1352 results about "Silicate" patented technology

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention provides a thermal response self-ceramization fireproof coating and a preparation method thereof. The thermal response self-ceramization fireproof coating is prepared from the following raw materials in parts by mass: 3 to 10 parts of acrylic monomer, 3 to 10 parts of organic sulfonate, 1 to 4 parts of silane coupling agent, 0.5 to 3 parts of silicate ester, 4 to 6 parts of ceramic precursor, 3 to 6 parts of fluxing agent and 0.05 to 0.4 part of initiator. The fluxing agent comprises a component A and a component B, the component A is one of boric oxide, zinc borate or low-melting-point glass powder, and the component B is one of phosphorus pentoxide and ammonium polyphosphate. The silane coupling agent can be copolymerized with an acrylic monomer to construct a C-C main chain, the C-C main chain and silicate ester are subjected to hydrolytic condensation to form a Si-O-Si three-dimensional network, a chemical cross-linked skeleton is formed, and the chemical cross-linked skeleton can generate silicon dioxide at high temperature to participate in a ceramization reaction; the ceramic precursor and silicate ester can form a strong physical cross-linking effect, so that the fireproof coating with a chemical and physical double-cross-linked network can be formed, and the fireproof coating has excellent mechanical property and machinability at normal temperature.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention discloses an alkali-free accelerator and a preparation method and application thereof in the technical field of concrete additives, and the alkali-free accelerator provided by the invention comprises the following components in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.2%-0.6% of diethanol amine, 0.5%-1% of catechol-4-ammonium sulfonate, 5%-10% of a stabilizer and the balance of water. The stabilizer comprises silicate dispersion liquid and silica sol. The alkali-free accelerator provided by the invention can be used for spraying concrete, the mixing amount of the alkali-free accelerator is generally 4-6% of the mass of cement, the alkali-free accelerator is good in rapid setting effect and has excellent early and later compressive strength, and meanwhile, the alkali-free accelerator has relatively excellent stability.

The invention provides a gradient self-repairing sealing coating and a preparation method thereof, and relates to a high-temperature protection material. The gradient self-repairing sealing coating comprises a bonding layer, a gradient middle layer, a transition layer and an abradable surface layer which are sequentially arranged from a base body to the surface. A bonding layer in the gradient self-repairing sealing coating contains silicate, so that the bonding strength and the heat-resistant stability of a matrix are improved; rare earth silicate and Ir elements are introduced into the gradient intermediate layer, so that high-temperature corrosion resistance is enhanced, and thermal stress is relieved; the transition layer contains zirconium oxide and graphene and has the functions of thermal isolation and stress regulation; the abradable surface layer is formed by combining rare earth silicate and graphite, low friction and preferential abrasion are achieved, and effective sacrifice protection is provided. The overall structure can have multiple properties of heat, corrosion resistance and abrasion resistance, and is suitable for the surface protection requirement under the complex hot end working condition.

The invention discloses a fluoride-salt-free and nitrate-free cast iron enamel zirconium white glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The zirconium white glaze is prepared from quartz, borax pentahydrate, magnesium carbonate, potassium carbonate, potassium feldspar, zinc oxide, aluminum hydroxide, calcium carbonate, zirconium silicate, sodium tripolyphosphate and lithium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The zirconium white glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, and meanwhile, the zirconium white glaze has good porcelain surface, luster and firing adaptability, is suitable for cast iron matrixes, has the firing temperature of 740-760 DEG C and the firing time of 87-87 hours, and can be widely applied to cast iron substrates. The method can be used for producing green and environment-friendly enamel products.

The invention belongs to the technical field of drilling fluid processing, and particularly relates to a special silicate water-based drilling fluid for a coal-bed gas well as well as a processing method and a processing device of the special silicate water-based drilling fluid. The top end of the stirring tank is communicated with a first feeding hole and a second feeding hole, and the bottom end of the stirring tank is communicated with a discharging pipe; a rotating shaft is rotationally connected to the top surface of the inner wall of the stirring tank, and a sliding groove is formed in the bottom surface of the rotating shaft; a rotating shaft is driven by a first motor to rotate, and the rotating shaft drives a connecting shaft to rotate, so that fresh water and additives in a stirring tank are stirred and mixed by stirring blades, and a first screw rod can be driven by the first motor to positively and negatively rotate in a reciprocating manner in the mixing process; the first screw rod drives the connecting shaft to move up and down in the sliding groove, so that the stirring blades move up and down, the stirring blades stir and mix the water and the additive while moving, and the mixing efficiency and uniformity of the additive and the water are improved.

The invention discloses a preparation process of a concrete self-healing crystallization additive, and belongs to the technical field of building materials, and the preparation process comprises the following steps: respectively grinding 30-60 parts of refined silica powder and 20-40 parts of quartz sand, then adding 30-60 parts of refined silica powder and 20-40 parts of quartz sand into a mixing barrel in a dryer, then adding 8-20 parts of silicate, and drying for 3-5 minutes; then taking out the mixing barrel and putting into a mixing machine for mixing; sequentially adding 1-3 parts of an alkali metal salt compound into the mixture in the step 1 every 5-10 minutes, mixing for 5-10 minutes, and adding for 4 times in total; 2, 2-4 parts of a functional auxiliary agent is added into the mixture obtained in the step 2, mixing is conducted again for 10-15 min, standing is conducted for 50-80 min after mixing is completed, and the self-healing crystallization additive is obtained; according to the invention, the added silicate and alkali metal salt compound is dissolved in mixed concrete under the action of contacting with water and permeates in pores and microcracks of the concrete along with the water, so that the body impermeability and compactness of the concrete are improved.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

The invention provides a method for quality-divided regeneration of silicon dioxide from ardealite by using a flotation and acid leaching coupling melting purification technology, and relates to the technical field of regeneration of silicon dioxide from ardealite, the method comprises the following steps: S1, adding a nonionic collecting agent into ardealite ore pulp for reverse flotation to obtain rough machining ardealite; s2, carrying out direct flotation on the rough machining ardealite obtained in the step S1 to obtain silicon ardealite tailings; s3, drying and crushing the silicon phosphogypsum tailings, uniformly mixing the silicon phosphogypsum tailings with a washing agent, and acidizing to remove impurities, so as to obtain silicate; and S4, adding the silicate obtained in the step S3 into a dissolving agent, reacting to obtain silicon dioxide colloid, and calcining to obtain silicon dioxide with the purity as high as 99.9%.

The invention discloses low-carbon red-mud-based alkali-activated foam concrete and a preparation method thereof, and belongs to the field of low-carbon foam concrete. Specifically, the mix proportion and the preparation method of the low-carbon red-mud-based alkali-activated foam concrete are as follows: P.O42.5 ordinary Portland cement provided by building materials in Qingdao Weidong macro, the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd., and Jinshu New Material Co., Ltd., the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd. The Bayer process red mud powder is produced by Hebei Province Shihozhuangfei Mine Product Co., Ltd. The exciting agent is selected from an industrial liquid sodium silicate solution produced by Henan Jinmoistening New Material Co., Ltd. And solid sodium hydroxide particles with AR analytical purity of 96%; the admixture is selected from a TR-26C type polycarboxylate superplasticizer produced by Henan Fuhua Information Science and Technology Co., Ltd. And the foaming agent is a TR-E type animal protein foaming agent produced by Henan Zhuichun Information Science and Technology Co., Ltd. Compared with existing foam concrete, the low-carbon alkali-activated foam concrete provided by the invention uses a large amount of industrial solid waste, reduces the use cost, reduces the use amount of cement under the condition of ensuring the compressive strength, and is simple and convenient to operate, reasonable in process, low-carbon, environment-friendly, rapid in cement setting and hardening, and suitable for large-scale use.

The invention provides anti-erosion hydraulic concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete comprises the following components: composite cement, high-activity nano-modified metakaolin, blast furnace slag powder, low-calcium fly ash, coarse aggregate, natural river sand fine aggregate, granite machine-made sand fine aggregate, an erosion inhibitor, a functional additive, an early-strength polycarboxylic high-performance water reducer, a composite air entraining agent and the like. The composite cement comprises sulphoaluminate cement, Portland cement and polymer waterproof mortar. The high-activity nano modified metakaolin is obtained by modifying metakaolin with an organic silicon-ZnO composite emulsion and then drying. The erosion inhibitor comprises organic carboxylate, a hydrophobic-crystallization complexing agent and a pH buffer type corrosion inhibitor. The functional auxiliary agent comprises an itaconic acid and acrylic acid copolymer, a JRY-F concrete waterproof agent and polyethylene glycol-400 dilaurate. The composite air entraining agent comprises liquid sodium abietate and sodium alpha-olefin sulfonate. Through component synergism, modification and grading, an anti-erosion barrier is constructed.

The invention discloses a wear-resistant high-gloss nano liquid, a wear-resistant high-gloss ceramic tile and a preparation method of the wear-resistant high-gloss ceramic tile, and belongs to the technical field of ceramic manufacturing. The wear-resistant high-gloss nano liquid at least comprises a component A, a component B and a component C which are independently subpackaged, wherein the component A comprises large-particle silica sol, boric acid, sodium methyl silicate, carboxymethyl cellulose sodium, a boronizing stabilizer and the balance of water; the component B comprises a boronizing stabilizer and the balance of water-based modified silicone oil; and the component C is wax emulsion. Through systematic material and process innovation, the ceramic tile which is high in gloss, strong in antifouling property, durable in wear resistance and high in transportation performance is prepared, and the market requirements of surface treatment materials which are high in performance, low in cost and easy to transport are met.

A method of making a silver-silicalite coating on a surface of a stainless-steel substrate is provided. The method includes mixing metakaolin with an aqueous solution of NaOH to form a first mixture. The method further includes mixing silica gel and silver nitrate with the first mixture to form a second mixture. Furthermore, the method includes mixing Zeolites Socony Mobil-5 (ZSM-5) with the second mixture to form a third mixture. The method further includes hydrothermally treating the stainless-steel substrate with the third mixture to form the silver-silicalite coating on the surface of the stainless-steel substrate. The hydrothermal treatment is carried out in the absence of an organic template. The stainless-steel substrate coated with the silver-silicalite coating, prepared by the method of the present disclosure, has lower corrosion in comparison to the same stainless-steel substrate without the silver-silicalite coating.

The invention discloses an efficient lithium slag solidification and stabilization agent and a preparation method thereof. The efficient lithium slag solidification and stabilization agent comprises the following raw materials in parts by weight: 20-50 parts of lithium slag, 5-10 parts of carbide slag, 8-12 parts of nano silicate, 6-12 parts of slag powder, 3-6 parts of hydroxyapatite, 2-5 parts of bentonite, 4-8 parts of fly ash and 1-3 parts of aluminum sulfate. The method disclosed by the invention has the advantage of environmental protection, and solves the problems that when the existing lithium slag is recycled, the lithium slag is inconvenient to solidify and stabilize, the lithium slag often contains heavy metals, and if the lithium slag is not fixed in a lattice structure through solidification and stabilization technologies, the heavy metals can be leached along with rainwater to enter soil and water, and long-term ecological pollution is caused.

Coating compositions prepared from an aqueous formulation of (1) one or more metal silicates, (2) one or more metal oxides, (3) one or more water soluble caustic agents; and (4) water are disclosed to form fire resistant coatings. In some implementations, the coating composition can be free of, or substantially free of, large solid particles comprised of the metal silicate, metal oxide and water-soluble caustic agent.

A beneficiation method for improving a grade of a magnesium-containing copper sulfide ore concentrate includes: crushing and grinding an ore to a fineness degree allowing 55% to 65% of particles to pass through a 0.074 mm sieve, adding an adjusting agent lime, collecting agents butylxanthate and kerosene, and a foaming agent methyl isobutyl carbinol (MIBC) to obtain a copper-molybdenum-sulfur mixed concentrate; re-grinding the copper-molybdenum-sulfur mixed concentrate to a fineness degree allowing 75% to 82% of particles to pass through a 0.048 mm sieve, adding lime, a magnesium-containing silicate inhibitor, a collecting agent 1, and MIBC to obtain a copper-molybdenum mixed concentrate; and adding sodium sulfide, kerosene, and MIBC to the copper-molybdenum mixed concentrate to obtain a high-grade copper concentrate. The beneficiation method adopts mixed flotation of copper-molybdenum, regrinding for separating copper and molybdenum from sulfur, and magnesium removal from a copper concentrate to allow quality improvement for the copper concentrate.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The invention belongs to the technical field of carbon-coated lithium ferrous silicate, and discloses a preparation method and application of carbon-coated lithium ferrous silicate, the preparation method of carbon-coated lithium ferrous silicate comprises the following steps: S1, adding a surfactant into a silicon source to obtain a solution A; s2, sequentially adding an iron source and a lithium source into the solution A, and uniformly mixing to obtain a carbon-coated lithium ferrous silicate precursor; s3, carrying out high-temperature sintering on the carbon-coated lithium ferrous silicate precursor to obtain carbon-coated lithium ferrous silicate; the surfactant in the step S1 is a block type polyurethane surfactant, and a hydrophilic part structure in the block type polyurethane surfactant comprises polyethylene glycol PEG and 2, 2-dimethylolbutyric acid DMBA. According to the preparation method of the carbon-coated lithium ferrous silicate, the block type polyurethane surfactant is adopted in the step S1 and is not only used as a surfactant, but also used as a reducing agent and a carbon source, and a carbon coating layer of the prepared carbon-coated lithium ferrous silicate is uniform in thickness and excellent in electrochemical performance.

The invention relates to chemical-corrosion-resistant full-polished glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic production and manufacturing. The chemical-corrosion-resistant fully-polished glaze comprises the following mineral components in percentage by mass: 5%-10% of quartz, 5%-10% of kaolin, 1%-10% of calcined talc, 20%-25% of wollastonite, 10%-20% of calcined kaolin, 1%-5% of calcined alumina, 1%-5% of calcined zinc oxide, 1%-5% of barium carbonate, 1%-3% of titanium oxide, 1%-5% of zirconium silicate and 10%-20% of boron frit. By specially designing a full-polishing glaze formula of the ceramic tile, adjusting the firing temperature and discharging or reducing defects such as air holes in a glaze layer as much as possible, the glaze layer forms a stable inert surface, and chemical substances cannot react with the glaze layer or only slightly react with the glaze layer, so that the transparency, integrity and glossiness of the surface are kept.

The invention provides a water-resistant building gypsum-based material and a preparation method thereof. The material comprises a building gypsum base body, a hydrophobic film is cured on the surface of the building gypsum base body, and the hydrophobic film is formed by curing waterproof liquid; the building gypsum base body is prepared from four components including desulfurized building gypsum, blast furnace slag, calcium oxide and water, the water-binder ratio is 0.5-0.6, the mass ratio of the blast furnace slag to the desulfurized building gypsum is (1-5): (5-9), and the mass of the calcium oxide is 2%-10% of that of the blast furnace slag; the waterproof liquid comprises water, sodium methyl silicate, tetraethoxysilane, dimethyl silicone oil, sodium hydroxide and sodium silicate. According to the preparation method, a proper waterproof treatment mode is selected according to the size of a workpiece. The blast furnace slag and the calcium oxide are introduced into the desulfurized building gypsum formula, the calcium oxide can effectively excite the activity of the blast furnace slag in a building gypsum matrix, so that the water resistance of a building gypsum-based material is improved, the water resistance of the material is further improved by the waterproof liquid, and meanwhile, the material is endowed with hydrophobicity.

The invention provides a polysilicate aluminum zirconium coagulant as well as a preparation method and application thereof, and relates to the technical field of solid waste recycling. The preparation method of the polysilicate aluminum zirconium coagulant comprises the following steps: S1, activation preparation of a polysilicate solution; S2, introduction and pre-complexation of a metal salt solution; and S3, alkalization induced polymerization and curing. According to the invention, the efficient charge neutralization capability of zirconium and aluminum metal ions and the long-chain network structure characteristic of polysilicic acid are organically combined through a copolymerization reaction by molecular design, the developed polysilicate aluminum zirconium coagulant can maintain a good coagulation effect in a wide pH range, is suitable for treating residual sludge with different sources and properties, and has a good coagulation effect under the dosage of 7.5%. The CST value is reduced to 35.4 s from 190.7 s, the water content of a filter cake is reduced to 77.4%, and the Zeta potential is-8.2 mV, so that the polysilicate aluminum ferric coagulant is obviously superior to a traditional polysilicate aluminum ferric coagulant, and has the advantages of high operation flexibility, good process stability and good application prospect.

The invention relates to the technical field of concrete, and provides ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete is prepared from the following raw materials in parts by weight: 70 to 80 parts of Portland cement, 15 to 25 parts of silica fume, 5 to 10 parts of limestone, 2 to 5 parts of metakaolin, 100 to 120 parts of quartz sand, 24 to 42 parts of hydroxylated steel fiber, 6 to 24 parts of carboxylic butadiene-acrylonitrile latex, 2.0 to 3.5 parts of a water reducing agent and 15 to 22 parts of water. Through the technical scheme, the problem of poor chloride ion permeability resistance of the ultra-high performance concrete in the prior art is solved.

The invention discloses a process method for preparing aerogel by using gasified slag through a wet process, which realizes high-valued resource utilization of solid wastes, reduces production energy consumption and production cost, and reduces the influence on the environment at the same time. According to the method, the activated silicon-rich waste residues are adopted as raw materials, original crystalline phase silicon in the activated silicon-rich waste residues is converted into active amorphous silicate, the active amorphous silicate can efficiently react with alkali liquor under the low-temperature and normal-pressure conditions to generate a sodium silicate solution, dependence on a high-energy-consumption roasting process is eliminated, energy consumption is reduced by 40% or above, meanwhile, a large number of impurities and metal ions do not exist, and the method is environmentally friendly. The preparation method comprises the following steps: performing alkaline leaching on activated silicon-rich waste residues to obtain a sodium silicate solution which does not need secondary concentration, performing sol-gel reaction, aging reaction, solvent exchange reaction and hydrophobic modification treatment, and finally performing washing and drying to synthesize the hydrophobic silicon dioxide aerogel with high additional value. And the silica aerogel with different densities and specific surface areas is prepared by adjusting parameters such as aging time, aging temperature, modifier concentration and the like.

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 application provides an oilfield produced water treatment method. The method comprises the following steps: adding a polymeric aluminum ferric silicate solution into oilfield produced water to be treated, and stirring for a period of time at a first rotating speed; increasing the first rotating speed to a second rotating speed, adding a polyacrylamide solution, stirring for a period of time at the second rotating speed after the addition is completed, and then standing for a period of time; and filtering to obtain treated oilfield produced water. The method has the advantages of simplicity, high efficiency, low cost, easy operation, remarkable treatment effect and the like.

The invention relates to a fiber with improved thermal insulation properties comprising a polymeric fiber base material and a microporous material in particle form, wherein the microporous material comprises an agglomerate of precipitated insoluble amorphous metal silicates, in particular precipitated silicon dioxide. The invention further includes a method for producing a fiber with improved thermal insulation properties.

The invention discloses a halogen-free flame-retardant nylon composite material and a preparation method thereof. The composite material comprises 61.5-90% of nylon resin, 0.2-1.5% of a phosphorus-nitrogen-silicon flame retardant, 5-20% of a silicate and beta-nucleating agent compound, 5-15% of a dynamically vulcanized elastomer, 0.1-2% of a light stabilizer and 1-3% of a nanoscale inorganic filler. The phosphorus-nitrogen-silicon flame retardant is composed of ammonium polyphosphate, melamine silicate and nano silicon dioxide, and melamine cyanurate is synthesized in situ in the twin-screw extrusion process. The preparation method comprises the steps of precise temperature control extrusion, three-zone in-situ reaction, nanofiller vacuum dehydration and NIRS real-time drying monitoring. The material has high flame retardance, excellent electrical property and mechanical strength, is suitable for electric vehicle battery shells, rail transit high-voltage connectors and aerospace interior trim parts, and meets the requirements of high safety and high reliability.

The invention relates to the technical field of dechlorinating agents, in particular to a dechlorinating agent and a preparation method thereof. The preparation method of the dechlorinating agent comprises the following steps: 1) uniformly mixing quaternary ammonium salt and organic amine, then adding silicate ester, uniformly mixing, reacting for 2-6 hours, carrying out solid-liquid separation, washing a solid, and drying; 2) roasting the solid dried in the step 1) at 550-650 DEG C for 5-10 hours, and cooling to obtain a carrier; 3) uniformly mixing the carrier prepared in the step 2) with a calcium source and a zinc source in water, adjusting the pH value to 10-12, reacting, standing, carrying out solid-liquid separation, and drying the solid, and 4) calcining the dried solid in the step 3) at 800-1000 DEG C for 10-24 hours, and cooling to obtain the dechlorinating agent. The prepared dechlorinating agent is uniform in pore diameter and high in penetrating chlorine capacity, and can effectively reduce the loss of active ingredients.