| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423624000 | Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be) | 49 |
| 20150010465 | METHOD FOR PREPARING AMORPHOUS IRON OXIDE HYDROXIDE - A method for preparing amorphous iron oxide hydroxide, comprising following steps: (1) preparing a ferrous salt solution with solid soluble ferrous salt; (2) preparing a hydroxide solution; (3) mixing said hydroxide solution and said ferrous salt solution in a co-current manner for reaction at an alkali ratio of 0.6˜0.8 and a reaction temperature not exceeding 30° C.; (4) after the reaction in step (3) is finished, yielding a first mixture, then charging said first mixture with a gas containing oxygen for oxidation, and controlling the first mixture at a pH value of 6˜8 until the oxidation is finished to yield a second mixture; and (5) filtering, washing with water and drying said second mixture obtained in step (4) to yield the amorphous iron oxide hydroxide. | 01-08-2015 |
| 20160075565 | INDIUM OXIDE NANOROD AND MANUFACTURING METHOD THEREOF - Provided is a manufacturing method of indium oxide nanorods, including the following steps: providing a temperature furnace divided into a first zone and a second zone; putting an indium metal source in the first zone and putting a substrate in the second zone; modulating a temperature of the first zone to a first temperature and modulating a temperature of the second zone to a second temperature, wherein the first temperature is higher than the second temperature; and inputting argon and oxygen into the temperature furnace when the temperature of the first zone reaches the first temperature and the temperature of the second zone reaches the second temperature, wherein a ratio of argon and oxygen is in a range of 30:1 to 70:1 such that a plurality of indium oxide nanorods are formed on the substrate. An indium oxide nanorod is also provided. | 03-17-2016 |
| 20160115621 | METHOD FOR CULTIVATING BETA-Ga2O3 SINGLE CRYSTAL, AND BETA-Ga2O3-SINGLE-CRYSTAL SUBSTRATE AND METHOD FOR PRODUCING SAME - Provided is one embodiment which is a method for growing a β-Ga | 04-28-2016 |
| 423625000 | Aluminum | 46 |
| 20080226543 | Stripping Method - The invention describes a method for stripping alumina which is particularly suitable for removal of fluoride from alumina and comprises washing said alumina with an aqueous acid or alkali at elevated temperature. The method may be used for removal of unreacted radiofluoride such as [ | 09-18-2008 |
| 20080311032 | Method of manufacturing aluminum oxide (Al2O3) substrate - A method of manufacturing aluminum oxide (Al | 12-18-2008 |
| 20090016954 | AGGLOMERATION OF ALUMINA AND BINDER THEREFOR - A method for the agglomeration of alumina particles, the method comprising the steps of comminuting a plurality of alumina particles having a soda content of less than approximately 0.4% by weight to a D | 01-15-2009 |
| 20090123362 | Process for producing nanocrystalline alpha-AI2O3 - A process is claimed for producing nanocrystalline α-Al | 05-14-2009 |
| 20090123363 | METHOD FOR PRODUCING AN ALPHA-ALUMINA POWDER - The present invention provides a method for producing an α-alumina powder. The method for producing an α-alumina powder comprises steps of:
| 05-14-2009 |
| 20090232726 | Method for manufacturing alumina particles - A method for manufacturing alumina particles having a size on the order of nanometers and an excellent heat resistance at about 1000° C. comprises providing a liquid medium containing particles made of γ-alumina or boehmite alumina hydrate and a metal component such as La, Ba, Mg or the like, and thermally treated the alumina and the metal component in the liquid medium in a pressurized condition. The thermally treated particles are dried and sintered at a temperature of from 900° C. to lower than 1200° C. to provide alumina particles which has a metal aluminate crystal phase thereon. The metal component is formed as a solid solution as a surface layer of individual alumina particles by subjecting the alumina particles and the metal component to the thermal treatment prior to sintering, so that the metal aluminate crystal phase can be formed by sintering at temperatures lower than ordinary sintering temperatures. | 09-17-2009 |
| 20100021374 | PROCESS FOR PRODUCING HIGH-PURITY a-ALUMINA - Provided is a process for producing a high-purity α-alumina in which an Si content, an Fe content, a Ca content, and an Na content are simultaneously removed. The high-purity α-alumina is produced by burning aluminum hydroxide having an Na content of 0.11 mass % or less, an Fe content of 6 ppm or less, a Ca content of 1.5 ppm or less, and an Si content of 10 ppm or less as impurities in terms of alumina respectively, and having an average particle diameter of 55 μm or less at a burning temperature of 1,100 to 1,500° C. by using a burning vessel containing Al | 01-28-2010 |
| 20100040535 | ALPHA-ALUMINA POWDER - α-Alumina powder having a purity of at least 99.99% by weight, a specific surface area of from 0.1 to 2.0 m | 02-18-2010 |
| 20100040536 | Method for producing boehmite particles and method for producing alumina particles - A method for producing boehmite particles includes subjecting powder of aluminum hydroxide to hydrothermal reaction together with a nucleation agent, thereby obtaining boehmite particles having an average primary particle size of 0.6 μm or less and including primary particles each having a hexahedral shape. A method for producing alumina particles includes: drying the boehmite particles produced by the above described method; calcining the boehmite particles, which have been dried, to obtain alumina particles; and disintegrating the obtained alumina particles. | 02-18-2010 |
| 20100047157 | PROCESS FOR PREPARATION OF ALUMINA PRECURSOR POWDER AND PROCESS FOR PREPARATION OF ALUMINA POWDER - There is provided a process for the preparation of a alumina precursor powder from aluminum hydroxide powder obtained by hydrolysis of aluminum alkoxide which precursor enables to provide alumina powder with a high volumetric efficiency. | 02-25-2010 |
| 20100166642 | METHOD FOR PRODUCING ALUMINA - A method for producing alumina comprising the steps of mixing an aqueous medium in an amount of 20 parts by weight or more and 300 parts by weight or less with 100 parts by weight of a first dry powdery aluminum hydroxide prepared by an aluminum alkoxide method to give a wet powdery aluminum hydroxide; drying the wet powdery aluminum hydroxide by an agitation drying system to give a second dry powdery aluminum hydroxide; and calcining the second dry powdery aluminum hydroxide to give alumina having a high bulk density. | 07-01-2010 |
| 20110052485 | METHOD OF MANUFACTURING FLAKE ALUMINUM OXIDE USING MICROWAVE - The present disclosure suggests a method of manufacturing flake aluminum oxide using a microwave including: performing a pre-treatment on a starting material by grinding the starting material such as alumina hydrate, aluminum salt or the like and classifying particles with an appropriate size; manufacturing transition alumina by performing a heat treatment by means of heating the pre-treated starting material; mixing the transition alumina with molten salt and an additive and then dispersing and grinding the mixed compounds; melting and synthesizing flake aluminum oxide by heating the dispersed and grinded mixture with a microwave as a heating source; separating the molten salt and the additive from the synthesized aluminum oxide; and performing a post-treatment on the flake aluminum oxide by removing a foreign substance such as an additive residue stuck to a surface of a crystal particle of the separated flake aluminum oxide. | 03-03-2011 |
| 20110123431 | THERMALLY SPRAYED AL2O3 LAYERS HAVING A HIGH CONTENT OF CORUNDUM WITHOUT ANY PROPERTY-REDUCING ADDITIVES, AND METHOD FOR THE PRODUCTION THEREOF - The invention relates to thermally sprayed Al | 05-26-2011 |
| 20110150754 | WATER-IN-OIL-IN-WATER EMULSIONS OF HYDROXAMATED POLYMERS AND METHODS FOR USING THE SAME - A method and composition for flocculation and separation of suspended solids from an industrial process stream containing suspended solids is provided. The method includes the steps of adding to the stream a water-in-oil-in-water emulsion polymer in an amount effective to flocculate the suspended solids and separating the flocculated solids therefrom. The composition is a water-in-oil-in-water emulsion of a water-soluble polymer in which the continuous phase is an aqueous solution of a water-soluble salt. | 06-23-2011 |
| 20120009118 | System for Optimizing and Controlling Particle Size Distribution And For Scale-Up Of Nanoparticle Production In An Aerosol Flame Reactor - The present invention relates to a system for optimizing and controlling the particle size distribution and scale-up of production of nanoparticle in an aerosol flame reactor. The method provides nanoparticles with desired, optimized and controlled particle size and the specific surface area in aerosol reactors using a simulation tool with programmed instructions. The said simulation tool couples flame dynamics model and particle population balance model. | 01-12-2012 |
| 20120014863 | PROCESS AND PLANT FOR PRODUCING METAL OXIDE FROM METAL SALTS - A process for producing metal oxide from metal salts includes cleaning a metal salt in a filter. After cleaning, the metal salt is dried in a drying apparatus. Steam is formed in the drying apparatus. The metal salt is preheated in at least one preheating stage. The metal salt is calcined to metal oxide in a fluidized-bed reactor. The metal oxide is cooled. The steam formed in the drying apparatus is recirculated into the filter. | 01-19-2012 |
| 20150104375 | STARTING MATERIAL ALUMINA FOR PRODUCTION OF SAPPHIRE SINGLE CRYSTAL AND METHOD FOR PRODUCING SAPPHIRE SINGLE CRYSTAL - Disclosed is an alumina raw material for the production of a sapphire single crystal, which contains at least one element X selected from the group consisting of elements (1) to (3) shown below, wherein the concentration of the element X is 10 ppm or more and 1,000 ppm or less expressed in terms of atoms, and each concentration of silicon (Si), gallium (Ga), germanium (Ge) and tin (Sn) is 10 ppm or less expressed in terms of atoms. | 04-16-2015 |
| 20150104376 | METHOD OF ANNEALING SAPPHIRE - A method of annealing at least one sapphire lamina is disclosed. The method comprises at least two different heating steps and produces an annealed sapphire lamina having improved optical properties that can be used for fabricating a cover plate of an electronic device. The cover plate and electronic device comprising the annealed sapphire lamina are also disclosed. | 04-16-2015 |
| 20160060173 | HIGH STRENGTH TRANSPARENT CERAMIC USING CORUNDUM POWDER AND METHODS OF MANUFACTURE - High strength transparent corundum ceramics using corundum powder and methods of manufacture are disclosed. The method of forming transparent corundum ceramics includes milling corundum powder in aqueous slurry with beads. The method further includes processing the slurry by a liquid shaping process to form a gelled body. The method further includes sintering the gelled body in air and pressing the gelled body by hot isostatic pressing to form a ceramic body. | 03-03-2016 |
| 20160076135 | Sapphire thin film coated substrate - A method to deposit a layer of harder thin film substrate onto a softer substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer substrate e.g. quartz, fused silica, silicon and (toughen) glass. This combination is better than pure sapphire substrate. | 03-17-2016 |
| 20220135418 | PRODUCTION OF HIGH PURITY ALUMINA AND CO-PRODUCTS FROM SPENT ELECTROLYTE OF METAL-AIR BATTERIES - Methods and systems are provided, which convert spent electrolyte from aluminum-air batteries into high purity alumina (HPA) and useful co-products such as fertilizer(s) and/or feed supplement(s). Aluminum tri-hydroxide (ATH) having potassium (K) and/or sodium (Na) impurities, e.g., from spent electrolyte, may be dissolved in strong acid to form an acidic ATH solution having pH<4. Consecutively, the acidic ATH solution may be neutralized to pH>4 to precipitate ATH while retaining dissolved K/Na in the neutralized solution. The dissolving and the neutralizing may then be repeated with the precipitated ATH until a specified purity level of the precipitated ATH is reached. Using appropriate bases to neutralize the acidic ATH solution, e.g., ammonia and/or choline, yields useful co-products such as ammonium nitrate (with nitric acid as the strong acid) and choline chloride (with hydrochloric acid as the strong acid), respectively. | 05-05-2022 |
| 423626000 | Utilizing acid | 9 |
| 20080279761 | Process for Producing Low-Soda Alumina, Apparatus Therefor, and Alumina - A process for producing a low-soda alumina comprising calcining aluminum hydroxide in a calciner in the presence of a soda-removal agent, wherein the alumina dust produced in the calciner is sorted by particle size and collected in a dust collector and at least a portion of the collected alumina dust is subjected to a soda-removal process and is then returned to the calciner. An apparatus for producing a low-soda alumina, comprising a calciner for calcining aluminum hydroxide in the presence of a soda-removal agent, by which alumina dust is produced; a unit connected to the calciner for collecting, by particle size, the alumina dust; a unit for removing soda from a slurry containing at least a portion of the collected alumina dust; and a circuit for returning the soda-removed alumina dust back into the calciner. | 11-13-2008 |
| 20090081117 | Process For Preparing Aluminium Species - A static ion-exchange process for the preparation of a polynuclear Al species comprising the treatment of an aqueous aluminium chloride solution with a hydroxide-form ion-exchange resin at a temperature of from 5° C. to 60° C. for a period of at least 30 minutes. | 03-26-2009 |
| 20090104108 | Method of Preparing Boehmite and Gamma-Alumina With High Surface Area - The present invention relates to a method for preparing boehmite and γ-alumina with high surface area, and more particularly, to a method comprising hydrolysis of aluminum alkoxides to produce boehmite and calcination to produce γ-alumina, wherein an alcohol is used as a reaction solvent and a small amount of water and a particular organic carboxylic acid are added so that not only the reaction solvent is easily recovered and energy required for drying is significantly reduced but also it provides boehmite having nano-sized particles, high surface area, and high purity. Further, the prepared γ-alumina may be suitable for high value added industrial applications such as manufacture of adsorbents, catalysts, catalyst supports and chromatography materials. | 04-23-2009 |
| 20090232727 | Particulate Alumina Composition and Process for Production Thereof - A method for producing a particulate alumina composition includes the steps of preparing a wet particulate in a gas-liquid-solid three-phase system containing air by adding water and/or one or more compounds selected from an inorganic compound and an oxygen-containing organic compound to one or more alumina sources selected from an alumina hydrate and an alumina being rehydratable in the temperature range of 70 to 250° C., and to carry out a hydrothermal reaction in a temperature range of 70° C. to 250° C. Filtration and washing are carried out after the particulate alumina composition is preliminarily brought into contact with an alkaline component when an acid component is removed from the particulate alumina composition. The particulate alumina composition obtained by the method has a specific surface area in a dried product at 200° C. in the range of 40 to 300 m | 09-17-2009 |
| 20100150820 | Process for Producing Enhanced Alumina - The present invention provides an essentially dry method for preparation of enhanced alumina powders. The first step involves rapid calcination of an aluminum compound to produce alumina powder. The alumina powder is mixed with solid ammonium carbonate and a small amount of water. This mixture heats itself although some external heat is helpful to produce ammonium aluminum hydroxycarbonate (dawsonite-type) NH | 06-17-2010 |
| 20110142749 | ALUMINUM HYDROXIDE GEL PARTICLE AND PRODUCTION METHOD THEREOF - An aluminum hydroxide gel particle having high purity and extremely high acid reactivity and a production method thereof. | 06-16-2011 |
| 20120288438 | SYNERGISTIC EFFECT OF SURFACTANT COMBINATIONS AS DEWATERING AIDS FOR ALUMINA TRIHYDRATE - The invention is directed towards methods and compositions for treating slurry to better dewater alumina trihydrate precipitated from the Bayer process. The method comprises using a product comprising the combination of at least two surfactants together with an optional coupling agent to treat the alkaline slurry with certain amount of alumina trihydrate present. Synergistic effects between binary combinations of nonionic and anionic surfactants result in more efficient dewatering aids for alumina trihydrate slurry when combinations of such surfactants are applied. A coupling agent may be used in formulations to reduce viscosity of such surfactant combinations, allowing the practical application of such products. | 11-15-2012 |
| 20140161716 | METHOD FOR PREPARING POROUS ALUMINA - The present invention relates to a method for preparing a porous alumina which may be suitably used as a catalyst carrier, an adsorbent, and various surface coating agents and has a boehmite or pseudoboehmite structure having a fine and uniform particle size distribution and a large pore volume. | 06-12-2014 |
| 20150368117 | PROCESS FOR MAKING HIGH PURITY ALUMINUM OXIDE - A method comprising contacting high-purity acid, high-purity aluminum, and high-purity water to form a first solution in a heated non-contaminating vessel, wherein the aluminum is employed in at least a stoichiometric amount relative to the acid, heating the first solution in a non-contaminating container, to provide a mother liquor and solid aluminum salts, separating the solid aluminum salts from the mother liquor, heating the solid aluminum salts in a non-contaminating crucible, to provide alpha aluminum oxide, and, optionally, washing the alpha aluminum oxide with high-purity water after some or all of the heating of the solid aluminum salts to provide the alpha aluminum oxide. | 12-24-2015 |
| 423627000 | Reacting metallic aluminum with water or water vapor | 2 |
| 20150360941 | HYDROGEN PRODUCTION SYSTEM AND METHODS OF USING SAME - The present invention is directed to hydrogen production systems and methods of using same. The systems support a hydrogen production reaction that comprises aluminum and a catalyst or wool and van produce hydrogen on-demand. The hydrogen and the heat produced by the systems can be used for many applications, including to power vehicles, heat homes, or power electricity-producing power plants. | 12-17-2015 |
| 20160115041 | METHODS OF PREPARING HIGH PURITY ALUMINUM HYDROXIDE AND HIGH PURITY ALUMINUM OXIDE - This application discloses methods and processes for preparation of high purity aluminum hydroxide and high purity aluminum oxide. The method of preparing high purity aluminum hydroxide involves reacting aluminum with water in the presence of one or more catalysts and one or more complexing agents that can react with non-aluminum metal impurities to form soluble complexes for effective removal through rinsing. | 04-28-2016 |
| 423628000 | Forming catalyst, sorbent activated, or narrow pore alumina | 4 |
| 20100310448 | Regenerating Method for Activated Alumina Used in Regenerating Working Fluid of Hydrogen Peroxide - A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, then discharging exit gas and regenerated alumina through the discharge port on the top and discharging device on the bottom of the reactor respectively. The method is economic, environment-protective, safe, low-costly. The regenerated alumina will not poison palladium catalyst. | 12-09-2010 |
| 20110059008 | Regenerating Method for Activated Alumina Used in Regenerating Working Fluid of Hydrogen Peroxide - A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide with fire resistant alumina into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, discharging regenerated alumina and fire resistant alumina through the discharging device on the bottom of the reactor, discharging exit gas through the discharge port on the top of the reactor, the reaction temperature ranging from 360-800° C., the residence time of solid feed in the reactor ranging from 3-15 h. The method is economic, environment-protective, safe, and low-costly. The regenerated alumina will not poison palladium catalyst. | 03-10-2011 |
| 20120237439 | PROCESS FOR PREPARING AN ALUMINA WITH CONTROLLED MESOPOROSITY - A process for preparing a mesoporous alumina is described, comprising the following steps:
| 09-20-2012 |
| 20140369922 | METHOD OF SURFACE MODIFICATION OF ALUMINA - A method of surface modification of an alumina carrier. The method includes: 1) dissolving a soluble kazoe in deionized water to yield a kazoe aqueous solution; 2) submerging an alumina carrier in the kazoe aqueous solution and drying the alumina carrier in a vacuum environment; 3) placing the dried alumina carrier in a reactor, adding silicon tetrachloride and Grignard reagent dropwise to the reactor, sealing the reactor and heating it to a constant temperature, and maintaining the constant temperature for between 3 and 18 hours, where a volume ratio of the added silicon tetrachloride and the alumina carrier is between 0.5:1 and 5:1, the constant temperature is controlled to be between 160 and 350° C.; and 4) cooling the reactor, filtering, washing, and drying the alumina carrier in the vacuum environment. | 12-18-2014 |
| 423629000 | Hydroxide | 6 |
| 20100061924 | PROCESS FOR THE PRODUCTION OF ALUMINUM HYDROXIDE - Process for the production of aluminum hydroxide flame-retardants by wet-miling and spray-drying an aluminium hydroxide containing slurry. | 03-11-2010 |
| 20100272632 | PROCESS FOR NEUTRALIZING BAUXITE DISSOLUTION RESIDUAL SUBSTANCE AND PROCESS FOR PRODUCING ALUMINUM HYDROXIDE - A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/1 to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry. | 10-28-2010 |
| 20110256051 | METHOD FOR PRODUCING SPHERICAL ALUMINA POWDER - A production method comprising the steps of: spraying an aluminum hydroxide powder having a specific surface area measured by a nitrogen adsorption method of 0.3 m | 10-20-2011 |
| 20150017090 | ALUMINIUM HYDROXIDE POWDER AND METHOD FOR PRODUCING SAME - The present invention provides an aluminum hydroxide powder having a predetermined cumulative pore volume which falls within a range suited for the production of a high purity alumina, and a method for producing the same. It is possible to produce an aluminum hydroxide powder having high bulk density and high firing efficiency, and an aluminum hydroxide having high shape retention. | 01-15-2015 |
| 20160152468 | Method of preparing a catalyst for Producing Hydrogen from Al/water system and utility thereof | 06-02-2016 |
| 20180022613 | METHOD OF PRODUCING A HIGHLY-PURE ALUMINUM HYDROXIDE | 01-25-2018 |
| 423630000 | Utilizing carbon or compound thereof as reactant | 2 |
| 20090142256 | METHOD FOR PRODUCING A NANOSTRUCTURED MATERIAL - A method capable of easily producing a nanostructured material having regular nanoscale arrangement. The method comprises a raw material solution preparation step of preparing a raw material solution by dissolving, in a solvent, a block copolymer comprising a polymer block component “A” and a polymer block component “B” which are immiscible to each other, and an inorganic precursor which coordinates with the polymer block component “A” but does not coordinate with the polymer block component “B”; and a nanostructure-forming step of forming a nanophase-separated structure “ | 06-04-2009 |
| 20100111822 | Method for fabricating a high specific surface area mesoporous alumina - A method for fabricating a high specific surface area mesoporous alumina is disclosed, which includes the following steps: (a) providing a water solution containing an aluminum salt and a fluoro-surfactant; (b) adding concentrated hydrochloric acid to adjust the PH value of the solution to about 6.0 to 8.0; (c) aging the solution at 70° C. to 110° C. for 12 to 20 hours; (d) washing the precipitate with water; (e) washing the precipitate with an organic solvent; (f) drying the precipitate; and (g) sintering the precipitate in a furnace of 500° C. to 1000° C. | 05-06-2010 |
| 423631000 | Utilizing nitrogenous compound as reactant | 2 |
| 20090297433 | METHOD FOR OBTAINING A-ALUMINA CRYSTALS OR FIBERS USING THE VAPOR-LIQUID-SOLID (VLS) MECHANISM, BY CONTROLLING THE SLIGHTLY OXIDIZING ATMOSPHERES IN SYSTEMS THAT CONTAIN METAL Al AND SIO2 - The invention relates to a method for obtaining α-alumina crystals or fibers using the vapor-liquid-solid (VLS) mechanism, by controlling the slightly oxidizing atmospheres in systems that contain metal Al and SiO | 12-03-2009 |
| 20150376021 | ALUMINUM OXIDE PRODUCTION METHOD - The invention pertains to methods of producing aluminum trioxide in the form of powders or agglomerations with particles having a porous honeycomb structure, which can be used as catalyst substrates, adsorbents and filters for the chemical, food, and pharmaceutical industry. The method of production of aluminum oxide in the form of powders or agglomerations with particles having a porous honeycomb structure involves the treatment of the aluminum salt with a solution of an alkaline reagent, washing of the sediment and thermal treatment thereof. The technical result of the invention is the production of aluminum oxide in the form of separate particles with given structure and properties, specifically, with particle porosity of 60-80% and a porous structure represented by extensive parallel channels with near hexagonal packing, with dimension of the channels at the diameter of 0.3 to 1.0 mcm and length up to 50 mcm. For this, the aluminum salt used is crystals of aluminum chloride hexahydrate, which are treated with an excess aqueous solution of ammonia at temperature of 20-80° C. to form boehmite, and the heat treatment is done at 450-650° C. until aluminum oxide is formed. | 12-31-2015 |
