In producing a copper concentrate by flotation in which copper minerals are separated from arsenic minerals by using oxoacids of sulfur and oxidants, the arsenic in the copper concentrate is reduced by a simple method. In producing the copper concentrate by the flotation in which an arsenic-containing copper ore is a raw material, the oxoacids of sulfur and hydrogen peroxide as the oxidant are used together as additive reagents, and added in this order.
To provide a manufacturing method of a filter element in which fine particles constituting a dust-collecting layer are not peeled off and high performance is maintained over a long period of time even when the filter element is scaled up. A layer of fine particles containing low melting point fine particles and small diameter fine particles is deposited and formed on the surface of a filter element material while sucking the filter element material, and the layer of the fine particles is heated by a heating means exemplified by an infrared heater and an oven to sinter the fine particles to form a dust-collecting layer.
An object of the present invention is to provide a semi-hard magnetic white powder having characteristics suitable as a security pigment, such as the magnetic powder contained in magnetic inks used for MICR. The white powder includes base particles made of a semi-hard magnetic Alnico alloy, the base particles having a titanium oxide film and a metallic silver film in this order on the surfaces thereof.
H01F 1/03 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity
B22F 1/16 - Metallic particles coated with a non-metal
B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 1/142 - Thermal or thermo-mechanical treatment
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
4233) between sulfate ions and aluminum ions in terms of aluminum oxide is 0.15 or less, and the coliform removal ratio is 83% or more. By virtue of mixing polyferric sulfate and polyaluminum chloride and using same in combination, this metal salt aggregating agent exhibits higher storage stability and aggregating performance compared with the case where polyferric sulfate and polyaluminum chloride are individually used, and this metal salt aggregating agent can also be applied to a wide range of treatment waste liquids having various characteristics. This metal salt aggregating agent also has a coliform removal action.
Provided are cobalt ferrite particles having a uniform particle size with a µm-scale average particle size. The method for producing cobalt ferrite particles involves heat treatment of an aqueous solution (ferrite precursor) containing a divalent iron salt and a divalent cobalt salt stabilized by a complexing agent.
The purpose of the present invention is to provide a semi-hard magnetic white powder having properties suitable for use as a security pigment, such as a magnetic powder contained in magnetic ink used in MICR. Provided is a white powder having a titanium oxide film and a silver metal film disposed, in this order, on the surface of base particles formed from an alnico alloy that is a semi-hard magnet.
B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
H01F 1/03 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity
B22F 1/142 - Thermal or thermo-mechanical treatment
B22F 1/16 - Metallic particles coated with a non-metal
7.
METHOD FOR PRODUCING LOW-ARSENIC COPPER CONCENTRATE
When copper concentrate is to be produced through ore floatation for separating copper minerals and arsenic minerals by using an oxidizer and a sulfur oxoacid, the present invention reduces arsenic in the copper concentrate by using a simple method. According to the present invention, when copper concentrate is to be produced through ore floatation using arsenic-containing copper ore as a material, a sulfur oxoacid and hydrogen peroxide serving as an oxidizer are used in combination as additive chemical agents in the stated order.
Provided are cobalt ferrite particles having a micrometer-order average particle diameter and similar particle diameters. When a cobalt ferrite precursor is treated at a high temperature and a high pressure, an oxidation reaction is caused in the presence of a complexing agent, thereby obtaining intended cobalt ferrite magnetic particles.
Provided are magnetic particles (cobalt ferrite) having a micrometer-order average particle diameter and similar particle diameters. A cobalt ferrite precursor is heated in the presence of a sulfite, thereby obtaining intended cobalt ferrite magnetic particles.
C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
H01F 1/11 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
Provided is a coating solution for forming a dust collecting layer, wherein the coating solution can be applied uniformly, and the formed dust collecting layer does not easily peel off from a filter element material, and allows to collect fine powder products having a small particle size. The coating solution is for forming a dust collecting layer in a dust collecting filter, and contains a fine powder, dopamine hydrochloride, and an adhesive.
B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01J 20/10 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
11.
HIGH-CONCENTRATION IRON-BASED FLOCCULANT AND METHOD FOR PRODUCING SAME
A method for producing polyferric sulfate, the method comprising adding a ferric oxide powder and a sulfuric acid solution into a sealed container, substituting the gas phase in the sealed container with oxygen, and causing an oxidation reaction to occur in a high-temperature, high-pressure condition. Provided is a method for efficiently producing, in a short period of time under a high-temperature, high-pressure condition, a polyferric sulfate solution having a high total-iron concentration and a high sludge flocculation ability, by using a ferric oxide as an iron-based material.
Provided are cobalt ferrite particles having particle sizes that are less variable and that average in the micrometer order. By performing an oxidation reaction in the presence of a complexing agent when a high-temperature high-pressure treatment is to be performed on a cobalt ferrite precursor, cobalt ferrite magnetic particles, which are the objective, are obtained.
H01F 1/11 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
15.
METHOD FOR PRODUCING COBALT FERRITE PARTICLES AND COBALT FERRITE PARTICLES PRODUCED BY SAME
Provided are magnetic particles (cobalt ferrite) having a uniform particle size with a µm-scale average particle size. Desired cobalt ferrite particles are obtained by subjecting a cobalt ferrite precursor to a heating treatment in the presence of a sulfite salt.
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is a coating solution for forming a dust collection layer, wherein the coating solution can be uniformly applied and can form a dust collection layer which is not easily peeled off from a filter element material and is capable of collecting fine powder products having a small particle size. The coating solution is for forming a dust collection layer in a dust collection filter, and contains a fine powder, dopamine hydrochloride, and an adhesive.
Provided is a coating solution for forming a dust collection layer, wherein the coating solution can be uniformly applied and can form a dust collection layer which is not easily peeled off from a filter element material and is capable of collecting fine powder products having a small particle size. The coating solution is for forming a dust collection layer in a dust collection filter, and contains a fine powder, dopamine hydrochloride, and an adhesive.
The present invention provides a method for producing lithium carbonate, that can shorten the time required in the production of lithium carbonate and has excellent maintenance property and production efficiency without forming fixed matters that require complicated procedures to remove in a reaction apparatus.
The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.
The present invention relates to a method for producing lithium carbonate, the method including: mixing ammonia and carbon dioxide gas (carbonate gas) with an aqueous solution containing lithium chloride to conduct a carbonation reaction; and thereafter, recovering a produced solid by solid-liquid separation, and also relates to a method for producing high purity lithium carbonate.
Provided is a barrier installation assembly for belt conveyors or the like which employ no hook portion to hang barriers. The barrier installation assembly requires only very simplified steps to install a barrier even at a place with an outer shape that is too complicated to have a hook portion. The barrier installation assembly (16) has a body portion (17) to be attached to a machine frame (9b); a first face plate (28) to be attached to and detached from the body portion (17); and a restrictive member (31) for restricting the displacement of the first face plate (28). The body portion (17) has an engagement portion (18) to be secured to the machine frame (9b) with a bolt (26); a second face plate (19a, 19b) integrated with the engagement portion (18); and a projected portion (21) protruded from the second face plate. The projected portion (21) can pass through a mesh space (14) of the barrier (11). The restrictive member (31) is rotatably coupled to the projected portion (21). The first face plate (28) sandwiches the barrier (11) in cooperation with the second face plate (19a, 19b). In a rotated state (as indicated with the chain double-dashed lines), the restrictive member (31) pushes the first face plate (28) against the second face plate (19a, 19b).
Disclosed are tube-shaped hollow particles which are characterized by having an average longer diameter (length) of 200 to 1000 nm inclusive, an average outer diameter of shorter diameters of 30 to 100 nm inclusive, and an average inner diameter of the shorter diameters of 29 to 99 nm inclusive. Also disclosed is a process for producing the tube-shaped hollow particles, which is characterized by comprising reacting an aqueous solution or suspension containing phosphoric acid with an aqueous solution or suspension containing a calcium compound. The tube-shaped hollow particles have nano-sized cross-section diameters, and are therefore expected to be used as a functional material such as a biomaterial, a filler for chromatography or a fluorescent material.
A method of treating hydrogen sulfide or producing hydrogen which comprises disposing a liquid tank having a photocatalyst electrode comprising a photocatalyst and a liquid tank having a metal electrode so that the two liquid tanks are separated from each other by a cation-exchange membrane, placing a liquid containing either hydrogen sulfide or an organic substance in the liquid tank having the photocatalyst electrode, electrically connecting the photocatalyst electrode to the metal electrode, and exposing the photocatalyst to a light. The liquid to be placed in the liquid tank having the metal electrode preferably is an acidic solution. The photocatalyst preferably comprises a metal sulfide, and preferably is fine particles having a layered nanocapsule structure.
In a corrosion protective coating and a corrosion protective coating material, insulating properties of empty particles in a cubic form formed of a silica shell having an outer diameter in the range of 10 nm to 300 nm are utilized to avoid the penetration of water into closed cells and to realize excellent corrosion resistance even when the thickness of the coating film is reduced to not more than 20 쎽m. In a corrosion protective coating test specimen (1), an oxide film present on the surface of an aluminum plate (2) having a length of 150 mm, a width of 70 mm, and a thickness of 5 mm is removed by sand blasting. A corrosion protective coating material comprising empty particles (4) in a cubic form formed of a silica shell having an average particle diameter of 80 nm and having an outer diameter in the range of 50 nm to 100 nm, and zinc powder particles (5) homogeneously dispersed in an isocyanate-acrylic coating material is spray coated onto the aluminum plate (2), and the coating is then baked and dried to homogeneously disperse the empty particles (4) and the zinc powder particles (5) in a coating film (6) and thus to form a corrosion protective coating (3). The specific permittivity of the corrosion protective coating (3) is satisfactorily low and 2.5, and, in a CASS test, the corrosion protective coating test specimen (1) does not cause any abnormal phenomenon even when 240 hr has elapsed.
C09D 201/00 - Coating compositions based on unspecified macromolecular compounds
B05D 5/00 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
B05D 7/24 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
B41M 5/00 - Duplicating or marking methodsSheet materials for use therein
B41M 5/50 - Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
The invention provides high-purity gypsum which has an unprecedented special and unique flaky shape and is reduced particularly in the content of arsenic and heavy metals; and a process by which the gypsum can be efficiently produced even from flue-gas gypsum having a high impurity content. The high-purity gypsum is one having a length of 20 to 150&mgr;m, a breadth of 10 to 50&mgr;m, a thickness of 0.5 to 2&mgr;m, a length/breadth ratio of 1 to 10, and a length/thickness ratio (aspect ratio) of 10 to 100 and it can be produced by subjecting a gypsum solution in the state of a degree of supersaturation of 0.15mol/L or above to rapid crystallization. In the production, it is preferable that a heated gypsum solution be used as the starting gypsum solution and the rapid crystallization is carried out preferably by cooling the heated gypsum solution by allowing to stand until the degree of supersaturation reaches 0.15mol/L or above and then stirring the resulting cooled gypsum solution.
A gas excitation device includes at least a pair of electrodes connected to an AC power in a housing having an inlet opening for a gas to be treated and an outlet opening for a gas which has been treated. One (a first electrode) of the pair of electrodes is a bridged electrode arranged by using a tension at a predetermined position in the housing. The other (a second electrode) of the pair of electrodes is a buried electrode arranged at a predetermined position with its end portion buried in the holding wall of the housing. The electrode portion of the buried electrode has a linear or planar discharge unit, and the electrode portion of the bridged electrode opposing to the electrode portion of the buried electrode has a discharge unit which periodically approaches the electrode portion of the buried electrode.
Disclosed is a technique which enables to decompose hydrogen sulfide and produce hydrogen with high efficiency by using a photocatalyst. Specifically disclosed are a method for processing hydrogen sulfide and a method for producing hydrogen wherein a liquid bath having a photocatalyst electrode (1) which is composed of at least a photocatalyst and another liquid bath having a metal electrode (2) is separated by a cation-exchange membrane (3), a liquid containing hydrogen sulfide or an organic matter is contained in the liquid bath having the photocatalyst electrode (1), the photocatalyst electrode (1) and the metal electrode (2) are electrically connected with each other, and the photocatalyst is exposed to light. An acidic solution is preferably contained in the liquid bath having the metal electrode (2), and the photocatalyst is preferably formed as a fine particle having a lamellar nanocapsule structure and preferably contains a metal sulfide. A reactor may be an electrolysis cell (11) in which a photoelectrochemical cell (34) is contained.
Optically coherent multilayered film-coated powder having weather resistance and a clear intended color, and processes for designing and producing the same are provided. A substance of the base particles providing an intended function and an intended color are selected; a spectral intensity curve and values in CIELAB color system of the intended color are measured; and with substances capable of being used as the coated layers and refractive indexes thereof being included in factors, substances and thicknesses of the coated layers and an order of formation of the layers are obtained that provide optically coherent multilayered film-coated powder having such values in CIELAB color system that minimizes a color difference and makes a hue ratio proximate to 1, by solving numerical solutions of the recurring formula for film multiple coherence.
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