8 results about "Potassium aluminate" patented technology

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 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 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 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.