type polyglutamic acid water-soluble fertilizer is prepared from the following raw materials in parts by mass: 2 to 10 parts of polyglutamic acid master batch, 18 to 28 parts of nitrogen fertilizer, 12 to 22 parts of phosphorus fertilizer, 15 to 20 parts of potassium fertilizer, 4 to 16 parts of medium trace elements, 9 to 15 parts of polyglutamic acid fermentation liquor and 35 to 60 parts of slow-release coating agent, the slow-release coating agent comprises the following raw materials in parts by mass: 6-13 parts of lecithin, 2-4 parts of sodium thiosulfate, 8-18 parts of vegetable oil and 19-40 parts of a zinc oxide-loaded cellulose / chitosan-based composite material; according to the slow-release type polyglutamic acid water-soluble fertilizer and the preparation method thereof, the polyglutamic acid water-soluble fertilizer is subjected to coating treatment, so that nutrients in the fertilizer can be slowly and continuously released, the effective supply time of the nutrients is prolonged, and the utilization rate of the fertilizer is increased.

The present invention discloses a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water and a method for using the same, and belongs to the technical field of treatment agents for circulating cooling water. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water comprises a first treatment agent and a second treatment agent, wherein the first treatment agent comprises the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a first precipitant, sodium sulfide; the second treatment agent comprises the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a second precipitant. The present invention can form an anti-microbial corrosion layer on the surface of a carbon steel pipeline, isolate the direct contact between the carbon steel pipeline and the circulating cooling water, protect the carbon steel pipeline, and inhibit the corrosion of the carbon steel pipeline by microorganisms in the circulating cooling water for a long time.

The invention relates to the technical field of papermaking, in particular to food waterproof and oilproof paper and a preparation method thereof.The food waterproof and oilproof paper is composed of base paper and a coating layer covering the surface of the base paper; the base paper is prepared from the following raw materials: sisal fibers, polylactic acid fibers, water glass, nano silicon dioxide, starch and polyacrylamide; preparing a coating layer: coating the surface of base paper with the coating liquid, and then drying and calendering to obtain the coating layer; the coating liquid is prepared from the following raw materials: modified fucoidin, poly (butylene succinate), modified nano cellulose, sorbitol, polysilicate aluminum sulfate, polyvinyl alcohol, sodium thiosulfate and water. Through matching and combination of the raw materials, the food waterproof and oil-proof paper has certain antibacterial property and strength while improving waterproof and oil-proof properties, and the food fresh-keeping effect is improved.

Provided herein are pharmaceutically acceptable sodium thiosulfate and pharmaceutical compositions thereof. Also provided herein are methods for determining the total non-purgeable organic carbon in a sodium thiosulfate-containing sample. Further provided herein are methods for producing pharmaceutically acceptable sodium thiosulfate. Still further provided herein are methods of treatment comprising the administration of pharmaceutically acceptable sodium thiosulfate.

This invention provides a PAM staining method that enables staining suitable for magnified observation of various samples using a range of microscopes, from optical microscopes to electron microscopes. [Solution] A PAM staining method comprising the steps of: silvering a biological sample; coloring the biological sample; and fixing the color of the biological sample, wherein the biological sample is a biologically derived sample that has been oxidized; the silvering step involves immersing the biological sample in a methenamine silver aqueous solution at room temperature, raising the methenamine silver aqueous solution from room temperature to 62°C or higher and 68°C or lower, and carrying out the silvering reaction for 30 to 40 minutes from the start of the reaction at room temperature; the coloring step involves immersing the silvered biological sample in a 0.2% gold chloride aqueous solution at room temperature for 8 to 12 hours; and the fixing step involves immersing the sample in a hard film fixing solution containing 11% to 13% sodium thiosulfate and aluminum potassium sulfate dodecahydrate for 3 minutes or more at room temperature.

The invention provides a wet desulphurization oxidation air adjusting system and method with dual-mode verification feedback. A slurry storage tank is connected with a reactor through a sampling unit; the liquid storage bottle is filled with an iodine standard solution and a sodium thiosulfate standard solution, and is connected to the reactor through a hose and a precise injection pump; an oxidation-reduction electrode is inserted into the reactor; and the upper computer measures the oxidation-reduction potential of the solution in the reactor through the oxidation-reduction electrode so as to judge the titration end point and the consumption of the consumed titration standard solution, and inverts the concentration of sulfite ions in the desulfurization slurry. The upper computer is also connected with a dissolved oxygen analyzer to detect the concentration of dissolved oxygen in the slurry in the slurry storage tank; and mutual verification with the concentration of sulfite ions is carried out to realize dual-mode feedback regulation and control of the oxidation system. According to the invention, the complex nonlinear relationship and time dependence of each measurement parameter can be effectively captured, the accuracy of continuous and automatic measurement of sulfite ions in the desulfurization slurry is realized, and the precision is ensured.

The invention relates to the technical field of lithium ion battery negative electrode materials, and discloses a method for preparing a lithium ion battery negative electrode material based on a biomass material, and the method comprises the following steps: 1, pretreating the biomass material, including cleaning and drying to remove impurities and moisture; step 2, carrying out enzyme catalytic degradation on the pretreated biomass material by utilizing cellulase to generate a porous structure material with a high specific surface area; and step 3, carrying out nitrogen-sulfur double-doping reaction in the degraded biomass material, which comprises taking urea and sodium thiosulfate as doping sources, and carrying out reaction under the condition of 40-60 DEG C through nitration enzyme catalysis. Through an enzyme catalytic degradation process, the specific surface area of the biomass material is effectively increased, a porous structure is generated, and the improvement provides more lithium ion intercalation / deintercalation active sites, so that the initial capacity and the overall electrochemical performance of the negative electrode material are remarkably improved.

The invention relates to a water treatment agent for advanced treatment of thallium-containing wastewater in nonferrous metallurgy. The water treatment agent is prepared by fully mixing and uniformly stirring the following raw materials in parts by weight: 50-80 parts of a sodium diethyldithiocarbamate aqueous solution with the mass concentration of 5%-15%, 10-40 parts of sulfide or polysulfide and 10-40 parts of sodium thiosulfate. The water treatment agent provided by the invention can realize efficient removal of heavy metal ions, does not need a subsequent treatment process, not only simplifies the treatment process, but also reduces the treatment cost.

The invention discloses a thermal cracking carbon black iodine absorption value test detection method, and relates to the technical field of material detection. The method comprises the following steps: drying thermal cracking carbon black at 125 DEG C for 1 hour to remove water, weighing 0.5 g of a sample, stirring and adsorbing with 0.04730 mol / L iodine solution at the rotating speed of 10-30 r / min for 10-30 minutes, carrying out centrifugal separation at the rotating speed of 3000-5000 r / min, ensuring that no residual carbon black exists in supernate through light transmittance detection, titrating with 0.03940 mol / L sodium thiosulfate solution, and calculating an iodine absorption value by combining a blank test. The innovation point is an exclusive drying process, dynamic adsorption-centrifugation synergy and a quantitative quality control system. The method has the beneficial effects that the detection period is shortened to be within 1 hour, the measurement error is reduced to + / -1.5%, the problems of insufficient adsorption separation and the like of a conventional method are solved, and the method is suitable for carbon black quality control in the fields of waste tire recovery and the like.

The invention discloses a preparation method of tiamulin and tiamulin fumarate based on Bunte salt, which comprises the following steps: mixing the Bunte salt and pleuromutilin p-toluenesulfonate, reacting at 45-65 DEG C for 3-5 hours to synthesize tiamulin, preparing the Bunte salt through a reaction formula 1, and preparing the pleuromutilin p-toluenesulfonate through a reaction formula 2, the molar ratio of the 2-diethylaminoethanol to the sodium thiosulfate to the chlorination reagent in the reaction formula 1 is 1: (1-1.3): (1-1.5), and the molar ratio of the pleuromutilin to the paratoluensulfonyl chloride to the pyridine in the reaction formula 2 is 1: (1-1.2): (1-1.2); the prepared tiamulin and fumaric acid are used as raw materials for a salt forming reaction, the reaction temperature ranges from 55 DEG C to 65 DEG C, the reaction time ranges from 40 min to 80 min, and after the reaction is finished, the tiamulin fumarate is prepared through cooling, crystallization, centrifugation and drying; the tiamulin fumarate disclosed by the invention is high in content, low in total amount of impurities, few in variety and stable in quality under high-temperature and high-humidity conditions, and the preparation method is simple and easy to operate and good in product quality.

The invention discloses an underwater non-dispersible early strength grouting material and a preparation method thereof, and relates to the technical field of building materials, the underwater non-dispersible early strength grouting material comprises ordinary Portland cement, silica fume, quartz sand, underwater non-dispersible reinforcing powder, polyvinyl alcohol coated sodium thiosulfate and a polycarboxylic acid water reducer; the underwater non-dispersible reinforced powder is a mixture of polyoxyethylene, an acrylamide-acrylic acid-acrylamide propyl trimethyl ammonium chloride copolymer and methyl cellulose. The method disclosed by the invention is simple to operate, the prepared grouting material is good in stability, has good dispersion resistance and self-leveling property in water, and can keep stable in an underwater environment and effectively fill gaps, the hydration process of the grouting material is promoted through combined addition of polyvinyl alcohol coated sodium thiosulfate and underwater non-dispersible reinforced powder, and the grouting effect is improved. The early strength of the grouting material is improved.

The invention discloses a method for measuring the content of ferric ions in an iron-chromium flow battery electrolyte, which comprises the following steps: before the content of the ferric ions is measured, pretreating the electrolyte to be measured to remove the influence of Cr ions and other impurity ions in the electrolyte on an experimental result, and then titrating with a sodium thiosulfate standard solution; the method has the advantages that the method is suitable for directly measuring the content of the ferric ions under the coexistence condition of a large amount of ferrous ions, the problems that in the prior art, when a large amount of ferrous ions and a trace amount of ferric ions coexist, the error is large, and the accuracy is low are solved, and a technical guarantee is provided for capacity recovery and efficiency improvement of the electrolyte of the flow battery.

The invention discloses a waste alkali liquor resource utilization device for catalytic thermal cracking of residual oil and coal-to-olefins, comprising a waste alkali liquor deoiling section, an oxidation section, an organic matter removal section, a causticizing section, an evaporation and concentration section, a miscellaneous salt removal section, a sodium thiosulfate recovery section and a liquid caustic soda modulation recovery section, wherein the waste alkali liquor of a DCC device and an MTO device is subjected to oil-water separation in the waste alkali liquor deoiling section, the contained sodium sulfide is converted into sodium thiosulfate in the oxidation section, the organic matter is removed by adsorption of activated carbon in the organic matter removal section, the contained sodium carbonate is converted into calcium carbonate and sodium hydroxide by adding quicklime in the causticizing section, the water and residual sodium sulfide, sodium carbonate, sodium chloride and sodium sulfate are further removed in the evaporation and concentration section and the miscellaneous salt removal section, the sodium thiosulfate is separated in the sodium thiosulfate recovery section and the liquid caustic soda modulation recovery section, and the concentration of sodium hydroxide is adjusted. The invention realizes the efficient and low-cost resource utilization of mixed salts in the waste alkali liquor.