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8066969 Preparation method of magnetic and metal oxide nanoparticles  
This invention relates, in general, to a method of producing magnetic oxide nanoparticles or metal oxide nanoparticles and, more particularly, to a method of producing magnetic or metal oxide...
8062795 Separator and electrochemical device comprising the same  
Disclosed is a separator comprising inorganic particle or aggregates thereof having a unique spectrum or color pattern according to a predetermined rule. Also, disclosed are an electrochemical...
8048398 Process for preparing mixed metal oxide powders  
Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids...
7867471 Process for preparing advanced ceramic powders using onium dicarboxylates  
A process of producing a ceramic powder including providing a plurality of precursor materials in solution, wherein each of the plurality of precursor materials in solution further comprises at...
7820124 Monodisperse nanoparticles and method of making  
A material comprising a plurality of nanoparticles. Each of the plurality of nanoparticles includes at least one of a metal phosphate, a metal silicate, a metal oxide, a metal borate, a metal...
7488464 Metal oxide processing methods and systems  
Methods and systems for processing metal oxides from metal containing solutions. Metal containing solutions are mixed with heated aqueous oxidizing solutions and processed in a continuous process...
7357910 Method for producing metal oxide nanoparticles  
Method for producing metal oxide nanoparticles. The method includes generating an aerosol of solid metallic microparticles, generating plasma with a plasma hot zone at a temperature sufficiently...
7297321 Supermicroporous metal oxides  
A new class of supermicroporous mixed oxides, with pore sizes in the 10-20 Å range has been prepared utilizing basic metal acetates. The reactions are carried out in non-aqueous solvent media to w...
7285261 Preparation and application of novel chromium based nanocatalyst for gas-phase fluorination and hydrofluorination reactions  
A process of reacting a metal chloride, especially chromium (III) chloride, with an alkali metal oleate at a temperature of from about 30° to about 300° C., and especially at about 70±1° C., in a s...
7276226 Chromium dioxide (CrO2) and composites of chromium dioxide and other oxides of chromium such as CrO2/Cr2O3 and CrO2/Cr2O5) and process for manufacturing the same  
A novel process for preparing chromium dioxide of substantially high purity as well as composites of CrO2/Cr2O3 and CrO2/Cr2O5 following a sequence of simple steps. The process does not require...
7211607 Method for producing high surface area chromia materials for catalysis  
Nanostructured chromium(III)-oxide-based materials using sol-gel processing and a synthetic route for producing such materials are disclosed herein. Monolithic aerogels and xerogels having surface...
7122168 Shape anisotropic metal oxide nanoparticles and synthetic method thereof  
In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (γ-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape ...
7081234 Process of making hydrophobic metal oxide nanoparticles  
A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The...
7012037 Chromia spray powders  
Particles particularly useful for thermal spraying a wear resistant coating on to a substrate comprise an essentially single phase crystalline structure comprising from 45 to 99% by weight of...
6984369 Process for making surfactant capped metal oxide nanocrystals, and products produced by the process  
Disclosed is a process for making surfactant capped nanocrystals of metal oxides which are dispersable in organic solvents. The process comprises decomposing a metal cupferron complex of the...
6908600 Method for obtaining pigments for ceramic and glass, and pigments obtained thereby  
A method for obtaining pigments for ceramic and glass, particularly for substrates and coatings, including a step of adding a solution of an iron salt to at least one silicon addition agent...
6869596 Ultraviolet light screening compositions  
A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the...
6803027 Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders  
A process is disclosed for forming a nanosize ceramic powder. A precursor ceramic material is formed of a fugitive constituent and a non-soluble constituent in a single phase. The precursor is...
6780393 Method of producing fine particles of metal oxide  
A method of producing fine particles of an oxide of a metal, comprising the steps of: preparing an acidic solution which contains ions of the metal; precipitating fine particles of a hydroxide of...
6447594 Strontium chromate corrosion inhibitor pigment with reduced solubility  
A process for producing a strontium chromate corrosion inhibitor includes the steps of providing an aqueous slurry containing dispersed particulate strontium chromate, adding to the slurry a...
6410470 Thermal spray powder process  
It is found that calcining chromium oxide powders having a particle size component smaller than 10 microns reduces the volume proportion of smaller particles and increases the general uniformity of...
6203768 Process for the production of ultrafine particles  
A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves...
6136288 Firing fines  
Fine powders of ceramic materials can be obtained by firing a precursor powder in a rotary kiln while carried on coarse carrier particles.
6060422 Process for producing acrylic acid  
A process for producing acrylic acid from propane and oxygen gas through a vapor-phase catalytic oxidation reaction, said process comprising conducting the reaction using as a catalyst a metal...
5972301 Minimizing emission of hexavalent chromium from combustion sources  
Formation of hexavalent chromium is reduced during incineration/combustion of materials containing hexavalent chromium by adding to the waste prior to or during combustion a small amount of sulfur....
5855862 Process for the preparation of an oxide, especially a transition metal oxide  
A method for preparing an oxide (P), which includes the steps of (i) forming a solid phase compound (O) based on an oxide containing molecular entities (1) chosen from optionally substituted...
5840267 Method for producing metal oxide powders  
A method for producing a metal oxide powder which comprises heating a metal or metals in an atmosphere gas comprising a halogen gas, a hydrogen halide gas or a mixture of these gases in a...
5811068 Method for producing oxide powder  
Disclosed is a method for producing oxide powders and complex oxide powders having an oxygen amount smaller than the stoichiometric amount. The method comprises: spraying a combustible liquid that...
5714236 Decorative method and material  
A method of decorating a firable article which includes the step of mixing a metallic salt with a fuel material which can supply oxygen to the salt in a reaction. This mixture causes complex...
5660809 Inorganic oxide-based materials with monodispersed particle size  
A method for preparing inorganic oxide-based materials of spherical form with substantially monomodal distribution, consisting of forming a sol of at least one of the inorganic oxides of interest,...
5635154 Process for producing fine metal oxide particles  
Disclosed herein is a process for producing fine metal oxide particles comprising the step of heat-treating an aqueous solution of a metal salt at a temperature of not lower than 200° C. under a ...
5571489 Process for chromium recovery from aqueous solutions  
A process for recovery of chromium in an aqueous solution comprising converting the chromium to chromyl chloride, separating the chromyl chloride from the aqueous solution, either as a heavy...
5520902 Process for making chromium-free orthorhombic sodium sulfate  
Disclosed is a process for making orthorhombic Na2 SO4 containing less than 0.1 ppm chromium from a solution of Na2 SO4 containing 0.1 to 100 ppm Cr(III). The Cr(III) is oxidized to Cr(VI) at a pH...
5391364 Inorganic oxide aerogel microbeads of narrow pore diameter distribution and the method for their preparation  
Microbeads of aerogels of one or more oxides are characterised by a high porosity and the fact that at least 90% of the pores present have a diameter lying within a very narrow range. The surface...
5378383 Process for preparing modified chromium dioxide  
A magnetic recording medium comprising a nonmagnetic substrate and at least one magnetic layer applied thereon and containing an acicular chromium dioxide uniformly distributed in a polymeric...
5336475 Process for chromium removal using an inorganic sulfur compound  
A method has been devised for removing chromium ions from a chromium ion containing liquid and recovering chromium oxide in a usable form by (a) adjusting the temperature of the liquid to an...
5256306 Continuous treatment of chromium bearing waste water  
The present invention provides a composition and process for the treatment of waste water containing chromium compound, for example water from a plating operation which includes significant...
5211853 Method for the removal of chromium compounds from aqueous solutions  
A process for precipitating and removing chromium compounds in which chromium is in the hexavalent state from aqueous liquids, particularly, alkaline earth metal or alkali metal chlorate-rich...
5164173 Preparation of stabilized acicular ferromagnetic chromium dioxide  
Stabilized acicular ferromagnetic chromium dioxide is prepared by a method in which the chromium dioxide surface formed as a result of a reductive treatment is treated with adsorbed monobasic or...
5122238 Efficient electrolytic method of making chromic acid from sodium bichromate  
Disclosed is a method of making chromic acid by electrolyzing an aqueous solution of sodium bichromate until the sodium bichromate is converted to chromic acid at a bichromate percent conversion of...
5114702 Method of making metal oxide ceramic powders by using a combustible amino acid compound  
This invention is directed to the formation of homogeneous, aqueous precursor mixtures of at least one substantially soluble metal salt and a substantially soluble, combustible co-reactant...
5108732 Process for the preparation of finely divided ceramic oxide powders from precursor compounds  
A process for preparing finely-divided oxides of metals of metalloids of the elements of main groups III and IV and sub-groups III, IV, V and VI of the Periodic System of Elements, comprising...
5064549 Preparation of stabilized chromium dioxide with sodium tetracarbonylferrate  
Stabilized acicular ferromagnetic chromium dioxide is prepared by reductive treatment of the chromium dioxide with Na2 [Fe(CO)4 ], and this material is present in magnetic recording media.
5034211 Reducing turbidity in chromic acid solutions  
Disclosed is a method of reducing the turbidity of an aqueous solution of chromic acid which is formed by dissolving melted chromic anhydride in water. The chromic anhydride is contacted with water...
5032377 Chromium oxide green, a process for its production and its use  
Chromium oxide green in the form of donut-shaped, ring-shaped or tire-shaped particles having an internal diameter of from 0.01 to 0.5 mm and an external diameter of from 0.05 to 1.0 mm is prepared...
5030371 Process for preparing acicular ferromagnetic material consisting essentially of iron-containing chromium dioxide  
An acicular, ferromagnetic material which has a high coercive force and essentially consists of iron-containing chromium dioxide is prepared by thermal decomposition of hydrated chromium(III)...
5009877 Stabilization of acicular ferromagnetic chromium dioxide  
Acicular ferromagnetic chromium dioxide is stabilized by treatment with an alkali metal hydroxide in an aqueous alkaline suspension at elevated temperatures.
4976948 Process for producing free-flowing chromium oxide powders having a low free chromium content  
A process is disclosed for producing chromium oxide powders, which comprises forming an aqueous slurry wherein the solids content is a mixture which consists essentially of in percent by weight...
4853207 Process for the manufacture of vitreous metal oxides  
Process for the manufacture of vitreous metal oxides in which a metal alcoholate derived from an alcohol, the pka of which is less than 15.74, is hydrolysed with an aqueous medium, the pH of which...
4828818 Chromium aerogel method of producing same and fluorinating process utilizing same  
Chromium(III) oxide and hydroxide aerogels are produced by the reaction of chromium(VI) oxide with a solvent which is reducing to chromium(VI), such as methanol, heating the solution to...
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