15 results about "Aluminum hydrate" patented technology

The invention relates to a recycling method of chemical polishing waste liquid, which comprises the following steps: (1) carrying out first pH regulation treatment on the chemical polishing waste liquid containing phosphate radicals, sulfate radicals, aluminum ions and + 3 valent iron ions to obtain aluminum mud and aluminum-removed liquid; (2) sequentially carrying out second pH regulation treatment, third pH regulation treatment and dealumination treatment on the aluminum mud to obtain a hydrated calcium aluminate product; (3) the aluminum-removed liquid is subjected to phosphorus removal treatment, and first phosphorus mud and phosphorus-removed liquid are obtained; sequentially carrying out fourth pH regulation treatment and first evaporative crystallization treatment on the first phosphorus sludge to obtain a sodium phosphate product; and sequentially carrying out fifth pH regulation treatment and second evaporative crystallization treatment on the dephosphorized liquid to obtain a sodium sulfate product. According to the method disclosed by the invention, phosphorus, sulfur and aluminum in the chemical polishing waste liquid are completely separated by utilizing different solubility of different substances in the solution when the pH value is the same, and a sodium phosphate product, a sodium sulfate product and a hydrated calcium aluminate product are respectively obtained, so that complete recycling of elements in the chemical polishing waste liquid is realized, and no byproduct waste is produced.

The invention discloses a silicon removal agent and application thereof in alkaline vanadium-containing leachate, and the silicon removal agent is obtained through the following steps: taking aluminum-containing silicon removal slag as a raw material, putting the aluminum-containing silicon removal slag into a NaOH solution, continuously stirring, filtering, collecting solids, drying and grinding to obtain the silicon removal agent, wherein the pH (Potential of Hydrogen) value of the NaOH solution is 8.0 to 10.0; the NaOH solution also contains cationic polyacrylamide, and the concentration of the cationic polyacrylamide is 0.1 to 0.3 mg / ml; the stirring temperature is 80 to 95 DEG C, and the temperature is kept for 60 to 120 minutes. Alkaline vanadium-containing leachate obtained through a sodium salt roasting-water leaching process of vanadium-containing raw materials (vanadium slag and the like) is used as a raw material, aluminum salt (aluminum sulfate, sodium metaaluminate and the like) is used as an impurity removal agent, precipitate sodium aluminosilicate hydrate is added, a sodium aluminosilicate porous material is obtained after treatment, and the sodium aluminosilicate porous material can be used as a silicon removal agent and precipitate floc. And removing silicon impurities in the solution under a weakly alkaline condition.

Processes for producing a precipitated aluminum trihydrate (ATH) product from scrap or waste aluminum metal include the steps of contacting the aluminum metal with an activating composition containing gallium and / or indium to form an activated aluminum composition, reacting the activated aluminum composition with water and an ionic salt, a hydroxide, and / or an acid to form hydrogen gas and a first reaction mixture comprising solid ATH and a first solid fraction, isolating the solid ATH and the first solid fraction from the first reaction mixture, contacting the solid ATH and the first solid fraction with an aqueous caustic solution to form a second reaction mixture containing dissolved sodium aluminate, removing a second solid fraction from the second reaction mixture to form a liquor solution, seeding the liquor solution with a seed material to precipitate ATH and form a suspension, isolating precipitated ATH from the suspension and washing the precipitated ATH to form an intermediate ATH product, optionally milling the intermediate ATH product, and drying the intermediate ATH product to form the precipitated ATH product. Concurrently with the production of ATH is the production of molecular hydrogen and significant amounts of heat / energy.

The present invention provides a surface-treated aluminum material that exhibits excellent corrosion resistance to corrosive gases and plasma, and can suppress the occurrence of cracks even when the temperature rises, as well as a method for manufacturing the same and a component for a plasma processing apparatus. [Solution] The surface-treated aluminum material 1 comprises a base material 2 made of aluminum or an aluminum alloy, and a protective film 3 formed on the base material. The protective film 3 consists of an aluminum oxide and comprises a first layer 31 covering the base material 2, and a second layer 32 containing aluminum hydrate oxide and covering the first layer 31. When the aluminum material 1 is subjected to a high-temperature cycle test under specific conditions, the number of cracks formed in the protective film 3 per unit area is A. HC It is within a specific range.

Processes for preparing high-purity aluminum oxide include providing an aluminum feedstock, reacting the aluminum feedstock with one or more acids to form a hydrated aluminum salt solution, and calcining the hydrated aluminum salt to form an aluminum oxide powder. Other processes for preparing high-purity aluminum oxide include providing an aluminum feedstock and reacting it with one or more acids to form a first hydrated aluminum salt solution, precipitating hydrated aluminum salt from the first hydrated aluminum salt solution to produce a mixture of precipitated hydrated aluminum salt crystals and a mother liquor, separating precipitated hydrated aluminum salt crystals from the mother liquor, dissolving the hydrated aluminum salt crystals in a solvent to form a second hydrated aluminum salt solution, and calcining hydrated aluminum salt of the second hydrated aluminum salt solution to form an aluminum oxide powder. Also described herein are various furnaces for preparing high-purity aluminum oxide.

The present invention relates to a thermoplastic coating for medium-voltage cables, specifically designed to improve both their sliding properties and fire resistance. This innovative coating solution addresses the technical problem of fire spread in the event of ignition near or on the cable, while minimizing the time and effort required for cable installation. The invention utilizes a unique formulation of PVC compounds, incorporating non-halogenated alkyl aryl flame-retardant plasticizers, along with a combination of flame retardants such as magnesium hydroxide (MDH), aluminum trihydrate (ATH), and sepiolite-based flame retardants. Additionally, high-energy light stabilizers (HALS) are included to protect the cable from degradation over time. The overall result is a coating that provides effective fire resistance, reduces friction, and significantly simplifies installation. The system works by preventing the spread of fire and ensuring that cables can be easily inserted into electrical conduits, even in challenging environments.

Processes for producing a precipitated aluminum trihydrate (ATH) product from scrap or waste aluminum metal include the steps of contacting the aluminum metal with an aqueous caustic solution to form hydrogen (H2) gas and a reaction mixture containing dissolved sodium aluminate, removing a solid fraction from the reaction mixture to form a liquor solution, seeding the liquor solution with a seed material to precipitate ATH and form a suspension, isolating solid ATH from the suspension and washing the solid ATH to form an intermediate ATH product, optionally milling the intermediate ATH product, and drying the intermediate ATH product to form the precipitated ATH product. Concurrently with the production of ATH is the production of molecular hydrogen and significant amounts of heat / energy.

The invention discloses application of a lauryl amine intercalation alpha-phase zirconium phosphate nanosheet, and belongs to the technical field of functional material preparation. Alpha-phase zirconium phosphate nanosheets are synthesized by using zirconium aluminum oxide octahydrate, phosphoric acid and hydrogen fluoride as raw materials through a direct precipitation method, and the alpha-phase zirconium phosphate nanosheets are intercalated by using lauryl amine; and dispensing the dispersion liquid of the product on an interdigital electrode to obtain the corresponding humidity sensor. Compared with a pure alpha-phase zirconium phosphate nanosheet, the alpha-phase zirconium phosphate nanosheet has the advantages that the property response value is increased from-38% to-79.9%, and the response is increased by about 2.1 times. The humidity sensor based on the dodecylamine intercalation alpha-phase zirconium phosphate nanosheet is excellent in response linearity, and the determination coefficient reaches 0.988.

The present invention relates to a thermoplastic coating for medium-voltage cables, specifically designed to improve both their sliding properties and fire resistance. This innovative coating solution addresses the technical problem of fire spread in the event of ignition near or on the cable, while minimizing the time and effort required for cable installation. The invention utilizes a unique formulation of PVC compounds, incorporating non-halogenated alkyl aryl flame-retardant plasticizers, along with a combination of flame retardants such as magnesium hydroxide (MDH), aluminum trihydrate (ATH), and sepiolite-based flame retardants. Additionally, high-energy light stabilizers (HALS) are included to protect the cable from degradation over time. The overall result is a coating that provides effective fire resistance, reduces friction, and significantly simplifies installation. The system works by preventing the spread of fire and ensuring that cables can be easily inserted into electrical conduits, even in challenging environments.

An anti-reflective glass comprises, in sequence, a glass substrate, an anti-reflective film, and a protective layer. The anti-reflective film, starting from the glass substrate side, is constructed in the following order: a low-to-medium refractive index layer with a refractive index of 1.36–1.45 and a thickness of 150–210 nm; a medium refractive index layer with a refractive index of 1.56–1.79 and a thickness of 90–140 nm; a high refractive index layer with a refractive index of 1.75–1.87 and a thickness of 30–50 nm; and a low refractive index layer with a refractive index of 1.27–1.35 and a thickness of 70–75 nm. The high refractive index layer has a higher refractive index than the medium refractive index layer. The refractive index of the aforementioned protective layer is 1.43 to 1.48, and the layer thickness is 20 to 30 nm. The aforementioned high refractive index layer, low refractive index layer, and protective layer contain (A) aluminum hydrate. The average light reflectance of both sides at wavelengths of 380 to 780 nm is less than 0.6%, and the average light transmittance at wavelengths of 380 to 780 nm is more than 98%. This anti-reflective glass has high anti-reflective performance, excellent alkali resistance, and is suitable for the manufacture of anti-reflective tempered glass.

The application provides a eutectic aqueous aluminum ion battery electrolyte and a preparation method and application thereof, and relates to the technical field of aluminum ion batteries.The eutectic aqueous aluminum ion battery electrolyte is prepared by solid-solid mixing of aluminum metal salt and eutectic substance; the aluminum metal salt is selected from at least one of aluminum chloride hexahydrate, aluminum perchlorate nonahydrate, aluminum nitrate nonahydrate and aluminum sulfate octadecahydrate; and the eutectic substance is an organic small-molecule compound containing amino and ester groups. By screening and proportion control of the hydrated aluminum metal salt and the eutectic substance, the prepared electrolyte is applied to an aqueous aluminum ion battery, such as a symmetrical battery and a full battery, and excellent performance is exhibited. The electrolyte can improve the stability of the aluminum ion battery, form an anion-dominated solvation structure, and at the same time, form a dense anion-rich solid electrolyte interface layer on the surface of the aluminum negative electrode to protect the aluminum metal negative electrode. The problem of poor negative electrode stability of the existing aqueous aluminum ion battery is solved.

The invention discloses a low-carbon magnesium-zirconium-carbon upper nozzle brick and a preparation method thereof, and belongs to the technical field of refractory materials. The upper nozzle brick comprises the following components in percentage by weight: 70%-75% of granular aggregate and 25%-30% of co-grinding powder, and the total percentage is 100%. The granular aggregate comprises the following components in percentage by weight: 25-30% of magnesia particles and 70-75% of fused magnesium-zirconium sand; adding 3-4% of phenolic resin; wherein the co-grinding powder is prepared by uniformly mixing 6%-10% of magnesia powder, 5%-8% of fused magnesium-zirconium sand powder, 3%-5% of metal aluminum powder, 5%-8% of 898 graphite and 1%-3% of silicon carbide powder; the surfaces of the fused magnesium-zirconium sand particles are coated with a coating layer, and the coating layer is provided with a coating layer containing hydrated calcium aluminate and alumina gel. The upper nozzle brick prepared by the method can solve the contradictions that the traditional magnesia-carbon material is poor in thermal shock resistance and the alumina-carbon material is not resistant to high alkalinity erosion, and the comprehensive performance and the service life of the product are remarkably improved while the carbon content is reduced.

The present application relates to the field of catalyst, especially to a MOFs catalyst and its preparation method and application.The method comprises: taking an aluminum-based MOF as a carrier, loading noble metal through an impregnation reduction method, and then performing gas phase reduction; wherein the aluminum-based MOF is synthesized by a hydrothermal method with a precursor and an organic ligand as raw materials, the metal precursor is an aluminum salt or a hydrated aluminum salt, and the organic ligand is selected from one or more of square acid, terephthalic acid, 2-fluoroterephthalic acid, diphenic acid, bipyridine, bipyridine dicarboxylic acid, trimesic acid, pyromellitic acid, and mellitic acid; the noble metal includes a Pd salt.The present application can prepare stable aluminum-based MOFs, obtain a strong interaction catalyst of noble metal and aluminum-based MOFs, the MOFs catalyst has stable properties, excellent performance, good morphology, high activity, and good selectivity for double bonds, and the MOFs catalyst can be recovered by centrifugation and reused multiple times.

The present invention concerns a method of preparing aluminum monohydrate comprising the steps of i) mixing alumina feedstock with ethylenediamine tetraacetic acid, to obtain a feedstock mixture, and ii) subjecting the feedstock mixture to a hydrothermal treatment, wherein the wherein the pH of the feedstock mixture is at least 8. The resulting aluminum monohydrate, although starting from low purity feedstocks, shows an excellent purity and can be calcined to obtain high purity alpha alumina.

A method for producing alumina from bauxite pre-processed by a process including calcination (2020) and leaching (2030), wherein the pre-processed bauxite is characterized by a loss on ignition of less than 2.5% by mass, the method comprising the steps of: (a) processing the pre-processed bauxite with an aqueous sodium hydroxide solution at a temperature of at least 100°C (2120), wherein the concentration of the aqueous sodium hydroxide solution is between 100 g Na2O / L and 220 g Na2O / L, preferably between 140 g Na2O / L and 200 g Na2O / L, more preferably between 155 g Na2O / L and 190 g Na2O / L, and even more preferably between 160 g Na2O / L and 180 g Na2O / L. (a) Na2O / L; (b) Separating the solid residue from the liquid phase (2130); (c) Crystallizing aluminum trihydrate by adding seed crystals (2170) (2160); (d) Separating the crystallized aluminum trihydrate from the liquid phase (2180); (e) Calcincing the aluminum trihydrate obtained in step (d) (2194) to obtain alumina (2196).