636 results about "Sodium silicate" patented technology

The invention relates to the technical field of ceramic materials, in particular to a preparation method of a diatomite-based porous ceramic material and application of the diatomite-based porous ceramic material in wastewater pollutant treatment. The preparation method of the diatomite-based porous ceramic material comprises the following steps: mixing a basic raw material, a sintering aid, a pore forming agent and a binder, performing compression molding to obtain a green body, and sintering the green body, the basic raw materials comprise 80-85% of diatomite, 5-10% of kaolin, 0-5% of feldspar and 5-10% of sodium silicate; the mass of the sintering aid is 5% higher than that of the basic raw material; the mass of the pore-forming agent is 25-45% of that of the basic raw material, and the pore-forming agent is selected from one or more than two of crystalline flake graphite, polymethyl methacrylate and spherical graphite. By controlling the composition and dosage of the basic raw materials, the sintering aid and the pore-forming agent, a micro-nano hierarchical pore structure is formed, mechanical properties and permeability are improved at the same time, and good filtration and interception performance on pollutants in wastewater is achieved.

The present application relates to pulping technology field, the present application provides a kind of high-strength high-cleanliness chemical pulp's pulping process, with bamboo willow edge scrap as fiber raw material, after 1 stage pre-steaming, chip washing, dehydration, 2 stage pre-steaming;The wood chip material after 2 stage pre-steaming is 1 stage extrusion and is dissolved, 1 stage chemical liquid pre-impregnation, 2 stage extrusion and is dissolved, 2 stage chemical liquid pre-impregnation;1 stage chemical liquid pre-impregnation uses sodium hydroxide solution and does not use hydrogen peroxide, the chemical reagent of 2 stage chemical liquid pre-impregnation process is sodium hydroxide, hydrogen peroxide and sodium silicate;Material after 2 stage chemical liquid pre-impregnation is 1 stage refining, separation, cooling, 1 stage high-concentration bleaching, 1 stage dehydration, 2 stage high-concentration bleaching, 2 stage dehydration;Pulp after 2 stage dehydration is latent, refining etc., and the finished product is prepared.This application process can produce high-strength, high-cleanliness chemical pulp, and the pulp cost is lower, and the pulp quality is better, and it is beneficial to high-end cultural paper etc. application.

The application relates to the technical field of building materials, and discloses a permeable crystalline self-healing waterproof material for concrete self-waterproofing, which is prepared from the following raw materials in parts by weight: 20-30 parts of sodium-based bentonite, 20-50 parts of sodium methyl silicate, 4-6 parts of a penetrating agent, 8-12 parts of a sulphoaluminate cement, 15-18 parts of a silicone zirconium, and 2-5 parts of a complexing agent; the complexing agent is composed of 2-[3-(4-pentylphenyl)prop-2-enylamino]benzoic acid and sodium ethylenediaminetetraacetate. The above technical scheme solves the problem of low mechanical performance and waterproofness of concrete in the prior art.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

The invention belongs to the technical field of building material and solid waste resource utilization, and relates to a high-durability and high-toughness slag powder-steel slag powder quaternary synergistic excitation-reinforcing agent and a preparation method of gel system mortar. The quaternary synergistic excitation-reinforcing agent comprises the following raw materials in parts by mass: 4-16 parts of sodium hydroxide, 79 parts of sodium silicate, 4-16 parts of aluminum sulfate and 60 parts of metakaolin, and the sum of the mass parts of the sodium hydroxide and the aluminum sulfate is 20. According to the quaternary synergistic excitation-reinforcing agent, sodium hydroxide and sodium silicate are used as main excitants, and aluminum sulfate serving as a function regulator and metakaolin serving as a high-activity aluminum-silicon source and a micro aggregate are introduced to serve as synergistic reinforcing components; the four components cooperate to jointly form an excitation-reinforcement composite system with high durability and high toughness; the sulfate erosion resistance, the chloride ion penetration resistance, the carbonization resistance, the toughness and the impact resistance of the slag powder-steel slag powder cementing system mortar are improved.

The invention provides a method for preparing a poly-aluminum and functional silicon material by activating coal gasification slag and waste hydrochloric acid through microwave synergistic mechanical force, and belongs to the technical field of industrial solid waste recycling. The method comprises the following steps that the coal gasification slag is sequentially subjected to microwave radiation treatment and ball milling, activated slag and waste hydrochloric acid are subjected to an acid leaching reaction, and aluminum-iron-containing leachate and silicon-rich slag are obtained; extracting the aluminum-iron-containing leaching solution to obtain an iron-rich organic phase and a purified aluminum chloride solution; performing thermal polymerization reaction on the purified aluminum chloride solution to obtain polyaluminum chloride; the method comprises the following steps: carrying out alkaline leaching reaction on silicon-rich slag and waste alkali liquor, adding a structure-directing agent into a sodium silicate solution, and sequentially carrying out aging, solution pH value adjustment and crystallization precipitation to obtain mesoporous silica. According to the method, the aluminum-silicon leaching rate is remarkably increased through microwave-mechanical force synergistic activation, synergistic and efficient treatment of the three kinds of waste including the coal gasification slag, the waste hydrochloric acid and the waste alkali liquid is achieved, the technological process is closed, the product additional value is high, and the environmental and economic benefits are remarkable.

The invention discloses fiber reinforced-internal curing anti-crack concrete, which is prepared from the following components in parts by weight: 230 to 300 parts of cement, 20 to 50 parts of fly ash, 10 to 15 parts of mineral powder, 2 to 4 parts of internal curing agent, 1 to 2 parts of reinforced fiber, 700 to 800 parts of sand, 1000 to 1200 parts of stone, 150 to 170 parts of water and 2.3 to 3.3 parts of water reducing agent, the internal curing agent is obtained by taking sodium silicate, water-soluble aluminum salt, polyvinyl alcohol and amino silane as main raw materials and carrying out temperature control reaction and coupling modification. According to the invention, the internal curing agent with a core-shell porous skeleton structure is adopted, so that effective matching with the hydration rate can be promoted, and the slow-release stability can be remarkably improved; meanwhile, improvement of fiber-matrix interface bonding is facilitated, microcrack initiation is effectively delayed, expansion is inhibited, and synchronous improvement of strength and crack resistance is achieved; the preparation method is simple and convenient in process and suitable for popularization and application.

The invention relates to a scale inhibitor for an industrial circulating water system and an intelligent adding method thereof, and belongs to the technical field of industrial water treatment.The scale inhibitor is composed of a component A and a component B. The component A comprises, by mass, 5-15% of sodium molybdate, 5-15% of sodium tungstate, 15-25% of sodium polyacrylate, 5-15% of sodium borate, 15-25% of zinc sulfate, 5-10% of zinc chloride, 3-8% of sodium silicate and 2-6% of benzotriazole; the component B is prepared from the following components in percentage by mass: 15 to 25 percent of HEDP, 15 to 25 percent of PBTC, 35 to 50 percent of AA / AMPS copolymer and 15 to 25 percent of deionized water. According to the scale inhibitor for the industrial circulating water system and the intelligent adding method of the scale inhibitor, a phosphorus-free and chromium-free environment-friendly formula with sodium molybdate and sodium tungstate as cores is adopted, and phosphorus pollution and heavy metal risks are fundamentally eradicated; according to the formula, through cooperation of multiple components, a layer of compact and stable composite passivation film with self-repairing capacity can be formed on the metal surface in severe water with high chloride ions, and the corrosion inhibition rate gt of carbon steel is achieved; the copper corrosion inhibition rate is gt; and 98%.

The invention discloses high-durability quick-hardening concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials: aluminoferrite cement, vitreous calcium aluminate clinker, a coagulant nucleation agent, a nano hybrid siliceous material, a calcium-magnesium composite expanding agent, a self-healing agent, a hydration heat regulating agent, a water reducing agent, an early strength agent, a defoaming agent, a thickening agent, a retarder, an air entraining agent and aggregate. The coagulating nucleating agent is prepared from semi-hydrated gypsum, ferrous sulfate and aluminum potassium sulfate; the nano hybrid siliceous material is prepared by reacting acidic silica sol with sodium methyl silicate at 40-60 DEG C for 1-3 hours. According to the high-durability quick-hardening concrete and the preparation method thereof, the iron aluminate cement, the vitreous calcium aluminate clinker, the coagulant nucleation agent, the nano hybrid siliceous material, the calcium-magnesium composite expanding agent, the self-healing agent and the hydration heat regulating agent are utilized to form a brand-new high-durability and high-adaptability quick-hardening system. The mechanical property, the volume stability and the durability are comprehensively superior to those of the traditional quick-hardening concrete.

This invention relates to the field of concrete technology, specifically to a self-healing concrete material, its preparation method, and its application. The self-healing concrete material is a core-shell structured microcapsule, comprising a core material and a wall material. The wall material wraps around the core material. The core material comprises the following raw materials in parts by weight: 4-6 parts β-cyclodextrin, 12-18 parts sepiolite powder, 5-10 parts shellac powder, 25-35 parts sulfoaluminate cement, 10-15 parts magnesium oxide, 12-16 parts sodium silicate aqueous solution, and 14-17 parts calcium carbonate. The wall material comprises the following raw materials in parts by weight: 20-30 parts polyvinyl alcohol, 20-30 parts ethyl cellulose, 15-25 parts bentonite, and 25-35 parts corn starch. The mass ratio of the core material to the wall material is 6-7:3-4. The core material of the self-healing concrete material provided by this invention, comprising β-cyclodextrin, sepiolite powder, and shellac powder, can improve the problems of slow repair speed and poor reinforcement effect of self-healing materials.

This invention provides a micro-arc oxidation electrolyte for magnesium alloy surface treatment and a method for preparing a micro-arc oxidation film. The micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles; or, an aqueous solution containing sodium silicate, potassium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles. This invention also discloses a method for preparing a micro-arc oxidation film using the aforementioned micro-arc oxidation electrolyte for magnesium alloy surface treatment. The micro-arc oxidation electrolyte of this invention contains conductive ceramic nanoparticles—titanium boron carbon nitride conductive nanoparticles. Using these nanoparticles to perform a micro-arc oxidation reaction on the magnesium alloy surface can improve the microstructure of the micro-arc oxidation film, while simultaneously enhancing the corrosion resistance and wear resistance of the magnesium alloy after micro-arc oxidation treatment, significantly improving the surface protection capability of the magnesium alloy, and extending its service life.

The invention discloses a preparation method of a water-resistant and melting-resistant sodium silicate-based fireproof coating, and belongs to the technical field of preparation of fireproof materials and inorganic-organic hybrid coatings. The method comprises the following steps: (1) reacting isophorone diisocyanate with polypropylene glycol to prepare an isocyanate-terminated polyurethane prepolymer; (2) mixing the polyurethane prepolymer with piperazine pyrophosphate to obtain a component A; (3) mixing a sodium silicate aqueous solution with melamine to obtain a component B; and (4) mixing and curing the component A and the component B in proportion to obtain the coating. According to the invention, an isocyanate group in a polyurethane prepolymer and a sodium silicate aqueous solution are subjected to an in-situ chemical reaction, an organic hydrophobic network is constructed on the surface of an inorganic phase, and the water resistance of the coating is remarkably improved. Meanwhile, piperazine pyrophosphate and melamine form an intumescent flame-retardant system, the intumescent flame-retardant system and sodium silicate are synergistically promoted to form a compact and stable intumescent layer at high temperature, and the problems that a traditional water glass coating easily absorbs moisture and melts and flows at high temperature are effectively solved. The method is simple and controllable in process, and the prepared coating has excellent water resistance, fire resistance and heat insulation performance.

The application provides a Y molecular sieve adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: mixing a pore-expanding agent and a Y molecular sieve, and calcining to obtain the Y molecular sieve adsorbent; wherein the pore-expanding agent comprises any one or a combination of at least two of sulfuric acid, hydrochloric acid, nitric acid, acetic acid, a sodium hydroxide solution, a potassium hydroxide solution, lactic acid, ammonia water, malic acid, succinic acid, propionic acid, formic acid, sodium carbonate, amino acid, ascorbic acid or sodium silicate. The application mixes the pore-expanding agent and the Y molecular sieve, and then performs calcination, so that the pore-expanding agent is effectively eliminated, the pore of the Y molecular sieve adsorbent is improved, the Y molecular sieve adsorbent with excellent adsorption performance is prepared, and efficient adsorption of carbon dioxide is realized. The preparation process of the Y molecular sieve adsorbent is simple, the preparation process cost is low, and the Y molecular sieve adsorbent has the advantages of green environmental protection.

This invention discloses a process for preparing solid sodium silicate based on controllable particle size water quenching, belonging to the field of inorganic silicate chemical technology. The specific steps are as follows: S1: raw material melting and homogenization; S2: controllable particle size water quenching; S3: solid-liquid separation and online classification; S4: deep drying and packaging. This invention achieves innovation and simplification of the production process: through a one-step "atomization-cooling" forming method, the high-energy-consuming crushing and screening processes in traditional processes are completely eliminated, shortening the process flow and reducing equipment investment and maintenance costs; it significantly improves the overall quality of the product: directly generating solid particles with high sphericity and smooth surface, the product has good flowability, stable bulk density, high whiteness, and no tendency to agglomerate during subsequent dissolution, with a faster dissolution rate and superior application performance.

The invention discloses a small-grain Y-type molecular sieve and a preparation method thereof, the raw materials comprise sodium aluminate, sodium silicate, aluminum sulfate and small-grain seed crystal, the small-grain seed crystal is prepared from sodium silicate, sodium aluminate and a liquid alkali solution according to the substance amount ratio (silica: aluminum oxide = 15.5-16.5: 1, sodium oxide: silica = 0.75-0.79: 1, and water: silica = 13.5-13.9: 1), and the small-grain Y-type molecular sieve is obtained through induced nucleation and slow growth. And standing and storing at a constant temperature of 27-28 DEG C for 2 weeks (the seed crystal has been applied for the patent of invention, and the patent number is CN 118877905B). Then preparing the small-grain seed crystal, sodium aluminate, sodium silicate and aluminum sulfate according to the substance amount ratio (silicon dioxide: aluminum oxide = 8.3-8.4: 1, sodium oxide: silicon dioxide = 0.50-0.51: 1, and water: silicon dioxide = 23.5-24: 1) and the seed crystal proportion of 0.5%-4.0%, statically crystallizing for 40-50 hours in a normal-pressure reaction kettle at 100 + / -2 DEG C to obtain a small-grain NaY molecular sieve (phi 300nm), filtering and washing, and drying to obtain the small-grain NaY molecular sieve. The obtained small-grain Y-type molecular sieve is large in outer surface, multiple in mesopores, suitable for low-temperature (0-50 DEG C) exchange reaction, high in reaction speed, more energy-saving and environment-friendly, and has more development space in the fields of catalytic cracking, hydrogenation agents and adsorbents.

This invention discloses a method for preparing a carbon source for microbial culture medium based on enzymatic hydrolysis of bamboo powder and its application, belonging to the field of high-value utilization technology of biomass resources. Using bamboo powder as raw material, the invention involves mild alkali pretreatment to disrupt the dense structure of lignocellulose, followed by enzymatic hydrolysis using a specialized enzyme system of endoglucanase Cel7B and xylanase XynA expressed heterologously by *E. coli* in an optimized ratio. After solid-liquid separation, an enzymatic hydrolysate rich in reducing sugars is obtained. The hydrolysate is then nutritionally fortified with trace elements such as sodium thiosulfate and sodium silicate to produce a low-cost, high-efficiency liquid carbon source. This invention achieves high-value utilization of bamboo waste. The entire process is mild, environmentally friendly, and simple, easily scaled up industrially, and solves the industry bottleneck of high carbon source cost in industrial microbial culture, demonstrating good application prospects and market value.

The application relates to the technical field of sodium fluorosilicate preparation, in particular to a device for continuously producing sodium fluorosilicate, which comprises a precipitation tank, a high-position tank one, a high-position tank two, a reaction box, a dissolving tank one and a dissolving tank two, a joint is fixed to the upper end surface of the precipitation tank, the precipitation tank is communicated with the high-position tank one through a pipeline, the bottom of the high-position tank one and the high-position tank two is communicated with the reaction box through a pipeline, and the high-position tank two is communicated with the dissolving tank one and the dissolving tank two through a pipeline; a stirring mechanism is arranged in the reaction box, the stirring mechanism comprises a stirring cavity which is arranged in the reaction box, and a sealing plate is screw-connected to the front end surface of the reaction box; the application is provided with the stirring mechanism and the crushing assembly; during the mixing reaction, block materials are generated; at this moment, the rotating speed of the motor is slowed down; the stirring blades are intermittently magnetically attracted through the electromagnets; the stirring blades are slightly displaced on the surface of the rotating shaft; and the block materials between the adjacent stirring blades are extruded and crushed.

The invention discloses a P-doped Bi4Si3O12-Bi12SiO20 heterojunction photoelectric catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding Bi (NO3) 3.5 H2O into ethylene glycol, and stirring until Bi (NO3) 3.5 H2O is dissolved to obtain a solution A; adding sodium silicate nonahydrate into deionized water, and stirring until the sodium silicate nonahydrate is dissolved to obtain a solution B; dropwise adding the solution B into the solution A, uniformly stirring to obtain a mixed solution, adding sodium phosphate, and uniformly stirring to obtain a solution C; the pH value of the solution C is adjusted to 3-14, CTAB is added into the solution, the mixture is stirred to be uniform and then filled into a reaction kettle lining, the reaction kettle lining is placed in a hydrothermal drying oven to react for 6-48 h at the temperature of 100-220 DEG C, the temperature in the drying oven is reduced to the room temperature, then the reaction kettle is taken out to be cooled, centrifugation, washing and drying are carried out, powder, namely the P-doped Bi4Si3O12-Bi12SiO20 heterojunction photoelectrocatalytic material is obtained, interface charge transfer is promoted through construction of the P-doped Bi4Si3O12-Bi12SiO20 heterojunction, and the P-doped Bi4Si3O12-Bi12SiO20 heterojunction photoelectrocatalytic material is obtained. The photogenerated charge separation is improved, and the yield of long-life charges is improved, so that the charge recombination is inhibited, and the efficiency of photoelectrocatalysis water splitting is greatly improved.

The invention discloses a preparation method of a barium-based hydrophobic oxygen production molecular sieve, which comprises the following steps: S1, fully mixing a sodium metaaluminate solution, potassium hydroxide, sodium silicate and deionized water, and carrying out hydrothermal reaction and centrifugal calcination to obtain a sodium-based molecular sieve; s2, uniformly mixing the sodium-based molecular sieve and a barium chloride solution, and performing hydrothermal reaction to obtain a barium-based molecular sieve; s3, mixing and stirring the barium-based molecular sieve and a phenyltrimethoxysilane solution to obtain the barium-based hydrophobic oxygen generation molecular sieve. The hydrophobicity of the molecular sieve can be improved, and the adsorption efficiency and the service life of the molecular sieve in a high-humidity environment are effectively improved.

The invention discloses a kHz crystal frequency electronic component production process, and belongs to the technical field of electronic component manufacturing. Comprising the steps of wafer cleaning, film coating, coarse adjustment, wafer feeding, curing, frequency adjustment, press sealing, pin cutting, backflow, wafer sleeving, aging and the like. A compound cleaning solution containing potassium hydroxide, EDTA (Ethylene Diamine Tetraacetic Acid) tetrasodium, sodium silicate and methyl isobutyl ketone is adopted for wafer cleaning, and residual impurities are removed in a gradient manner through five steps of processes of pre-chelation, main cleaning, solvent replacement, weak acid washing and ultrapure water washing in combination with outlet solution monitoring; (2) pre-cleaning by argon-oxygen mixed plasma before coating, activating by pure argon, and preparing a protective film by adopting a composite barrier liquid containing KR-38S, electronic-grade nano Al2O3 and a BHT hydrogen polymerization inhibitor; in the aging stage, a nitrogen-hydrogen-argon mixed atmosphere is adopted, and a honeycomb porous guide plate made of a quartz material is matched, so that the stability of an aging environment is optimized. The technical problems of wafer cleaning hidden residues, silver layer cross-process structure damage, poor frequency stability and the like in the prior art can be effectively solved.

This invention relates to the field of mineral wool production technology, specifically disclosing a mineral wool material and its preparation method. The mineral wool material comprises the following raw material components in parts by weight: 60-65 parts of blast furnace liquid slag, and 15-25 parts of conditioning material; the conditioning material comprises 42%-48% quartz sand, 22%-28% coal gangue, 11%-18% modified basalt, and 10%-14% modified lithium feldspar powder; wherein the modified basalt is sodium silicate modified basalt; and the modified lithium feldspar powder is citric acid modified calcined lithium feldspar powder. This invention optimizes the composition of the mineral wool material and the combination of the conditioning material components, reduces the generation of loose cotton and cotton balls, and improves the cotton sizing ratio and the overall performance of the finished wool.

The application discloses an organic-inorganic composite modified concrete external curing agent and a preparation method thereof. The organic-inorganic composite modified concrete external curing agent is prepared by mixing 100-150 parts by weight of polyvinyl ether terpyridine modified styrene-acrylic emulsion, 8-16 parts by weight of sodium silicate nonahydrate, 15-30 parts by weight of polyethylene glycol, 1-1.5 parts by weight of a defoaming agent, 1-1.5 parts by weight of a leveling agent and 20-50 parts by weight of deionized water. The application is sprayed or coated on the surface of concrete, can quickly form a thin layer of dense film on the surface, has good environmental adaptability, can effectively work under various climate conditions, ensures that the internal moisture of concrete is retained, promotes the full hydration of cement, and thus improves the overall performance of concrete and prolongs the service life of concrete. Meanwhile, the cost effectiveness and environmental friendliness of the application are good, which is helpful to realize the sustainable development goal of concrete construction and maintenance.

The invention discloses a special medicament for purified cotton wastewater pollution treatment. The special medicament comprises the following components in parts by weight: 40-60 parts of modified attapulgite powder, 15-25 parts of a persulfate activator, 10-20 parts of an organic polymer compound, 8-15 parts of a mineral regulator, 2-5 parts of anhydrous sodium silicate and 3-6 parts of a hydroxyapatite whisker and calcium sulfate whisker compound. The invention also discloses a preparation method and application of the compound. According to the agent disclosed by the invention, through the synergistic effect of various functional components, the functions of advanced oxidation, adsorption bridging and flocculation settling assisting are integrated, COD (Chemical Oxygen Demand), lignin and short fiber suspended matters in the refined cotton wastewater can be efficiently removed, the formed floc is dense and high in settling speed, and the treated effluent can be recycled.

The present application belongs to the technical field of cleaning supplies, and particularly relates to a high-efficiency blood-stain removing powder and a preparation method thereof. The high-efficiency blood-stain removing powder provided by the present application comprises the following raw materials and mass fractions: 45.0-65.0 parts of sodium percarbonate, 12.0-18.0 parts of an auxiliary agent, 11.0-18.0 parts of an auxiliary cleaning agent, 4.0-7.0 parts of anhydrous sodium metasilicate, 1.0-3.0 parts of a non-ionic surfactant, 1.5-2.5 parts of an enzyme preparation, 0.2-1.0 parts of an antibacterial agent, 1.0-3.0 parts of a thickening agent, and 0.1-0.5 parts of a fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium alpha-alkenyl sulfonate at a mass ratio of 8.0-12.0:3.0-6.0. When the high-efficiency blood-stain removing powder of the present application is used, no complex operation is needed, and blood stains can be easily removed through simple soaking, without laborious scrubbing, so that the effect of 'quick cleaning and complete stain removal' is truly achieved.

The application discloses a high-concentration sulfate radical acid mine water treatment method based on acid-resistant SRB biological cathode, which comprises the following steps: after the acid mine water is filtered through a grid, the acid mine water is fed into an adjusting tank; the wastewater in the adjusting tank is fed into a biological membrane electrochemical device to perform an electrochemical reaction; in an anode chamber, Fe 2+ in the wastewater is oxidized into Fe 3+ and releases electrons; in a cathode chamber, the acid-resistant SRB bacterial membrane loaded on the surface of a carbon felt electrode utilizes the transmitted electrons to reduce SO4 2‑ into S 2‑ ; CO2 micro-bubbles are fed into the liquid in the cathode chamber to react with S 2‑ to generate sulfur precipitate, and the mixed solution after the reaction is fed into a cyclone separator to realize gas-solid separation; Fe 3+ in the water in the anode chamber generates Fe(OH)3 precipitate through a hydrolysis reaction, the Fe(OH)3 precipitate is mixed with sodium silicate, and is calcined to be converted into alpha-Fe2O3 with magnetism. The method can effectively remove SO4 2‑ and recover iron mud.

This application provides a powdered two-component rapid-setting early-strength grouting material and its preparation method, belonging to the field of grouting materials. The material consists of component A and component B in a volume ratio of (1~3):1. Component A is silicate cement slurry, prepared by mixing ordinary silicate cement and water in a water-cement mass ratio of (0.5~2.0):1. Component B is a fast-dissolving sodium silicate aqueous solution, prepared by mixing fast-dissolving sodium silicate powder and water in a mass ratio of (0.2~0.6):1. The grouting material provided by this application is easy to transport and store. Its core component is solid fast-dissolving sodium silicate, effectively avoiding the corrosiveness and storage and transportation risks of liquid water glass, significantly reducing overall costs. The fast-dissolving sodium silicate reacts rapidly with cement hydration products to form a gel, and the setting time can be flexibly adjusted by concentration and ratio, resulting in rapid and controllable setting. This material is simple to prepare, flexible in construction, requires only two raw materials, and can be prepared and used on-site, making it suitable for various grouting equipment and engineering scenarios.

This application relates to the field of road engineering materials technology, and discloses a method for preparing modified phosphogypsum base material for road engineering, comprising the following steps: mixing aged phosphogypsum with ferrous sulfate heptahydrate, sodium fluorosilicate, and manganese sulfate monohydrate, utilizing the inherent moisture of the phosphogypsum to dissolve the salts and form an acidic slurry; adding heat-curing dry powder and high-speed shearing, utilizing the heat of hydration to raise the temperature to 65℃-85℃ to create a high-temperature strong alkaline environment, initiating manganese catalytic oxidation and slag thermal etching; subsequently, high-pressure injection of a rapid cooling conditioning liquid, utilizing the latent heat of vaporization to rapidly cool to below 45℃ to complete rapid cooling quenching and slow setting locking; unloading and aging to obtain the modified phosphogypsum base material. This invention, through the release of chemical energy by quicklime hydration to construct a high-temperature strong alkaline reaction field, achieves deep mineralization of impurities and reconstruction of the cementitious material network, significantly improving the water stability and mechanical properties of the base material.

The present invention concerns an industrial chemical process (400f) and an apparatus for carrying out that process. The chemical process integrates into a single, combined method: (i) a method (303, 304) of producing iron and / or manganese from their ores, and (ii) a method (205a, 205b, 207, 208, 209) of producing an oxide or hydroxide of at least one of calcium, magnesium and iron from another ore respectively comprising a carbonate mineral of at least one of calcium, magnesium and iron. This combined method has the iron and / or manganese ore and the other ore comprising the carbonate mineral as its only essential ingredients, with common salt and / or water as optional extra ingredients. The combined method produces iron and / or manganese in elemental form, an oxide or hydroxide derived from the carbonate mineral, and oxygen as its corresponding products. If the iron and / or manganese ore also comprises a siliceous mineral, the method may also produce an alkaline mixture comprising sodium silicate as a co-product. Salt and water act as intermediaries to produce these end-products, but are only consumed if supplied in excess. An amount of sodium oxide, hydroxide and / or carbonate determined by the amount of salt consumed may be produced as a co-product, along with a corresponding amount of at least one of chlorine and hydrochloric acid. An amount of hydrogen determined by the amount of water consumed may also be produced as a co-product, along with an increased amount of oxygen. The iron, manganese and oxygen produced may all be used in steelmaking. Any excess oxygen may be safely vented to atmosphere. The oxide or hydroxide derived from the carbonate mineral may be used in cement manufacture, as a flux in steelmaking and / or as an ingredient in the manufacture of soda-lime glass. The alkaline mixture comprising sodium silicate may be used as an alkaline activator for an alkaline activated or geopolymer cement. The sodium carbonate may be used in the manufacture of soda-lime and / or borosilicate glass, for example. The chlorine and / or hydrochloric acid may be used in the manufacture of chlorinated organic compounds, for example. The hydrogen may be used as a fuel in a hydrogen economy. The method of the invention requires no nett input of heat because the chemical reactions it involves are exothermic overall. It also consumes no fossil fuels and has electricity as its only energy requirement. Thus if the electricity is produced from a source of renewable energy, this method produces no greenhouse gas emissions. In some embodiments, the method can even have a negative carbon footprint overall. The invention is intended to replace existing techniques for producing iron and / or manganese from their ores, including hydrogen-DRI, the calcination of limestone and other carbonate minerals, both in cement manufacture and in the production of lime for other purposes, and the ammonia-soda, or Solvay, process for the production of sodium carbonate. The invention therefore has the potential to eliminate up to about 20% of anthropogenic carbon dioxide emissions. [Fig. 9B]

The invention relates to the technical field of frying oil treatment, in particular to a frying oil purification method which comprises the following steps: preparing an antioxidant part; wherein the anti-oxidation piece is composed of stainless steel, a microporous silicon dioxide layer, vitamin E and a slow-release film; putting the antioxidant part into the frying oil in advance to start frying operation, after the frying operation is finished, taking out the antioxidant part, carrying out separation treatment, and removing food residues to obtain roughly filtered oil; and adding the modified adsorbent into the coarsely filtered oil, heating and stirring for adsorption and purification, taking out after adsorption and purification are finished, and filtering. Wherein the modified adsorbent is prepared from activated clay and magnesium silicate. The modified adsorbent is prepared from the activated clay, the sodium silicate and the magnesium sulfate, so that the activated clay and the magnesium silicate are compounded; wherein the activated clay is high in deacidification and decolorization capacity, the magnesium silicate is selective in depolarity and low in oil loss, and the activated clay and the magnesium silicate are compounded to complement each other in advantages, so that efficient purification of the frying oil is realized.

The invention discloses an inorganic permeable crystallization additive for concrete and a use method, and belongs to the technical field of concrete building materials, the inorganic permeable crystallization additive for concrete comprises quartz sand, a composite silicon-based material, a sodium methyl silicate crystallization precipitator, calcium hydroxide, a water reducing agent, an expanding agent, tensile fibers, cement and a fly ash mixture; the composite silicon-based material is prepared by compounding nano silicon dioxide, a POSS (Polyhedral Oligomeric Silsesquioxane) compound and a titanate coupling agent; according to the invention, by adding the tensile fibers, the concrete is prevented from plastically shrinking to generate primary micro-cracks after pouring, the fibers form three-dimensional network support in the concrete to resist shrinkage stress, and the fibers can bridge the micro-cracks, inhibit the expansion of the micro-cracks and postpone the appearance of visible cracks, so that the toughness, bending strength, fatigue resistance and impact resistance of the concrete are remarkably improved; by effectively reducing and refining cracks, a main channel for water permeation is cut off, so that the impermeability of the concrete is indirectly improved.