322 results about "Sulphate salt" patented technology

The present application belongs to the technical field of solid waste resource utilization, and relates to a kind of microbial mineralization solid waste based three-level interpenetrating heat storage body and its preparation method.The heat storage body includes microporous silica skeleton, and the solid waste activation component loaded in its interior;The solid waste activation component includes three-level functional material and red mud matrix;With the total mass of solid waste activation component being 100%, red mud matrix accounts for 30%-50%, and three-level functional material accounts for 50%-70%;With the total mass of three-level functional material being 100%, three-level functional material includes: 50%-60% titanium dioxide quantum dots, 20%-30% gallium oxide exciton, 10%-20% activated phosphogypsum sulfate powder;Three-level functional material forms three-level interpenetrating network structure in microporous silica skeleton.In the prior art, there is a problem in the solid waste treatment method that cannot realize the application of solid waste reenergy storage field through quantum dot and exciton coupling mechanism in solid waste.

The application discloses a biological electrochemical auxiliary sulfur conversion promoting sulfur-based denitrification and sulfate emission reduction method and belongs to the field of water treatment. ‑ Nitrogen-containing wastewater enters an elemental sulfur denitrification system, and NO3 0 is reduced to N2 by sulfur autotrophic denitrifying bacteria, and elemental sulfur (S 2‑ ) is converted into SO4 2‑ . Effluent enters a cathode chamber of an electrochemical auxiliary sulfate reduction system, and hydrogen autotrophic sulfate reducing bacteria utilize cathode hydrogen production to reduce SO4 ‑ to HS 2‑ , and meanwhile, alkalinity produced by cathode hydrogen production neutralizes acidity produced in the denitrification process in the elemental sulfur denitrification system. ‑ HS 2‑ / supernatant is returned to the elemental sulfur denitrification system to react with S 0 to generate polysulfide (S n 2‑ ), S n 2‑ , which is used as an efficient electron donor to participate in denitrification, thereby significantly improving denitrification efficiency. The application does not need to add an organic carbon source, sludge production is small, high-concentration nitrogen-containing wastewater is efficiently treated, and the content of sulfate in effluent is simultaneously reduced, thereby realizing sulfur resource recycling, and the application is an economic and environment-friendly autotrophic denitrification method.

The application provides a modified fluorogypsum-based steel structure fireproof coating and a preparation method thereof, and comprises the following steps: 1) mixing and treating carbide slag and fluorogypsum raw materials to obtain a first intermediate; 2) microwave heating treatment of the first intermediate, wherein the microwave heating treatment process comprises primary heating treatment and secondary heating treatment, and a second intermediate is obtained; 3) secondary mixing treatment of the second intermediate and an excitation agent to obtain modified fluorogypsum; wherein the microwave power of the microwave heating treatment is 300W-500W, and the microwave frequency is 2450MHz-2500MHz; the excitation agent comprises at least two of a sulfate, a silicate and a water-soluble aluminum salt. The method eliminates fluorine ions and acidic impurities in fluorogypsum waste residues which are harmful to the human body and the environment, excites the hydration activity of the fluorine ions and the acidic impurities, improves the high-temperature resistance of the fluorine ions and the acidic impurities, and further makes the fluorine ions and the acidic impurities meet the performance requirements of the modified fluorogypsum-based steel structure fireproof coating, and increases the fluorogypsum waste residue consumption path.

This invention relates to the field of aqueous metal battery technology, specifically to an aqueous tin metal battery electrolyte containing metal sulfate additives, its preparation method, and its application. The electrolyte is based on an alkaline electrolyte (such as KOH) and soluble tin salts (such as SnSO4, SnCl2), with added metal sulfates such as Li2SO4, ZnSO4, K2SO4, MnSO4, or Na2SO4 as additives at a concentration of 0.01 mol / L to 0.5 mol / L. The metal cations preferentially adsorb onto the surface of the metal anode to form an electrostatic shielding layer, regulating metal ion deposition behavior, inhibiting the formation of "dead tin," and significantly improving the battery's cycle stability and coulombic efficiency.

The application discloses a nickel-plated steel strip lead processing method and belongs to the technical field of metal material surface treatment. The method aims to solve the problems of poor plating layer adhesion, large internal stress and easy peeling of the existing nickel-plated steel strip lead. The process steps include: S1, steel strip oil removal treatment; S2, composite activation treatment: the oil-removed steel strip is immersed in a composite activation solution containing sodium citrate to remove the surface oxide layer and form an active adsorption film; S3, nickel plating: the activated steel strip is immersed in a sulfate plating solution containing saccharin and 1,4-butynediol as composite additives for electroplating to form a low-stress and high-density nickel plating layer; S4, post-treatment: cleaning and drying; S5, slitting and packaging. The application cooperates sodium citrate activation with a plating solution system containing stress relieving agents, significantly improves the adhesion between the substrate and the plating layer, reduces the internal stress of the plating layer, and the obtained product has no peeling and falling of the plating layer after repeated bending, low porosity and excellent comprehensive performance, and is particularly suitable for the manufacturing of high-performance electronic component leads.

The application discloses an electrode material based on MOF@COF / BC and application thereof in wastewater treatment and belongs to the technical field of wastewater treatment. The electrode material is prepared by the following method: NH2-MIL101(Fe), melamine and phthalocyanine molybdenum are dissolved in dimethyl sulfoxide, reaction is carried out at 160-200 DEG C for 10-14 h, the precipitate is collected after reaction, and washing, drying are carried out to prepare NH2-MIL101(Fe)@Mel-MoPc; the biochar and NH2-MIL101(Fe)@Mel-MoPc are mixed in deionized water, ultrasonic treatment is carried out for 8-12 min, stirring is carried out for 10-14 h, then the precipitate is collected by centrifugation, and washing, drying are carried out to prepare the electrode material. The application develops and designs a novel electrode material, which is used for electrocatalytic activation of peroxymonosulfate to degrade OFX wastewater, and the degradation efficiency of the OFX wastewater is greatly improved.

The application discloses a quaternary solid waste-based soil stabilizer (GSCP) for a base layer, which is composed of slag (GGBFS), steel slag (SSA), calcium carbide slag (CS) and phosphogypsum (PG) and has a weight ratio of GGBFS:SSA:CS:PG=56:24:12:8. The stabilizer forms C-S-H colloid and ettringite (AFt) through alkaline activation and sulfate activation, does not need to add cement or chemical activator, is used for stabilizing silty clay and steel slag mixed soil, and significantly improves the unconfined compressive strength, splitting tensile strength, water stability and freeze-thaw resistance. Compared with a traditional cement-based stabilizer, the application reduces carbon emission by 82% and cost by 31.25%, provides a low-carbon and economical solution for road engineering, and is suitable for the base layer and the subbase layer of a secondary road or above.

The application discloses a gold leaching method for pyrite-containing gold ore, and comprises the following steps: after the pyrite-containing gold ore is finely ground, water is added to obtain a slurry; a gold leaching reagent solution is added into the slurry to obtain a mixed leaching solution; the pH value of the mixed leaching solution is adjusted to alkaline, and leaching treatment is performed; and after filtration, a gold-containing leaching solution is obtained; the gold leaching reagent solution comprises polyphosphate, copper salt and thiosulfate; in the gold leaching reagent, polyphosphate is added; under alkaline conditions, polyphosphate ions can be selectively adsorbed or complexed on the surface active sites of pyrite to form a physical or chemical masking layer, thereby effectively blocking the direct contact of pyrite with dissolved oxygen and thiosulfate in the solution, inhibiting the catalytic decomposition of pyrite, significantly reducing the invalid consumption of thiosulfate, stabilizing the pH value and potential of the leaching system, and guaranteeing the efficient leaching of gold.

The present application belongs to the technical field of concrete, and discloses a method for evaluating the degradation grade of concrete aggregate caused by sulphate attack. The method comprises the following steps: first, preparing fine aggregate samples from the sulphur-containing aggregate to be evaluated; then, mixing the samples with cement and water to prepare mortar expansion rate test pieces and mortar flexural strength test pieces; next, testing the 84d expansion rate of the mortar expansion rate test pieces and the 84d flexural strength retention rate of the mortar flexural strength test pieces; finally, evaluating the grade according to the test results: if the 84d expansion rate is greater than 0.2%, the sulphate attack is determined to be strong; if the 84d expansion rate is less than or equal to 0.2% and the flexural strength retention rate is less than 80%, the sulphate attack is determined to be moderate; if the 84d expansion rate is less than or equal to 0.2% and the flexural strength retention rate is greater than or equal to 80%, the sulphate attack is determined to be weak. The present application solves the problem of the lack of a unified test method standard for sulphate attack on concrete aggregate, provides a complete test method, establishes an evaluation system for the damage grade of sulphate attack, and promotes the use of aggregate with excessive sulphur content.

The present invention relates to a process for separating lithium ions and sodium ions from a sulfate-containing solution, and to an apparatus for carrying out the process.

This invention discloses a treatment process for high-concentration sulfate wastewater, belonging to the field of wastewater purification technology. The invention first provides a multifunctional composite ion sieve, the raw materials of which include magnetic core microspheres, calcium aluminate precursor components, heavy metal chelating agents, scale inhibitors, antioxidants, antibacterial agents, host-guest recognition agents, polysaccharide compounds, polyacrylic acid compounds, crosslinking agents, and initiators. The ion sieve is prepared through steps including magnetic core preparation, calcium aluminate precursor functional layer deposition, small molecule modification layer loading, and pH-responsive outer shell coating. In use, the ion sieve is added to wastewater and stirred for adsorption. After adsorption saturation, solid-liquid separation is achieved through magnetic separation, and the material is regenerated and recycled sequentially using desorption and reconstruction solutions.

This disclosure relates to a desulfurization method for sulfur-containing wastewater, comprising the following steps: the sulfur-containing wastewater is introduced into an anaerobic biological unit for sulfate reduction treatment to obtain reduced wastewater; the reduced wastewater and oxygen-containing gas are introduced into a hydrogen sulfide stripping unit for stripping treatment to obtain hydrogen sulfide gas products and stripped water; the stripped water is introduced into a water quality stabilization unit for activated carbon adsorption treatment to obtain purified water; the hydrogen sulfide gas products and air are introduced into a biological oxidation unit for hydrogen sulfide oxidation treatment to obtain elemental sulfur and tail gas; the tail gas obtained from the biological oxidation unit is introduced into a tail gas treatment unit, where it undergoes sequential water vapor removal treatment, activated carbon adsorption treatment, and photocatalytic oxidation treatment to obtain purified tail gas. This disclosure enables efficient treatment of high-concentration sulfate wastewater and the recovery of elemental sulfur.

This invention discloses a method for preparing and applying a class of highly efficient catalytic materials for activating persulfate. The preparation method includes: dispersing g-C3N4 in nitric acid at room temperature, stirring, washing, and drying to obtain g-C3N4-H; placing it in an inert atmosphere and treating it at high temperature to obtain a g-C3N4 substrate; mixing it with iron salt, cobalt salt, water, and 1,10-phenanthroline to obtain a suspension; evaporating to dryness, grinding, drying, treating at high temperature, dispersing in nitric acid, washing, drying again, treating at high temperature in an inert atmosphere, and naturally cooling to obtain FeCo-g-C3N4 catalytic material. The method of this invention constructs structurally stable and highly dispersed FeCo bimetallic-nitrogen-carbon active centers on the g-C3N4 substrate; it can achieve efficient degradation of pollutants with low dosage, while the metal leaching rate is extremely low, avoiding secondary pollution; this catalytic material combines high activity, high stability, environmental friendliness, and operational economy, showing outstanding application potential in the field of advanced oxidation water treatment.

The application discloses a preparation method of a high-selectivity hydrogen peroxide production catalytic electrode, and the method comprises the following steps: (1) dissolving a soluble copper salt and a soluble zinc salt in water to prepare a mixed precursor solution containing Cu2+ and Zn2+ with different proportions; (2) adding a precipitant solution to the mixed precursor solution obtained in the step (1) under stirring, controlling the pH range of the reaction system, regulating the local coordination environment, the local electronic structure, especially the microenvironment of the lattice hydroxyl of the basic copper carbonate, and making the system generate a zinc-modified basic copper carbonate precipitate through aging crystallization, and then performing solid-liquid separation, washing and drying treatment to obtain a zinc-modified basic copper carbonate material; and (3) dispersing the zinc-modified basic copper carbonate material obtained in the step (2) into a solvent to form a catalyst slurry, and loading the catalyst slurry on the surface of a conductive substrate, and then performing drying to obtain a supported zinc-modified basic copper carbonate catalytic electrode. The reasonable lattice hydroxyl structure of the obtained material can be used for electrochemical oxidation of water to prepare hydrogen peroxide in a sulfate electrolyte system, and the material has good hydrogen peroxide production capacity and faradic efficiency.

The application discloses an acidification soil heavy metal passivation and acidification treatment integrated method, and aims to solve the pollution problem of karst pyrite mine area soil. The method comprises the following steps: S1, preparing an improving agent: S11, taking modified dolomite powder, modified rectorite, sulfonated asphalt powder-pullulan composite microspheres, modified chitosan quaternary ammonium salt, modified fly ash based pectin carrier and modified rice husk ash, and uniformly mixing the same to obtain a mixture; S12, adding hydroxyapatite-zeolite composite filler into the mixture, then adding water to adjust the water content of the system to 25%-40%, inoculating a jelly-like bacillus-paenibacillus complex inoculant, fully stirring and mixing, and preparing the improving agent. The method can effectively optimize soil structure, stabilize lead, zinc, cadmium, arsenic and other heavy metals, degrade sulfates, improve soil fertility and microbial activity, and is suitable for the environmental characteristics of karst area rainfall leaching, and can meet the treatment and application requirements of the compound contaminated soil.

The application belongs to the technical field of cleaning agents, and particularly relates to an oil layer cleaning agent and a preparation method thereof. The oil layer cleaning agent is composed of the following raw materials in percentage by weight: polyammonia ether sulfate 0.3-0.5%, sodium dodecyl benzene sulfonate 0.1-0.3%, tripropylene glycol 6-10%, and the rest is water. The structural formula of the polyammonia ether sulfate is as follows: wherein m=5-20, and n=5-50. The oil layer cleaning agent has the advantages of good crude oil cleaning effect, the highest oil washing rate of 98.8%, simple preparation, and no by-products.

Disclosed in the present application are a quaternary sulfate molten salt heat storage material, a composite heat storage material, and a preparation method therefor and the use thereof. The preparation method for the quaternary sulfate molten salt heat storage material comprises: subjecting first sulfate-type salt lake raw brine to freezing and recrystallization treatments to obtain sodium sulfate decahydrate; subjecting second sulfate-type salt lake raw brine to evaporative crystallization and recrystallization treatments to obtain magnesium sulfate heptahydrate; and mixing the sodium sulfate decahydrate, the magnesium sulfate heptahydrate, potassium sulfate, and calcium sulfate, heating the mixture at a first heating rate to a first dehydration temperature for a first heat treatment, then heating at a second heating rate to a second dehydration temperature for a second heat treatment, and then heating at a third heating rate to a molten blending temperature for a third heat treatment, and thereby obtaining the quaternary sulfate molten salt heat storage material. In the present application, a quaternary sulfate molten salt heat storage material is prepared by a one-step method using dehydration and coupling technology. Moreover, the specific heat of the composite heat storage material is improved by adding nanoparticles to the quaternary sulfate molten salt heat storage material.

The present invention relates to a composition comprising at least one amine selected from the group consisting of N,N,N',N'-tetramethylethylenediamine, N,N,N',N'- tetramethylpropylenediamine, 1,8-diazabicyclo[5.4.0]undec-7-ene, N,N- dimethylethylenediamine, 4-methylmorpholine, dimethyl-(2-azidoethyl)amine and mixtures thereof; at least one organic solvent selected from the group consisting of acetonitrile, dimethyl isosorbide, acetone, dimethylsulfoxide, and mixtures thereof; and at least one carboxylic, nitrate, or sulfate salt of a transition metal; wherein the transition metal is completely dissolved in the composition. The invention also relates to hypergolic compositions and uses thereof.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for treating organic phosphonic acid wastewater by using a supported copper monatomic catalyst, wherein persulfate and the supported copper monatomic catalyst are added into the organic phosphonic acid wastewater to degrade the organic phosphonic acid; the supported copper monatomic catalyst is a metal oxide loaded with copper monatomic atoms, wherein the loading amount of the copper monatomic atoms is 1-10 wt% of the total weight of the catalyst. Compared with the prior art, the present application solves the problem that metal ions cannot be recovered in the advanced oxidation process of the prior art in the treatment of organic phosphonic acid wastewater. The present application provides an advanced oxidation technology for organic phosphonic acid wastewater, realizes efficient and deep degradation of the organic phosphonic acid in the wastewater, can adapt to wastewater in a wide pH range, and has strong anti-interference and high selectivity after multiple degradation, with a very low metal leaching content (0.0015 mg / L).

The invention relates to the technical field of oilfield development, and discloses a composition with an oil displacement function, application of the composition and a thickened oil recovery method. The composition comprises a nano material, a surfactant and a polymer, wherein the surfactant is selected from at least one of fatty alcohol polyether sulfonate, fatty alcohol polyether sulfate, a gemini surfactant containing a sulfonic acid group, a glycoside compound, an alcohol amine compound and an amide compound containing a hydroxyl group; wherein the mass ratio of the nano material to the surfactant is (0.1-2): 1. The aqueous solution of the composition has the characteristics of high viscosity and low interfacial tension in indoor experiments and field application, and can reduce the average water content of high-calcium-magnesium oil reservoirs and improve the crude oil recovery rate, thereby greatly improving the oil quantity and benefits of low-yield and low-efficiency wells.

This utility model discloses a comprehensive treatment system for zinc-containing waste generated in viscose fiber production, belonging to the field of waste treatment in viscose fiber production. The system includes a reaction tank, filter press, pretreatment device, filter, ion exchange resin column, and acid bath preparation tank, ensuring a comprehensive treatment pathway for zinc-containing waste. This facilitates the mixing of highly acidic, high-salt zinc-containing wastewater with zinc-containing sludge. The strong acidity of the wastewater allows for the acid leaching of zinc sulfide and zinc hydroxide in the sludge, simultaneously obtaining a zinc sulfate solution and recovering sulfate to prepare sodium sulfate and sulfuric acid. This reduces the salinity of the wastewater, thereby decreasing the amount of reagents used in treating zinc-containing wastewater, mitigating scaling risks, and reducing the load on subsequent biochemical systems.

This application discloses a method for preparing sulfur-modified flash graphene, belonging to the field of graphene production technology. The method involves first mixing sulfate with biomass and drying it, followed by pyrolysis and carbonization to obtain sulfur-modified carbon; then subjecting the sulfur-modified carbon to Joule flash evaporation to obtain flash graphene; the mass ratio of sulfate to biomass is 1–6:10; during the Joule flash evaporation process, the voltage is 100–250V, and the flash evaporation time is 8–12s. This application achieves in-situ sulfur doping in the carbon framework through impregnation pyrolysis to form sulfur-modified carbon. The sulfur-modified carbon is then subjected to Joule flash evaporation, where instantaneous ultra-high temperature achieves carbon atom rearrangement, generating a graphene structure. A sulfur-doped precursor is constructed using "sulfate impregnation of biomass," and the "instantaneous ultra-high temperature characteristics of Joule flash evaporation" achieve highly graphitized and porous carbon structures while retaining a high sulfur doping content, thus obtaining sulfur-modified flash graphene for high-performance adsorption applications.

The application discloses a low-recess silicon through-hole copper film chemical mechanical polishing liquid and application thereof. The low-recess silicon through-hole copper film chemical mechanical polishing liquid comprises abrasive particles, an oxidizing agent, a chelating agent, a corrosion inhibitor, a butterfly-shaped recess inhibitor and water; the butterfly-shaped recess inhibitor is selected from structural compounds of formula 1 and / or formula 2, two C6-C12 hydrophobic alkyl chains of the structural compounds isolate the attack of chemical substances on the copper film layer, have more excellent steric hindrance than linear alkyl sulfate with the same number of carbon atoms, can synergistically act with the corrosion inhibitor to further reduce the copper corrosion rate, and thus improve product yield. Meanwhile, the butterfly-shaped recess inhibitor is adsorbed on the surface of the copper film layer in the groove, protects the copper film layer from being excessively removed in the over-polishing time, and thus significantly improves the butterfly-shaped recess after polishing. Although the overall removal rate of the copper film slightly decreases, high and adjustable copper removal rates can be achieved under lower down pressure, and production efficiency is ensured.

A cosmetic composition for cleansing and conditioning keratin fibers, in particular human hair, comprises a surfactant system consisting of at least one sulfate-free anionic surfactant and at least one cationic surfactant, and is used for improving the wash fastness of dyed hair.

This invention relates to the field of oil well cementing technology, and discloses a slow-release nano-early strength agent, its preparation method, and cement slurry. The slow-release nano-early strength agent includes a carrier and an early strength agent loaded on the carrier. The carrier comprises halloysite nanotubes, and the early strength agent comprises one or more of chloride, sulfate, nitrate, and organic compounds. The weight ratio of the early strength agent to the carrier is (5-30):100. This invention utilizes the unique cavity structure of halloysite nanotubes and the strong interfacial interaction with cement to synthesize a slow-release nano-early strength agent, thereby improving the early strength of cement and extending the cement thickening time.