84 results about "Magnesium fluorosilicate" patented technology

The invention relates to a construction paint, particularly a lithium-base permeable crystallization cement sealing and solidifying agent. The cement sealing and solidifying agent is composed of 15-20 parts of sodium silicate, 8-15 parts of lithium metasilicate, 3-5 parts of magnesium fluosilicate, 2-4 parts of sodium dihydrogen phosphate, 0-6 parts of water-based color paste for paint and 50-70 parts of water. The construction technique comprises the following steps: new ground: troweling the new ground, carrying out primary hardening, coating the solidifying agent, completely drying and curing, flushing the ground with clear water, naturally drying, and sanding and polishing with a sander; and old ground: sanding and cleaning the old ground, coating the solidifying agent, naturally drying, cleaning the ground, naturally drying, and sanding and polishing (or additionally coating solidifying agent, cleaning the ground, naturally drying, and sanding and polishing). By using the solidifying agent and construction technique, the strength, hardness and compactness of the concrete are greatly enhanced, and the durability and weathering resistance of the concrete are effectively improved.

The invention belongs to the field of soil remediation and discloses a compound soil remediator and a preparation method thereof. The compound soil remediator comprises the following components in parts by weight: 13-24 parts of polyamide fibers, 5-13 parts of chitosan, 9-20 parts of sodium polyacrylate, 8-17 parts of polyethylene oxide, 5-14 parts of quicklime, 7-12 parts of magnesium fluosilicate and 4-10 parts of sodium bismuthate. The preparation method comprises the following steps: weighing the polyamide fibers, chitosan, sodium polyacrylate, polyethylene oxide, quicklime, magnesium fluosilicate and sodium bismuthate; and after uniformly mixing various components of the soil remediator, sealing to prepare the compound soil remediator.

The invention discloses a chromium base catalyst, and a preparation method and a use thereof, and belongs to the field of chemical synthesis. The precursor of the catalyst is composed of 90-99.9mass% of a trivalent chromium compound and 0.1-10mass% of a silicon-containing compound, wherein the trivalent chromium compound is chromic oxide or chromium hydroxide, and the silicon-containing compound can be zinc silicate, nickel silicate, magnesium silicate, aluminum silicate, zirconium silicate, barium silicate, bismuth silicate, ammonium fluorosilicate, nickel hexafluorosilicate, zinc fluorosilicate, magnesium fluorosilicate, aluminum fluorosilicate or calcium fluorosilicate The chromium base catalyst has the advantages of large specific surface area, effective inhibition of carbon formation, and long service life, is mainly used for gas phase catalysis of reactions for preparing hydrofluorocarbons or fluorinated alkenes from halogenated hydrocarbons or halogenated alkenes at a high temperature, and can also be used for gas phase catalysis of reactions for preparing hydrofluoroalkenes through hydrogen fluoride removal of hydrofluorocarbons at a high temperature.

The process of producing hydrofluoric acid and anhydrous magnesium sulfate with fluorosilicic acid and magnesia as material includes the following steps: 1. reacting fluorosilicic acid solution and magnesia for 10-60 min, filtering to obtain magnesium fluosilicate solution, and concentrating to obtain crystal magnesium fluosilicate hexahydrate; 2. decomposing magnesium fluorosilicate hexahydrate at 100-500 deg.c for 1-5 hr to produce solid magnesium fluoride, gaseous silicon tetrafluoride and water vapor; 3. absorbing gaseous silicon tetrafluoride and water vapor with water and hydrolyzing, and filtering to obtain fluorosilicic acid solution returned to the step 1 and silica, washing and drying to obtain carbon white; and 4. reacting the solid magnesium fluoride and 98 % over sulfuric acid, condensing the produced gas condensing and rectifying to obtain hydrofluoric acid, and obtaining anhydrous magnesium sulfate product.

The process of producing hydrofluoric acid, anhydrous magnesium sulfate and sodium fluoride with sodium fluorosilicate and magnesia as material includes the following steps: 1. decomposing sodium fluorosilicate to produce sodium fluoride product and silicon tetrafluoride gas; 2. absorbing the gas with water, filtering to prepare fluorosilicic acid solution for preparing magnesium tetrafluoride, washing silica and drying to obtain carbon white; 3. reacting fluorosilicic acid solution and magnesia, filtering to obtain magnesium fluorosilicate solution, and concentrating to obtain crystal magnesium fluorosilicate hexahydrate; 4. decomposing magnesium fluorosilicate hexahydrate to produce magnesium fluoride solid, silicon tetrafluoride gas and water vapor; 5. absorbing the gas with water and hydrolyzing, filtering to obtain fluorosilicic acid solution returned to the step 3, washing silica and drying to obtain carbon white; and 6. reacting magnesium fluoride and sulfuric acid, condensing and rectifying to obtain hydrofluoric acid, and obtaining anhydrous magnesium sulfate.

The invention discloses a polyaluminium phosphate-series chlorine-free sulfur-free liquid alkali-free accelerator and a preparation method thereof and relates to the technical field of alkali-free accelerators. The alkali-free accelerator comprises, by mass, 50-60% of phosphoric acid, 10-15% of alumina, 5-10% of magnesium fluorosilicate, 2-4% of magnesium hydroxide, 2-4% of diethanolamine, 2-6% ofa condensing agent and the balance of water. The accelerator is mainly used in shotcrete, and the use amount of the accelerator is 5 to 7% of that of a gelling material. The accelerator has good stability and does not produce layering and precipitation crystallization and use effect change after being placed at the room temperature and a low temperature (5 DEG C) for 3 months. The accelerator does not contain alkali metal ions, chloride ions and sulfate ions so that the corrosion of the steel bars in the concrete and the alkali aggregate reaction are reduced and the durability of the shotcrete is improved. Through a compatibility of the condensing agent, the compressive strength ratio measured at 28th days is greater than 100% and satisfies the requirement on the one-grade product in JC477-2005.

The present invention relates to process of preparing high purity magnesium fluoride with fluorosilicic acid and magnesia as material. The process includes the following steps: 1. reacting fluorosilicic acid solution and magnesia for 10-60 min, filtering to obtain solid magnesium fluorosilicate solution, and concentrating to obtain crystal magnesium fluorosilicate hexahydrate; 2. decomposing magnesium fluorosilicate at 100-500 deg.c for 1-5 hr to produce solid magnesium fluoride product, silicon tetrafluoride gas and water vapor; and 3. absorbing silicon tetrafluoride gas and water vapor with water and hydrolyzing, filtering to obtain fluorosilicic acid solution to be returned to the step 1 and solid silica, and washing and drying silica to obtain carbon white. The process utilizes fluorosilicic acid as one side product of phosphate fertilizer production as one main material, and has low cost and environment friendship.

The process of preparing aluminum fluoride, anhydrous magnesium sulfate and sodium fluoride includes the following steps: 1. decomposing sodium fluorosilicate to produce sodium fluoride solid and silicon tetrafluoride gas; 2. absorbing silicon tetrafluoride gas with water and hydrolyzing, and washing and drying silica to obtain carbon white; 3. reacting fluorosilicic acid solution and magnesia, filtering and concentrating to obtain crystal magnesium fluorosilicate hexahydrate; 4. decomposing magnesium fluorosilicate hexahydrate to produce magnesium fluoride solid, silicon tetrafluoride gas and water vapor; 5. absorbing silicon tetrafluoride gas and water vapor with water and hydrolyzing, and washing and drying silica to obtain carbon white; 6. reacting magnesium fluoride and sulfuric acid to produce anhydrous magnesium sulfate, condensing and rectifying to obtain anhydrous hydrofluoric acid; and 7. reacting anhydrous hydrofluoric acid and aluminum hydroxide to produce aluminum fluoride.

The invention discloses a film-forming permeable waterproof material, and a preparation method and application thereof. The waterproof material comprises a component A and a component B. The componentA comprises sodium silicate, a surfactant, a reaction retarder, a reducing agent, a reaction promoter, an anti-freezing agent, a metal ion blocking agent, a surface enhancer, an antirust agent, a photoinitiator, a cross-linking agent, water and an acrylate emulsion. The component B comprises white cement, gypsum, silica fume, mineral powder, fly ash, citric acid, magnesium fluosilicate, magnesiumoxide, sodium silicate, a reinforcing component and fumed silica. The film-forming permeable waterproof material is suitable for various environments, can achieve a good waterproof effect on buildingstructures in any environment, and can form a seamless complete high-strength waterproof coating film to prevent leakage; large-scale machining is not needed, the production efficiency is high, the investment is small, the construction is convenient, heating and boiling are not needed, environmental protection and no pollution are realized, and the labor cost is greatly reduced.

The invention discloses a low-alkali setting accelerator and a preparation method thereof. The low-alkali setting accelerator is prepared from aluminum sulfate, sodium metaaluminate, magnesium fluosilicate, hydrofluoric acid, triethanolamine, a stabilizer, an inorganic modified material and water. The preparation method comprises the following steps: 1, mixing aluminum sulfate I, sodium metaaluminate and water I to obtain a solution I; 2, sequentially adding magnesium fluosilicate and hydrofluoric acid into the solution I to obtain a solution II; 3, mixing aluminum sulfate II, water II and thesolution II to obtain a solution III; and 4, mixing aluminum sulfate III, triethanolamine, a stabilizer, an inorganic modified material and the solution III. The low-alkali setting accelerator provided by the invention has good low-temperature stability, and still has short setting and hardening time and good strength at a low temperature.

The invention discloses an early strength agent and application thereof in a concrete material. The early strength agent comprises the following components in parts by weight: 30-50 parts of magnesiumfluosilicate, 14-20 parts of lithium sulfate, 15-25 parts of sodium sulfate, 15-25 parts of sodium nitrite and 55-75 parts of pre-hydrated cement particles. The preparation method of the pre-hydratedcement particles comprises the following steps: uniformly stirring 80-120 parts by weight of cement and 20-40 parts by weight of water, granulating, maintaining for 28-30 days, carrying out ball milling, and screening with a 200-300-mesh sieve to obtain the pre-hydrated cement particles. The performance of the early strength agent can be remarkably improved and the hardening time can be shortenedby the self-making pre-hydrated cement particles and combining the pre-hydrated cement particles with other components, and the early strength agent has a remarkable effect of enhancing the later strength of a cement base material, does not shrink and meets the requirements on the service strength and durability of concrete.

The invention relates to the technical field of building materials, and aims to provide a two-component crack repairing agent which comprises, by mass, 10% to 25% of sodium silicate solution, 5% to 14% of zinc chloride solution, 0.1% to 1% of surfactant, 3 .5% to 8% of silane coupling agent, 6% to 25% of ethanol, 1% to 4% of ammonia water, 10% to 25% of magnesium fluorosilicate solution, 8% to 14%of aluminium oxide sol, 0.5% to 5 % of nano-rigid particles and the balance being distilled water. According to the principle of dual system reaction reinforcement, that is, alkaline system reacts with acidic system to further strengthen the matrix material, the material at the repair site is more firmly combined with the surrounding matrix material; as reaction products of aluminum oxide oil canharden and reinforce concrete and rigid nanoparticles can also improve hardness of concrete, the overall performance is improved. The two-component crack repairing agent has simple preparation process, can be directly rolled or sprayed to the surface of concrete in large area for construction, has no pollution to the environment, needs simple raw materials and low cost, and is especially suitablefor large-scale industrial production.

The invention discloses an addition combination agent of a rapid powder repairing material and application of the addition combination agent in cement concrete. The addition combination agent is prepared from 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide. The materials are placed in a ball milling tank, the ball-to-material ratio is (20-30): 1, ball milling is conducted for 1-2 h at 300-500 rpm under the protection of argon, the particle size of ground powder is 200-300 meshes, and the additive combination agent of the rapid powder repairing material is obtained; the method comprises the following steps: mixing the additive combination agent of the powder rapid repairing material with water and diethanol amine according to a mass ratio of (400-600): (200-300): (20-30), and then mixing the mixture with cement according to a mass ratio of (6-8): 100. According to the invention, aluminum sulfate is taken as a main component and is combined with other components, and a nano silicon dioxide material with a huge specific surface area can provide crystallization nucleation points for hydration products of cement, has an effect of promoting early hydration, can fill nano-scale pores of a cement material, improves the compactness of an internal structure and meets the requirements of strength and durability of the cement.

The invention provides a hazardous chemical substance-free magnesium-aluminum fluoride system alkali-free accelerator which comprises the following components in parts by weight: 40-55 parts of aluminum sulfate, 0-15 parts of magnesium sulfate, 3-8 parts of magnesium fluosilicate, 0.5-1.5 parts of magnesium hydroxide, 0-8 parts of cryolite, 1-14 parts of amine compounds and 20-30 parts of water. According to the hazardous chemical substance-free magnesium-aluminum fluoride system alkali-free setting accelerator provided by the invention, the reaction system reaction can achieve the dissolutionreaction, and the prepared accelerator does not contain hydrofluoric acid and fluosilicic acid, so that harmful gas cannot be generated during the construction process, the influence of the harmful gas on the health of the construction personnel is avoided, the pollution of the harmful gas on the air is avoided, and the safety and the environmental protection are provided.

The invention discloses a concrete anti-carbonization inhibitor and a preparation method thereof, and relates to the technical field of concrete surface protection. The anti-carbonization inhibitor comprises a film-forming agent, a film-forming accelerant, a CO2 absorbent, a hole sealing agent and a penetrating agent; wherein the film forming agent is one or more of magnesium fluosilicate, sodium fluosilicate and gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane; the film-forming accelerant is one or more of lithium silicate, sodium silicate and potassium silicate; the CO2 absorbent is one or more of potassium carbonate, sodium carbonate, triethanolamine and 2, 2-dihydroxydiethylamine; the hole sealing agent is modified silica sol; and the penetrating agent is one or more of hexadecyl trimethyl ammonium bromide, hexadecanol polyoxyethylene ether dimethyl octyl ammonium chloride and octadecyl dimethyl benzyl ammonium chloride. According to the concrete anti-carbonization inhibitor, the raw materials are easy to obtain, the preparation process is simple, CO2 can be physically isolated, CO2 diffused to the surface of concrete can be absorbed, and concrete carbonization inhibition dual protection is achieved.

The invention discloses a special curing agent for indoor corundum ground, and a construction process thereof, wherein the special curing agent is dry powder and contains sodium silicate, lithium silicate, magnesium fluorosilicate hexahydrate and IP Clean HX. The construction process comprises: S1, substrate treatment; S2, grinding sheet selective test; S3, ground rough grinding; S4, treatment ofspecial curing agent; S5, primary soaking; S6, middle grinding of the ground; S7, watering curing; S8, secondary soaking; S9, ground surface polishing; and S10, cleaning with felt and clear water, wherein the ground is used after the ground is dried. According to the present invention, the special curing agent is used based on the corundum ground, and the professional construction process is supplemented, such that the special curing agent and the ground concrete completely react, and the obtained corundum ground has advantages of good wear resistance and high density.

The invention discloses anti-crack anti-permeation high-durability concrete and a preparation method thereof, relates to the field of concrete, and aims to solve the problem that durability indexes such as crack resistance and permeation resistance of concrete in the prior art are difficult to realize. The concrete is prepared from the following components in parts by weight: 500 to 750 parts of cement, 70 to 85 parts of water, 600 to 680 parts of sand, 1200 to 1450 parts of gravel, 750 to 800 parts of recycled coarse aggregate, 500 to 575 parts of fine aggregate, 25 to 30 parts of silicon powder, 15 to 20 parts of boron nitride powder, 35 to 40 parts of fly ash, 25 to 30 parts of aluminum oxide, 15 to 30 parts of calcium chloride, 45 to 50 parts of silicate, 15 to 20 parts of additive, 60 to 75 parts of sodium silicate, 20 to 25 parts of sodium fluosilicate, 20 to 25 parts of magnesium fluosilicate, 20 to 50 parts of accelerant, 35 to 50 parts of polypropylene fiber, 25 to 40 parts of calcium formate and 50 to 75 parts of sealing curing agent; wherein the additives comprise a water reducing agent, an air entraining agent, a retarder, an early strength agent, an anti-freezing agent and an expanding agent.

The invention relates to the field of accelerators, and particularly discloses an alkali-free accelerator which is prepared from the following raw materials in parts by mass: 360-380 parts of aluminum sulfate; 30 to 50 parts of magnesium fluosilicate; 15-20 parts of phosphoric acid; 65-80 parts of sodium sulfate; 38 to 46 parts of alcohol amine; 55 to 70 parts of a coagulation accelerator; 1-5 parts of xanthan gum; and 180 to 220 parts of water. The invention also discloses a preparation method of the alkali-free accelerator, which comprises the following steps: (1) adding water, sodium sulfate and the accelerator according to the formula to obtain a premix; (2) heating the reaction kettle to 48-52 DEG C, and adding magnesium fluosilicate, aluminum sulfate and xanthan gum into the premix; (3) heating the reaction kettle to 65-70 DEG C, and dropwise adding phosphoric acid and alkylol amine into the reaction kettle; and (4) cooling to normal temperature to obtain the alkali-free accelerator. The alkali-free accelerator provided by the invention can be applied to concrete. The accelerator has the effect of improving the stability of the accelerator.

The invention belongs to the technical field of chemical etching, and particularly relates to a glass etching solution and a method for imitating ceramic furnace transmutation ice flower effect glassby adopting the etching solution. The glass etching solution comprises the following raw materials in percentage by weight: 18-25% of ammonium fluoride, 6-10% of ammonium fluosilicate, 2-6% of magnesium fluosilicate, 15-20% of sulfuric acid, 3-8% of acetic acid, 5-10% of sodium chloride, 3-8% of lead nitrate, 1-3% of sodium pyrophosphate, 1-3% of copper sulfate, 0.5-2% of sodium gluconate, 0.5-2.5% of lauryl sodium sulfate, 0.2-0.5% of polyacrylamide, 0.1-0.3% of maltodextrin and the balance of water. According to the etching solution, acid etching treatment is carried out on the surface of the glass so that ice flower-shaped crystals which are different in shape and ever-changing are formed on the surface of the glass.

The invention discloses an alkali-free concrete accelerator and a processing method thereof. The alkali-free concrete accelerator comprises the following raw materials in parts by weight: 30-65 partsof aluminum sulfate, 2-8 parts of an organic amine, 1-3% of a stabilizer, 1-5 parts of a suspending agent, 20-35 parts of water, 2-5 parts of bentonite and 4-6% of magnesium fluosilicate. In the present invention, the caulking agent for building decoration of prefabricated parts is simple in preparation method, low in cost, is liquid after preparation, can be uniformly mixed with concrete conveniently, contains no alkali or chlorine or pungent smell, is high in safety, is harmless to human body, is excellent in cohesiveness; adding of a stabilizing agent can prolong the storage time, preventdeterioration; magnesium fluosilicate and aluminum sulfate are adopted for cooperative using, so that the resilience value is low, later strength retention rate is high, and impermeability grade is high; adding of the alkali-free concrete accelerator in sprayed concrete is capable of achieving a preferable working environment and considerable market value.

The invention discloses a special curing agent for indoor cement ground, and a use method thereof. In the prior art, the general cement curing agent is not suitable for different grounds with different active ingredients, and the reaction is insufficient. A purpose of the present invention is to solve the problems in the prior art. The technical scheme of the present invention is that the specialcuring agent is dry powder, and contains sodium silicate, lithium silicate, magnesium fluorosilicate hexahydrate and isoparaffin. According to the present invention, the special curing agent is the dry powder, does not contain water, and can be added with water according to a certain ratio before the use, such that the ratio of various components can be easily and flexibly adjusted according to the ground conditions; the dry powder has advantages of light mass, convenient carrying, convenient transportation, easy sealing during the transportation and less leakage; and the special curing agenthas the long shelf life, and various components of the special curing agent are not easily subjected to coordinating and other reactions.

The invention discloses a concrete structure self-compacting waterproofing agent as well as a preparation method and application thereof. The concrete structure self-compacting waterproofing agent isprepared from the following components in parts by weight: 10-12 parts of magnesium fluosilicate, 5-8 parts of a dispersing agent, 6-7 parts of ammonia water, 0.6-0.8 part of a preservative, 110-120 parts of water, 3-5 parts of molten aluminum, 3-5 parts of a defoaming agent and 4-6 parts of stearic acid. When the concrete structure self-compacting waterproof agent is applied, the concrete structure self-compacting waterproof agent only needs to be sprayed on the surface of concrete, the spraying amount is 0.2-0.4 kg/m <2>, with wetting kept for 0.3-0.4 h; the surface of the concrete fully absorbs the concrete hardening waterproof agent, and the concrete hardening waterproof agent can permeate by 0.8-1.2 cm; and still standing is conducted for 14-16 h, and a strength waterproof sealing effect can be shown.

The invention relates to a water-based two-component concrete sealing curing agent, and solves the problem that the performance of the existing curing agent needs to be further improved. According to the technical scheme, the coating comprises a component A and a component B, the component A comprises a sodium silicate solution, a potassium silicate solution, a penetrating agent, an accelerant, a waterproof agent and water, and the component B comprises magnesium fluosilicate, a hydrochloric acid solution and water. The curing agent is low in cost, good in stability, high in cost performance, high in strength and high in wear resistance.

The invention relates to the technical field of building materials, particularly to a waterproof alkali-liquid-free quick-setting agent having water reducing function, and a preparation method thereof, wherein the raw materials comprise, by weight, modified aluminate, aluminum hydroxide, a stabilizer, a pH value adjuster, ethanolamine phosphate, magnesium fluorosilicate, sodium lignosulfonate, andthe balance of water. According to the present invention, the performances of the quick-setting agent are optimized by using the inorganic-organic material compounding technology and the quick-setting agent modification technology, such that the obtained quick-setting agent integrates the advantages of rapid setting, no alkali, good stability, high early strength and late strength maintaining, further has water reducing function and waterproof function, can make the prepared shotcrete useful, and can be widely used in the fields of bridges, tunnels, underground engineering and the like.