Matches 51 - 100 out of 353 < 1 2 3 4 5 6 7 8 >
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6156289 Iron based roofing granules and method of coloring same  
Method of preparing colored roofing granules (18) from granulated mineral-containing matter having an elemental iron content of about 15% to about 70% is disclosed. The method comprises heating the...
6139618 Fine yellow composite iron oxide hydroxide pigment, and paint or resin composition using the same  
A fine yellow composite iron oxide hydroxide pigment of the present invention has an average major axial diameter of not less than 0.005 μm and less than 0.1 μm, which comprises: fine goethite...
6124022 Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium, and magnetic recording medium using the same  
Acicular hematite particles of the present invention comprise a geometrical standard deviation of major axis diameter of not more than 1.50, a geometrical standard deviation of minor axis diameter...
6113792 Method for removing contaminants from water using membrane filtration in combination with particle adsorption to reduce fouling  
Heated iron oxide particles are combined with membrane filtration to remove contaminants from water. The use of the heated particles reduces fouling of the membrane typically encountered when...
6093236 Porous pellet adsorbents fabricated from nanocrystals  
Pelletized adsorbent compositions and methods of adsorbing toxic target compounds are provided for the destructive adsorption or chemisorption of toxic or undesired compounds. The pelletized...
6086846 Use of synthetic, iron raw materials for preparing iron oxide pigments  
The invention relates to the use of synthetic (synthetically produced) iron raw materials to prepare iron oxide pigments in the Penniman process and other iron-dissolution processes.
6080337 Iron oxide particles  
Electromagnetic shielding material is formed from a shielding composition made with magnetic particles and a binder, where the magnetic particles have an average diameter less than about 1000 nm...
5994611 Method of incinerating plastic products containing ferric oxide hydroxide particles  
The disclosure describes plastic formed products comprising: one selected from the group consisting of a thermoplastic resin and a thermosetting resin; and 0.1 to 10 wt % of at least one selected...
5954969 Recovery of iron oxides from polluted coal mine drainage  
A method and system is provided for producing a commercially usable iron oxide material by treating iron contaminated water. A clean effluent is also produced. Iron contaminated water is sampled to...
5916360 Process for the preparation of iron oxide yellow pigments and the use thereof  
The present invention relates to a process for the preparation of iron oxide yellow pigments by the process of precipitation from iron(II) chloride and from an alkaline component as well as the use...
5911967 Process and apparatus for production of ferric oxide from iron chloride solutions  
A process and an apparatus for the production of iron oxides having low chloride ion content comprising charging of a free HCl containing iron chloride solution into a spray roaster with a feeding...
5911905 Processes for producing hydrated iron oxide and ferromagnetic iron oxide  
In a process for producing hydrated iron oxide which comprises the steps of adding an aqueous alkali solution to an aqueous solution of a ferrous salt in an amount no more than a neutralizing...
5885545 Highly transparent, yellow iron oxide pigments, process for the production thereof and use thereof  
The present invention relates to a process for the production of yellow, highly transparent iron oxide pigments of elevated chemical purity, to yellow iron oxide pigments obtainable in this manner...
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...
5837051 Process for the thermal treatment of iron oxides in a circulating fluidized bed  
The present invention relates to a process for the production of iron oxide brown, red and black pigments and to the use thereof.
5817291 Method of ultrasonic imaging comprising administering biocompatible spheres or particles  
A method of contrast enhanced ultrasonic diagnostic imaging comprising administering to a subject a contrast enhancing amount of spheres or particles comprising a matrix enclosing a contrast agent...
5814164 Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures  
A thin-walled monolithic iron oxide structure, and process for making such a structure, is disclosed. The structure comprises a monolithic iron oxide structure obtained from oxidizing a thin-walled...
5770172 Process of forming compounds using reverse micelle or reverse microemulsion systems  
The present invention is directed to a process for producing a nanometer-sized metal compound. The process comprises forming a reverse micelle or reverse microemulsion system comprising a polar...
5730794 Use of synthetic, bainite-rich iron raw materials for preparing iron oxide pigments  
The invention relates to the use of synthetically produced, bainite-rich iron raw materials to prepare iron oxide pigments.
5718880 Method of increasing the bulk density of iron oxide powder  
A method is provided of rapidly increasing the bulk density of an iron oxide powder by preventing the powder, processed by a roller consolidation machine, from flying up. The method consists of...
5685993 Apparatus and method for ferrite formation and removal of heavy metal ions by ferrite co-precipitation from aqueous solutions  
Embodiments of an apparatus and method for ferrite formation and the removal of heavy metal ions by ferrite co-precipitation from an aqueous solution at ambient temperature have been developed....
5679323 Hepatocyte-specific receptor-mediated endocytosis-type compositions  
A new class of magnetic resonance (MR) contrast agents are described whose in vivo biodistribution is based upon the ability of certain cells to recognize and internalize macromolecules, including...
5650131 Process for making goethite  
Spindle-shaped goethite particles are produced by oxidizing a ferrous carbonate intermediate in the presence of a growth modifier, or alternatively by changing the flowrate of oxidizing gas during...
5641470 Process for making goethite  
This invention provides a method of producing goethite particles comprising the steps of a) reacting, in aqueous solution, less than a stoichiometric amount of an alkali compound with an iron (II)...
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...
5614012 Highly transparent, red iron oxide pigments, process for the production thereof and use thereof  
The present invention relates to a process for the production of red, transparent iron oxide pigments of elevated chemical purity, to iron oxide pigments obtainable in this manner and to the use...
5597547 Reduction of residual chloride in iron oxides  
A process for reducing the residual chloride present in iron oxides, particularly in regenerated iron oxides produced from hydrochloric acid waste liquid generated from steel pickling, by...
5591506 Non-polluting alkali-metal bisulfate system for producing titanium dioxide pigment  
Alkali-metal bisulfate is employed in a non-polluting and economically-feasible system for producing titanium dioxide pigment from titanium mineral or slag with recycling of alkali-metal bisulfate...
5569445 Fine acicular α-ferric oxide and production thereof  
Disclosed herein is fine acicular α-ferric oxide which has the crystallite diameter (D 1014 ) in the direction perpendicular to the (1014) plane and the crystallite diameter (D 1120 ) in the...
5508017 Process for the preparation of acicular α-iron oxide hydrate  
A process for the preparation of acicular α-iron oxide hydrate which comprises oxidizing a slurry of ferrous hydroxide having an excessive alkali concentration of 1.0 mol/l or above with an...
5480571 Process for producing acicular goethite particles and acicular magnetic iron oxide particles  
Disclosed herein are a process for producing acicular goethite particles comprising the step off: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous...
5472477 Process for the preparation of finely divided metal and ceramic powders  
The present invention relates to a process for the preparation of finely divided metal and/or ceramic powders by reacting appropriate metal compounds and appropriate reagents in the gas phase (CVR)...
5451253 Preparation of transparent yellow iron oxide pigments  
A process for preparing transparent yellow iron oxide pigments by the precipitation of iron (II) hydroxide by adding an inorganic base to an iron (II) salt solution and subsequent oxidation to FeOOH.
5449565 Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium  
Disclosed herein are magnetic composite iron oxide particles comprising spinel-type Fe 3 O 4 particles as core particles and spinel-type CoFe 2 O 4 outerlayer of the composite iron oxide...
5437805 Particles containing iron carbide  
The present invention provides acicular particles (A) containing an iron carbide, which have (a) a free carbon content of at most 20 wt. %, and (b) and Fe 5 C 2 ratio(x) of at least 70% and a...
5421878 Pure-colored iron oxide direct red pigments, a process for their production and their use  
This invention relates to new pure-colored iron oxide direct red pigments, to a process for their production and to their use for pigmenting lacquers, plastics, building materials and ceramics.
5411801 Plate-like magnetite particles and process for producing the same  
Disclosed herein are a process for producing poreless plate-like magnetite particles which have as large a plate ratio (average particle diameter/thickness) as possible and which are discrete each...
5411730 Magnetic microparticles  
Superparamagnetic particles are provided for medical applications including hyperthermia techniques, localized heating and tissue-specific release of therapeutic agents, and magnetic resonance...
5407463 Recovery of Cd and Ni from batteries  
Method for recovering cadmium (Cd), nickel (Ni) and iron (Fe) from batteries containing the steps of: (a) reducing the size of the batteries to small pieces and separating the pieces into a coarse...
5399278 Process for producing acicular goethite particles and acicular magnetic iron oxide particles  
Disclosed herein are a process for producing acicular goethite particles comprising the steps of: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous...
5378380 Process for producing acicular geothite particles and acicular magnetic iron oxide particles  
Disclosed herein are a process for producing acicular goethite particles comprising the step of: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous...
5370857 Process for producing monohydrated beta-ferric oxide  
A process for producing stable, high purity ferrate (VI) employing beta-ferric oxide (beta-Fe 2 O 3 ), and preferably monohydrated beta-ferric oxide (beta-Fe 2 O 3 .H 2 O) as the iron source. An...
5368640 Transparent iron oxide pigments, processes for their production and their use  
The invention relates to transparent iron oxide pigments having an average particle size, based on the longest needle axis, of less than 0.1 μm, to processes for their production and to their use...
5368933 Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles  
Disclosed herein is superparamagnetic fine particles of iron oxide having an unsaturated fatty acid adsorbed on the surface of superparamagnetic fine particles and having a magnetization of not...
5338355 Method of preparing goethite  
The present invention relates to a method of preparing Si-containing goethite (α-FeOOH) by the precipitation of Fe(II) salts with an excess of base, and subsequent oxidation in the presence of a...
5316746 High purity iron oxide and method for production hereof  
A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 μm, removing fine particles from the powder, and...
5312602 Method for purifying iron oxide  
A method is described for purifying iron oxide, for example, in the form of magnetite or hematite slime, which preferably contains quartz as the impurity. The method comprises calcinating the iron...
5277368 Coal cleaning process  
Fine particle coal is beneficiated in specially designed dense medium cyclones to improve particle acceleration and enhance separation efficiency. Raw coal feed is first sized to remove fine coal...
5244649 Production of hematite pigments in the form of platelets  
Iron oxides in the form of platelets are produced by hydrothermal treatment of aqueous suspensions containing iron(III) hydroxide or oxide hydrates in the presence of alkali metal hydroxides and of...
5217584 Process for producing ferrate employing beta-ferric oxide  
A process for producing stable, high purity ferrate (VI) employing beta-ferric oxide (beta-Fe 2 O 3 ) and as the iron source. The process results in the efficient and effective productions of...
Matches 51 - 100 out of 353 < 1 2 3 4 5 6 7 8 >