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7604793 |
Iron oxide precipitation from acidic iron salt solutions
Improved methods for treating metallurgical compositions involve reacting a metallurgical composition with an aqueous nitric acid solution. The reaction is performed at a pressure or at least about...
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7566436 |
Counter current mixing reactor
A mixing reactor for mixing efficiently streams of fluids of differing densities. In a preferred embodiment, one of the fluids is supercritical water, and the other is an aqueous salt solution....
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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...
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7482382 |
Process for preparing nano-sized metal oxide particles
The present invention is directed to novel sol-gel methods in which metal oxide precursor and an alcohol-based solution are mixed to form a reaction mixture that is then allowed to react to produce...
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7425234 |
Iron oxide pigments
The invention relates to iron oxide pigments comprising an average solid body diameter of 0.1 to 500 μm, and to the production and use thereof.
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7410625 |
Process of making metal containing iron oxide and iron sulfide based nanoparticle materials
A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200-360° C. is...
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7387671 |
Iron oxide pigments
Iron Oxide pigment containing greater than 99% iron oxide, having a chloride content of less than 0.1% and a mean solid diameter of 10 to 500 μm and methods of making the same are disclosed.
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7347893 |
Iron oxide pigments from mill scale
The current invention relates to a method of manufacturing iron oxide pigments from mill scale. The mill scale is mixed with alien iron oxide and the resultant mixture is heated to a temperature of...
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7294319 |
Method for precipitating iron from a zinc sulphate solution as hematite
This invention relates to a method for the removal of iron as hematite from a zinc sulphate solution in atmospheric conditions during the electrolytic preparation of zinc. According to the method,...
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7267777 |
Method for the removal of contaminant metal ions from waste water
Method for removal of heavy metal ions from aqueous wastes, which are produced during electroplating and other industrial processes. The method comprises a precipitation process that is conducted...
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7235127 |
Reduction- and oxidation-stable iron oxide black pigments having high colour strength for colouring plastics and building materials, their preparation and their use
The present invention relates to reduction- and oxidation-stable iron oxide black pigments having high color strength, the preparation thereof and the use thereof.
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7220360 |
Integrated technology in sequential treatment of organics and heavy metal ions wastewater
This invention offers an integrated technology in sequential treatment of wastewater. Low biodegradable organics and heavy metal ions are both contained in wastewater from surface finishing...
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7217400 |
Preparation of iron compounds by hydrothermal conversion
An apparatus and continuous process for the conversion of one solid iron compound to another solid iron compound in a heterogeneous suspension wherein the suspension is formed by dispersing a solid...
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7208134 |
Bioprocesses enhanced by magnetic nanoparticles
One aspect of the present invention relates to magnetic nanoparticles colloidally stabilized in aqueous milieu by association with an organic phase. The organic phase may be either a fluorinated...
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7186395 |
Iron oxides with a higher degree of refining
Iron oxides are upgraded by calcining at from 700 to 1200° C.
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7182929 |
Nanostructured multi-component and doped oxide powders and method of making same
A method for producing nanostructured multi-component or doped oxide particles and the particles produced therein. The process includes the steps of (i) dissolving salts of cations, which are...
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7163667 |
Production process for oxide magnetic material and oxide magnetic material
A production process for an oxide magnetic material comprising the steps of blending raw material powder so as to take the composition of a hexagonal ferrite including: at least one kind of an...
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7144561 |
Method for the preparation of iron hydroxide, iron oxide hydrate or iron oxide from filter salts of dilute acid recovery
Described is a method for the manufacture of iron hydroxide, iron oxide hydrate or iron oxide from filter salts from thin acid recovery, in which the filter salts are dissolved in water, the...
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7135161 |
Method of producing nanosized oxide powders
A method of forming metal oxide powders includes the steps of solid state mixing of at least one metal nitrate salt, such as Fe(NO 3 ) 3 or a combination of metal nitrate salts such as Zn(NO 3 ) 3...
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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-Fe 2 O 3 ) nanoparticles usable as a superhigh density magnetic recording substance by having good...
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7105144 |
Method for producing ferrite hollow particles
A method for producing ferrite hollow particles having a hollow structure formed by mutual sintering of ferrite powder, including: a) a step of mixing a resin powder and a ferrite powder of a...
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6926912 |
Metal compounds, mixed or sulphated, as phosphate binders
A non-aluminum containing mixed metal compound for pharmaceutical use, which may, for example, be a mixed metal hydroxy carbonate containing magnesium and iron, and may have a hydrotalcite...
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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...
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6863877 |
Iron oxides of reduced chloride content
A process for removing chloride from chloridic iron oxide comprises mixing said chloridic iron oxide with an acid and subsequently conducting a thermal treatment at from 50 to 1300° C.
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6849187 |
Arsenic removal media
Disclosed is a heavy metal removal media containing ferric hydroxide having unique levels of microporosity and mesoporosity/macroporosity, and/or a specific average particle size and/or granule...
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6818052 |
Method for production of iron ioxide pigments
The invention provides a process for the production of iron based pigments and anticorrosive additives from elemental iron comprising: a) reacting iron Fe° with ferric sulphate Fe 2 (SO 4 ) 3 and...
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6797240 |
Process and apparatus for the extraction and regeneration of acids from spent acids
Process and apparatus for regenerating spent acid liquor includes a primary roasting furnace for evaporating a substantial portion of the liquid from the spent acid to produce acid vapors and...
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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...
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6770773 |
Organic acid-Fe-OOH (ferroxane) particles and ferroxane-derived ceramics and ceramic membranes
The present invention relates to ferroxanes and a method of making wherein a ferroxane may be defined by the general formula [Fe(O) x (OH) y (O 2 CR) z ] n wherein x, y and z may be any integer or...
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6758894 |
Strontium iron manganese black pigment
A black pigment substantially free of objectionable transition metal materials is disclosed. This pigment is particularly useful for coloring glass since the absence of the transition metal gives...
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6716555 |
Positive active material for secondary battery, process for preparation thereof and non-aqueous secondary battery comprising same
The positive active material for secondary battery according to the invention comprises O, Fe in an amount of higher than 25% by weight, and V in an amount of from higher than 0% by weight to less...
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6692719 |
Process for regeneration of acid halide solutions
A process is disclosed for regenerating an aqueous acid halide leachant from a spent aqueous metal halide leach liquor. The process comprises introducing into a fluidized bed or spray roaster a...
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6660242 |
Alkaline earth metal ferrite and ferric oxide admixture
A method is disclosed for the manufacture of particles composed of an intimate admixture of barium or strontium ferrite and ferric oxide from a chloride solution containing barium or strontium ions...
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6645445 |
Process for removing titanium oxide or red oxide from ethylene glycol
A process for efficiently removing titanium oxide or red oxide from an ethylene glycol solvolysis product of a polyester containing titanium oxide or red oxide. The process comprises the steps of: ...
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6616747 |
Process for producing granular hematite particles
The process for producing granular hematite particles of the present invention, comprises passing an oxygen-containing gas through an aqueous ferrous nitrate solution in the presence of iron...
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6530987 |
Method for producing iron oxide pigments from waste acid resulting from TiO2 production
Process for the preparation of iron oxide pigments from the waste acid resulting from the preparation of titanium dioxide by the sulfate process, characterized in that in a first stage a partial...
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6511646 |
Treatment of iron chloride from chlorination dust
A process for producing chlorine and iron oxide from iron chloride (which may be generated as a by-product of the direct chlorination of titaniferous ores) comprises the steps of converting ferrous...
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6503315 |
Process for producing iron oxide pigments
The present invention relates to a process for producing iron oxide red pigments containing the step of forming a suspension of haematite nuclei by reaction between dilute nitric acid and elemental...
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6492016 |
Method for preparing spherical ferrite beads and use thereof
The invention allows the fabrication of small, dense, highly polished spherical beads of hexagonal ferrites with selected compositions for use in nonreciprocal microwave and mm-wave devices as well...
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6488901 |
Method of adjusting a circulating fluidized bed and use of the method
A process for adjusting a circulating fluidized bed, wherein a part of the carrier gas is recovered, mixed with a propellant and returned to the fluidized bed as a carrier gas.
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6468498 |
Composite metal material, preparation thereof and photocatalytic process using same
A composite metal material of formula (I) are stable and not deteriorated for a long time and have excellent activities in photolyzing water with visible light: x(A)y(B)z(C)-p(P)n(N) (I) wherein,...
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6432377 |
Particles for non-magnetic undercoat layer of magnetic recording medium, method thereof and magnetic recording medium
The present invention provides particles for a non-magnetic undercoat layer of a magnetic recording medium, which comprises acicular hematite particles having an average major axial diameter of not...
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6398863 |
Spindle-shaped hematite particles and process for making spindle-shaped hematite particles
Spindle-shaped hematite particles obtained form the spindle-shaped goethite particles, can be prevented as highly as possible from causing destruction of particle shape when subjected to a...
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6302952 |
Process for the production of black iron oxide pigments
A process for the production of a black iron oxide pigment from Fe 2 O 3 hematite iron oxide which may be an impure oxide produced by the "Ruthner" process or by other means, or which may be a...
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6277354 |
Process for the recovery of chlorine from iron chlorides
The present invention provides a process for recovering the chlorine value from a particulate feed stream of metal chlorides wherein the total energy and reactant mass flow are managed to minimize...
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6231661 |
Fine red iron oxide pigment, and paint or resin composition using the same
A fine red iron oxide pigment of the present invention comprises hematite particles and having a geometrical standard deviation of major axial diameter of not more than 1.5, a geometrical standard...
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6214310 |
Process for the extraction and regeneration of acids from spent acids
Process and apparatus for regenerating spent acid liquor includes a primary roasting furnace for evaporating a substantial portion of the liquid from the spent acid to produce acid vapors and...
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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...
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6179908 |
Iron oxide red pigments, process for the production of iron oxide red pigments and use thereof
The present invention relates to iron oxide red pigments, a process for the production of iron oxide red pigments by calcining iron oxide yellow pigments or iron oxide black pigments, and the use...
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6159435 |
Leaching of mineral ores
A process for oxidation of ferrous ions in solution, and more particularly a process for improved base metal and/or uranium leaching from ores, concentrates or tailings using ferric ion as an...
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