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7438977 |
Gibbsite type aluminum hydroxide particles having high oil absorption
The present invention provides gibbsite type aluminum hydroxide particles having a primary particle diameter of from 0.01 μm to 0.3 μm and a DOP oil absorption of from 90 mL/100 g to 300 mL/100 g.
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7390343 |
Drinking water filtration device
The invention is a device for purifying drinking water that has at least one fibrous structure. Preferably, there is an upstream and downstream fibrous structure. Each fibrous structure is a...
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7311752 |
Electrostatic air filter
The invention is a filter for gaseous media in which nano alumina fibers and second fibers are arranged in a matrix to create asymmetrical pores. The filter is a high efficiency, high capacity...
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7022305 |
Nanoscale corundum powders, sintered compacts produced from these powders and method for producing the same
Nanoscale corundum powders are obtained by first producing an Al 2 O 3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the...
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7008609 |
Method for producing hydrogen gas utilizing mechano-corrosive reaction
There is provided a method of producing hydrogen gas serving as fuel for a portable fuel cell, whereby hydrogen gas can be provided easily, safely, and at a low cost. To that end, the method of...
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6972096 |
Chemical-mechanical polishing process
A chemical-mechanical polishing process for planarizing at least one or more of thin films formed on a substrate, wherein the chemical-mechanical polishing is performed using a slurry containing...
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6926875 |
Porous material process of producing the porous material, catalyst for purifying exhaust gas comprising the porous material, method of purifying exhaust gas
Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meson-pore region, sharp pore size...
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6838005 |
Nanosize electropositive fibrous adsorbent
Aluminum hydroxide fibers approximately 2 nanometers in diameter and with surface areas ranging from 200 to 650 m 2 /g have been fount to be highly electropositive. When dispersed in water they are...
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6638493 |
Method for producing hydrogen
The process for producing hydrogen gas according to the present invention consists of reacting aluminum with water in the presence of sodium hydroxide as a catalyst. In one aspect of the present...
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6511642 |
Porous material, catalyst, method of producing the porous material and method for purifying exhaust gas
Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meso-pore region, sharp pore size...
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6403007 |
Method for manufacturing plate boehmite
Method for manufacturing a plate boehmite and a plate alumina having high catalytic activity. The plate boehmite is prepared by subjecting at least one kind of an alkaline earth metal compound,...
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6143816 |
Fire retardant plastic mixture and method of producing a filler material
A fire-retardant plastic mixture contains 55%-75% by weight of boehmite which has an orthorhombic crystal structure and has the general formula AlO x (OH) 3 -2x with x-values ranging between 0.8...
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6129904 |
Aluminum oxide masses with very narrow pore radius distribution
An aluminum oxide mass characterized by a specific surface area greater than or equal to 70 m 2 /g and a narrow pore radius distribution, with at least 90% of the pore radii being approximately...
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5989515 |
Process for producing an acidic aqueous alumina sol
A process for producing a stable acidic aqueous alumina sol containing 50 to 300 nm of elongate secondary particles which are elongated in only one plane and formed by edge-to-edge coagulation of...
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5964936 |
Oxidized colored aluminium pigments, process for their production and their use
The invention concerns oxidised aluminium or aluminium alloy pigments having a content of metallic aluminium of not more than 90% by weight with respect to the total weight, wherein the pigments...
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5435986 |
Method for preparing high purity aluminum hydroxide
An improved process for making high purity aluminum hydroxide [Al(OH) 3 .3H 2 O] of the hydrargillite form containing the steps of: (a) adding a non-powdered aluminum solid, preferably aluminum...
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5290535 |
Process for recycling saltcake
Saltcake generated by the aluminum industry is completely recycled through a process that simultaneously liberates the contained aluminum metal and dissolves the soluble salt fluxes to recover...
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5225229 |
Aluminum hydroxide production
A method for the production of aluminum hydroxide, including reacting water in the liquid phase and aluminum at a pH above about 12.4. In this pH range, aluminum hydroxide is produced at acceptable...
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5026612 |
Structures fabricated from aluminum components and processes involved in making these structures
A process for forming a structure of aluminium components comprises pre-treating aluminium sheet to produce an inorganic non-metallic surface coating thereon, forming the pre-treated sheet to...
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4822592 |
Producing alpha alumina particles with pressurized acidic steam
Alumina particles having average particle size of about 1-20 microns are converted to alpha alumina in a steam-fluidized bed maintained at about 380°-600° C. and a pressure greater than about...
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4746503 |
Method of treating alumina to increase slurry life
A process for treating dry, particulate alumina for use in preparing alumina slurries which are resistant to gellation in which the particulate alumina is contacted with a carbon dioxide rich...
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4732741 |
Method of making beta"-alumina
A method of making beta"-alumina comprises dispersing in a precursor of aluminum oxide a member of the group comprising sodium oxide and its precursors, and dispersing in the precursor of aluminum...
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4615875 |
Process for preparing high purity alpha-alumina
High purity alumina with a low sodium content and with a friable, easily ball milled structure is produced in this invention through a modified sol-gel procedure which includes digestion of the...
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4447351 |
Preparation of alumina hydrosol from aluminum sulfate solution
The present invention relates to a method of preparing an alumina hydrosol from an aluminum sulfate solution. The subject method comprises the steps of admixing a stoichiometric amount of a metal...
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4348366 |
Process for the production of alumina and alumina compounds from wastes
A process for the recovery of substantially all of the aluminum from aluminum bearing waste products which includes a method for the commercial production of alumina and compounds of alumina.
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4291011 |
Method for production of aluminum oxide
High purity aluminum oxide is produced by continuously reacting high purity metallic aluminum, either solid or liquid, with high purity oxygen, present in stoichiometrically excessive amount,...
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4252776 |
Aluminum dross processing
There is disclosed a method for the elimination of the chief impurities in aluminum dross tailings. The dross tailings, which are chiefly particles of aluminum oxide, are suspended in an aqueous...
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4151267 |
Process for producing alumina
Pure alumina is produced from aluminum metal by steps of activation by stripping the oxide layer in an acidic aqueous medium; washing in a neutral medium; reacting in a neutral, acidic or alkaline...
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3962407 |
Process of preventing corrosion of a metal walled system containing molten fluoride
A method of manufacturing an airtight-sealed system comprising one or more molten alkalifluorides in the operating condition. The corrosive action of oxygen present in the melt is prevented by...
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3925256 |
Method of sol manufacture
Aluminum metal is digested in hydrochloric acid at conditions to form an alumina sol. The hydrochloric acid is aerated with air to effect a substantial increase in the rate of reaction.
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3876453 |
Method for painting aluminium or aluminium-based alloy material
A strong base layer for painting on an aluminous material, a thermosetting resin paint and a painted film having high cohesion and corrosion resistance are produced by forming a boehmite layer in...
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3658469 |
CONTINUOUS PRODUCTION OF ALUMINA WHISKERS
A method and apparatus for making single crystal alpha-alumina in the form of whiskers of width and thickness generally of 0.100-100 microns. Whiskers are grown in a continuous process within the...
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3514256 |
FIBROUS CORUNDUM AND ITS PREPARATION
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3494733 |
METHOD FOR THE PRODUCTION OF ALUMINA TRIHYDRATE DOMINANT IN BAYERITE
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3488147 |
PREPARATION OF ALUMINA BY HYDROLYSIS OF ALUMINUM
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3429660 |
ALUMINA PRODUCTION
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3421851 |
METHOD OF GROWING ALPHA-ALUMINA SINGLE CRYSTAL RIBBONS
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3384458 |
Water hydrolysis reactor for making alumina
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3273962 |
Process for producing oxides in the form of hollow shells
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3264228 |
Method of preparing alumina coated catalyst compositions
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3071436 |
Manufacture of alumina hydrogel
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3055736 |
Process for manufacturing aluminum oxide
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3039849 |
Aluminum oxide production
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2989372 |
Production of alumina
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2983690 |
High-surface-area alumina and catalysts containing same
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2982614 |
Process for producing alumina
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2958583 |
Production of alumina
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2950169 |
Process for preparing shaped alumina particles of high crushing strength
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2914488 |
Preparation of eta alumina utilizing chlorine and ammonia
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2872418 |
Production of alumina-halogen composites
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