19 results about "Potassium aluminate" patented technology

The invention discloses a magnesium alloy micro-arc oxidation electrolyte which comprises sodium metaaluminate, sodium hydroxide, sodium fluoroaluminate, aluminum fluoride and glycerol. The content of sodium metaaluminate is 5-25 g / L, the content of sodium hydroxide is 1-3 g / L, the content of sodium fluoroaluminate is 0.3-0.7 g / L, the content of aluminum fluoride is 0.2-0.3 g / L, and the content of glycerol is 1 g / L. The magnesium alloy micro-arc oxidation electrolyte comprises potassium metaaluminate, potassium hydroxide, potassium fluoroaluminate, aluminum fluoride and glycerol, the content of potassium metaaluminate is 10-20 g / L, the content of potassium hydroxide is 3-5 g / L, the content of potassium fluoroaluminate is 0.5-0.7 g / L, the content of aluminum fluoride is 0.3-0.5 g / L, and the content of glycerol is 1 g / L. The invention further discloses the magnesium alloy hard ceramic membrane and a preparation method thereof. According to the preparation method of the magnesium alloy hard ceramic film, the components and the microstructure of the magnesium alloy micro-arc oxidation film layer are changed, and meanwhile the hardness and the corrosion resistance of the magnesium alloy micro-arc oxidation film layer are improved.

The invention belongs to the technical field of building materials, and provides an early-strength cement-based grouting material and a preparation method thereof.The early-strength cement-based grouting material is prepared from, by weight, 500-600 parts of sulphoaluminate cement, 200-300 parts of Portland cement, 40-100 parts of lithium slag, 1-3 parts of a coagulant, 0.5-1 part of an early strength agent, 5-8 parts of a water reducing agent, 0.5-2.5 parts of a thickening agent, 0.3-0.9 part of a defoaming agent and 260-310 parts of water; the coagulant is sodium metaaluminate and / or potassium metaaluminate; the early strength agent is selected from one or more than two of lithium carbonate, lithium sulfate, calcium formate, calcium acetate, calcium propionate, calcium butyrate and nano silicon dioxide. According to the technical scheme, the problems of poor dispersion resistance and low early strength of a cement-based grouting material in a flowing water environment in the prior art are solved.

The invention provides a potassium chloroaluminate fused salt and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing dried AlCl3 and KCl raw materials, adding into a crucible, and heating to melt the mixed raw materials in the crucible to form an AlCl3-KAlCl4 mixed fused salt; the method comprises the following steps: adding a small amount of KCl into molten salt for multiple times until no volatile matter is generated in a crucible to form KAlCl4 molten salt, and carrying out hot filtration on the pure KAlCl4 molten salt to obtain pure, transparent and impurity-free potassium chloroaluminate; wherein the AlCl3 in the raw materials needs to be appropriately excessive, so that after the raw materials form a melt, a small amount of free AlCl3 exists in the molten salt, and pure KAlCl4 is formed by adding a small amount of KCl for multiple times in the subsequent process to chemically combine the free AlCl3; in this way, it can be avoided that due to the fact that AlCl3 in molten salt is insufficient, free KCl is formed, the molten salt is large in viscosity and poor in flowability, and free particles block pipelines and valves of equipment; the prepared fused salt is free of free KCl, precipitates and other impurities, low in vapor pressure and good in fluidity, and can be used for fused salt rectification separation of the zirconium-hafnium chloride, the operation efficiency of a rectification tower device is guaranteed, and secondary pollution of the zirconium-hafnium chloride is avoided.

Provided is a method for removing trace moisture from carbon dioxide. The method comprises the following steps: firstly uniformly mixing tetrapropylammonium hydroxide with deionized water to obtain solution A; dissolving potassium metaaluminate in solution A to obtain solution B; dropwise adding tetraethyl orthosilicate to solution B, and stirring and mixing to obtain solution C; transferring solution C to a hydrothermal kettle for a reaction for at least 2 hours, taking out the reactant after the reaction is finished, washing the reactant with water, and centrifugally separating and drying the reactant; continuing heating to 550ºC and performing calcination for at least 2 h to obtain K-ZSM-5; preparing an ethanolic solution of potassium ethoxide, infiltrating the K-ZSM-5 with the ethanolic solution of potassium ethoxide, and removing ethanol from the infiltrated K-ZSM-5 under vacuum to obtain an adsorbent; and filling an adsorption column with the adsorbent, introducing carbon dioxide into the adsorption column, and removing water from the carbon dioxide by means of a chemical adsorption method. The adsorbent preparation method disclosed in the present invention is simple and involves readily available materials; high temperature is not required throughout an impurity removal stage; and the impurity removal method is simple and has high efficiency, and the moisture content can be reduced to 20 ppb or less.

This invention provides a potassium chloroaluminate molten salt and its preparation method. The preparation method includes: uniformly mixing dry AlCl3 and KCl raw materials and adding them to a crucible; heating the mixture in the crucible to melt the raw materials and form an AlCl3-KAlCl4 mixed molten salt; adding KCl to the molten salt in small amounts several times until no volatiles are produced in the crucible, forming a KAlCl4 molten salt; and then hot-filtering the pure KAlCl4 molten salt to obtain a pure, transparent, and impurity-free potassium chloroaluminate salt. The raw materials require an appropriate excess of AlCl3 to ensure the quality of the raw materials. After the melt is formed, there is a small amount of free AlCl3 in the molten salt. The free AlCl3 is combined with KCl by adding small amounts of KCl in multiple batches to form pure KAlCl4. This avoids the formation of free KCl due to insufficient AlCl3 in the molten salt, which would lead to high viscosity, poor fluidity, and free particles clogging the pipes and valves of the equipment. The molten salt prepared by this invention is free of free KCl, precipitates and other impurities, has low vapor pressure and good fluidity, and can be used for the molten salt distillation separation of zirconium hafnium chloride, ensuring the operating efficiency of the distillation tower and avoiding secondary pollution of zirconium hafnium chloride.

The invention relates to low-iron glass for solar thermal power generation and a preparation method of the low-iron glass. Comprising the following steps: uniformly mixing 58.5 to 60 parts by weight of low-iron quartz sand, 12 to 15 parts by weight of low-iron dolomite, 3.5 to 6 parts by weight of low-iron limestone, 18.5 to 20 parts by weight of sodium carbonate, 1.7 to 2.1 parts by weight of potassium metaaluminate, 0.55 to 1.15 parts by weight of kainite, 0.25 to 0.5 part by weight of potassium bismuthate and 0.06 to 0.14 part by weight of cerium oxide to obtain a mixture; the mixture is put into a kiln to be melted, the melting temperature is set in a gradient mode, the oxidizing atmosphere is kept, and molten glass is obtained; clarifying, homogenizing, cooling, forming, annealing and cutting the molten glass to obtain the low-iron glass for solar thermal power generation. The low-iron glass for solar thermal power generation has higher sunlight direct transmittance and lower bubble defect number.

The utility model relates to the technical field of smashing, and discloses a smashing device for potassium fluoroaluminate blocks, which comprises a machine body, a feeding port is arranged on the outer wall of the machine body, a discharging port is arranged on the outer wall of the machine body, a motor is fixedly connected to the outer wall of the machine body, and a reciprocating lead screw can be synchronously driven to rotate when a smashing convex roller rotates. And then the limited sliding block drives a moving plate to move, so that bristles on a toughness plate can move so as to clean the surface of a crushing convex roller on a path, crushed materials are prevented from being attached to the surface of the crushing convex roller, and the bristles can be periodically brushed by an inclined toothed plate during displacement, so that the crushing convex roller is prevented from being crushed. The crushing convex roller is arranged on the flexible plate, so that sundries attached to the bristles can be scraped, the flexible plate is periodically extruded and deformed by the poke rod when the flexible plate moves, and the flexible plate is reset and swings after being completely separated from the poke rod, and therefore the bristles can better scrape and sweep the surface of the crushing convex roller, and crushed materials can be effectively discharged.

The invention discloses a hydrocarbon steam conversion catalyst and a preparation method thereof. The catalyst comprises NiO, ZrO, K2O, Al2O3, CaO and MgO. The carrier disclosed by the invention mainly adopts a magnesium aluminate spinel structure which is prepared by high-pressure crystallization and is uniform in grain size, and the high-temperature stable calcium-potassium aluminate auxiliary agent and zirconium dioxide are added, so that the catalyst carrier has obvious alkalinity and alkaline stability and an obvious anti-carbon deposition effect, and the potassium release rate in the high-temperature synthesized calcium-potassium aluminate auxiliary agent is low; system scaling caused by rapid loss of potassium and alkali can be effectively prevented, so that long-period stable operation of the whole conversion section is facilitated; in addition, by adding the two structural assistants, the active component nickel can be effectively dispersed, so that the catalyst has higher nickel dispersity, nickel grain size growth caused by high-temperature thermal aging in the operation process of the catalyst can be effectively resisted, and the activity stability of the catalyst is improved.

The invention relates to a zinc negative electrode coating and a preparation method and application thereof, and belongs to the technical field of zinc metal batteries. The zinc negative electrode coating provided by the invention comprises the following components in percentage by mass: 85%-90% of an active material and 10%-15% of a binder, and the active material comprises at least one of sodium hexafluoroaluminate and potassium hexafluoroaluminate. Researches find that at least one of sodium hexafluoroaluminate or potassium hexafluoroaluminate is used as an active material of the zinc negative electrode coating; the zinc cathode has the effects of remarkably improving contact at a zinc cathode-electrolyte interface, promoting desolvation of zinc ions on the surface of the zinc cathode, reducing zinc nucleation overpotential, promoting zinc nucleation on the surface of the zinc cathode, promoting uniform deposition of zinc on the surface of the zinc cathode, inhibiting growth of zinc dendrites and the like; and the cycle performance of the battery can be remarkably improved.

The invention provides a welding flux for nickel-based alloy submerged arc horizontal position welding and a preparation method of the welding flux, and relates to the technical field of welding materials. According to the total mass of the flux, the flux comprises, by mass, 19%-28% of fluorite, 9%-13% of wollastonite, 25%-35% of magnesia, 21%-30% of bauxite, 1%-5% of silica powder, 1%-4% of nickel-magnesium alloy, 1%-5% of potassium fluoroaluminate and 3%-11% of dolomite. The combined welding wire and welding flux is matched with an ERNiCrMo-4 nickel-based welding wire to carry out submerged arc horizontal position welding on a nickel-based alloy plate, the electric arc stability is good, deslagging is good, forming is attractive, deslagging is easy, deposited metal components are stable, and the mechanical property is excellent.

A concrete floor hardening agent includes an aluminate, a waterproofing agent, and water. The aluminate is selected from the group consisting of potassium aluminate and sodium aluminate, and is present in an amount ranging from 15 wt % to 65 wt % based on 100 wt % of the concrete floor hardening agent. The waterproofing agent is selected from the group consisting of potassium methyl silicate, sodium methyl silicate, silicone oil, and siloxane, and is present in an amount ranging from 5 wt % to 20 wt % based on 100 wt % of the concrete floor hardening agent.

The application discloses a method and device for producing bauxite coupled potassium-silicon fertilizer by potassium-calcium coupling treatment, and particularly relates to the field of clean production of alumina, which comprises the following steps: mixing calcium compounds, biomass, bauxite and potassium meta-aluminate circulating mother liquor in a vortex type ore slurry tank to obtain ore slurry; dissolving the ore slurry in a high-pressure dissolution reactor; under the potassium-calcium and biomass coupling effect, the aluminum potassium occurrence phase in the balanced solid phase is converted into calcium-potassium composite silicate, and the iron occurrence phase is converted into magnetic iron phase; the reaction temperature is controlled to be 140 DEG C-290 DEG C, and the reaction time is controlled to be 30-90 minutes; the dissolved ore slurry is preheated by a preheater to cool the cold ore slurry, and then is subjected to solid-liquid separation in a vortex type rapid settling tank to obtain a dissolution liquid and magnetic red mud; the dissolution liquid is decomposed to obtain aluminum hydroxide, and the aluminum hydroxide is calcined to obtain alumina; and (5) the magnetic red mud is subjected to magnetic separation to remove iron to obtain iron powder, and the residue is rich in 3-10% potassium oxide and can be used as magnetic potassium-silicon long-acting fertilizer.

The invention discloses a Cu-SSZ-13 molecular sieve catalyst, an organic-template-free one-pot synthesis method thereof and application of the Cu-SSZ-13 molecular sieve catalyst in NH3-SCR denitration. The synthesis method comprises the following steps: preparing a potassium tetrahydroxy aluminate aqueous solution, adding the potassium tetrahydroxy aluminate aqueous solution into silica sol, uniformly mixing, then adding metal inorganic copper salt, and continuously stirring for 5-15 minutes to obtain a mixture; putting the mixture into a homogeneous reactor, and aging at room temperature for 20-28 hours at the rotating speed of 15-25 rpm; after aging is finished, the temperature is raised to 150-170 DEG C, and hydrothermal crystallization is carried out for 90-110 h; and then cleaning and drying to obtain the Cu-SSZ-13 molecular sieve catalyst. By adopting the technical scheme of the invention, the Cu-SSZ-13 molecular sieve catalyst can be synthesized in one step by a hydrothermal method under the condition that an organic template agent is not used, and the synthesized catalyst has efficient NH3-SCR denitration performance; and the method is low in cost, small in pollution and simple in process.

A construction product in the form of an internal lining board is formed from a mixture comprising: a binder, a bio-aggregate, an accelerator and a retarder. The ratio by weight of the accelerator to the binder is 1:10000 to 5:100. Planar lining material, such as paper, is provided on one or both outer faces of the mixture. The binder may comprise an alkaline earth-based binding agent, such as hydrated lime, and a cementitious material, wherein the cementitious material may comprise blast furnace slag, alkali activated binders, white cement, natural cement, calcium aluminate cement, and / or Portland cement. The accelerator can comprise calcium chloride, calcium nitrate, calcium nitrite, calcium formate, potassium aluminate, sodium silicate, sodium carbonate, sodium bicarbonate, sodium aluminate, diethanolamine, and / or aluminium sulfate. The retarder can comprise a sugar, phosphoric acid, a phosphate, boric acid, a borate, a lignosulfonate and / or citric acid. The mixture may further comprise cellulose. The bio-aggregate may be pyrolysed and can comprise a crop by-product. A method of manufacturing a construction product is also described.

The application discloses a method for removing trace water from carbon dioxide, which comprises the following steps: firstly, mixing tetrapropylammonium hydroxide and deionized water uniformly to obtain solution A; dissolving potassium aluminate in the solution A to obtain solution B; adding tetraethyl orthosilicate into the solution B drop by drop, stirring and mixing; transferring the solution C into a hydrothermal kettle to react for at least 2 hours; after the reaction is completed, taking out the reaction product, washing with water, centrifugal separation and drying; continuously heating to 550 DEG C, calcining for at least 2 hours to obtain K-ZSM-5; preparing an ethanol solution of potassium ethoxide, immersing the K-ZSM-5 in the ethanol solution of potassium ethoxide, removing ethanol from the immersed K-ZSM-5 under vacuum, and obtaining an adsorbent; filling the adsorbent into an adsorption column, passing carbon dioxide into the adsorption column, and removing water in the carbon dioxide by using a chemical adsorption method. The preparation method of the adsorbent is simple, the material is easy to obtain, the whole impurity removal stage does not need high temperature, the impurity removal method is simple, the efficiency is relatively high, and the water content can be reduced to below 20 ppb.

This application belongs to the technical field of elemental additives for cast aluminum alloys, specifically a potassium fluoroaluminate type iron agent, its preparation method, and an aluminum alloy. The potassium fluoroaluminate type iron agent disclosed in this application is characterized by comprising: stearic acid; reduced iron powder, wherein the mass fraction of iron in the reduced iron powder is ≥98.5%; potassium fluoroaluminate, wherein the potassium fluoroaluminate and reduced iron powder are pressed and bonded together by stearic acid to form the potassium fluoroaluminate type iron agent; wherein the density of the potassium fluoroaluminate type iron agent is ≥3.7 g / cm³, and the mass fraction of iron in the potassium fluoroaluminate type iron agent is 73%-77%.

This invention belongs to the field of heterogeneous hydrogenation catalyst technology, specifically relating to a catalyst for the synthesis of 1,2,3,4-tetrahydronaphthol, its preparation, and its application. The catalyst comprises the following components by weight percentage: 75-90% activated carbon, 5-15% aluminate, and 5-15% active metal; the aluminate is sodium aluminate or potassium aluminate; the active metal is nickel. The catalyst of this invention possesses abundant alkali metal cations (basic centers), which can effectively modulate the adsorption configuration of reactant molecules on the catalyst surface, while simultaneously improving the tautomerism of the reactants. Furthermore, the active metal nickel exhibits high dispersibility. Therefore, it demonstrates high reactivity, selectivity, and stability in the hydrogenation preparation of 1,2,3,4-tetrahydronaphthol.

The invention discloses a composite high-conductivity aluminum alloy refining agent and a preparation process thereof, the refining agent comprises the following components: 30-40% of cryolite, 10-15% of potassium fluoroaluminate, 8-12% of rare earth fluoride, 10-15% of sodium carbonate, 10-15% of magnesium fluoride, 8-12% of graphite powder and 8-12% of talcum powder. In the preparation steps, a scheme of ball-milling pre-activation, graded granulation prefabrication and three-dimensional particle mixing is adopted, an organic coupling agent solution is sprayed on the surfaces of particles after ball-milling pre-activation, and nitrogen is adopted for protection in the grinding and mixed granulation process. According to the refining agent, a cryolite and potassium fluoroaluminate eutectic system is adopted, the melting point of the system can be effectively reduced to 720-740 DEG C, the permeation and adsorption capacity to an Al2O3 film is remarkably enhanced, rare earth fluoride can effectively inhibit generation of harmful intermetallic compounds, and the gaseous refining agent is sodium nitrate and sodium carbonate, so that emission of harmful gas is remarkably reduced. The method has high efficiency, environmental protection property and economical efficiency, and an ideal technical solution is provided for the field of aluminum alloy smelting.

The invention relates to the technical field of new energy and mining and blasting, in particular to a biomass instantaneous cracking agent and a construction method thereof. The biomass instantaneous cracking agent provided by the invention is granular and comprises the following components in parts by mass: 4-55 parts of biomass powder, 0-48 parts of pulverized coal, 0-45 parts of an oxidizing agent, 0-20 parts of a catalyst, 0-2.5 parts of a release agent, 2-10 parts of an adhesive and 0-0.15 part of a preservative, and the oxidizing agent and the catalyst are not 0 at the same time; the oxidizing agent is potassium peraluminate powder and / or ammonium perchlorate powder; the catalyst is potassium nitrate powder and / or sodium nitrate powder. The biomass instantaneous cracking agent provided by the invention solves the problems of long stone cracking time, low efficiency and environmental pollution of the existing stone cracking agent product.