Patent application number | Description | Published |
20090105493 | PREPARATION OF IRON (II) ACETATE POWDER FROM A LOW GRADE MAGNETITE - The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. | 04-23-2009 |
20090130485 | OLIGOMER/HALLOYSITE COMPOSITE MATERIAL AND METHOD FOR PREPARING THE SAME, AND HYDROCARBON ADSORBENT USING THE SAME - There is provided a method for manufacturing oligomer/halloysite composite material including the steps of: adding halloysite powder to an oligomer solution to be mixed; heating the mixed material to expand air inside of halloysite nanotube; and filling the oligomer solution inside of the halloysite nanotube by cooling the mixed material to a room temperature. | 05-21-2009 |
20110049415 | Fabrication Method of ZNO Nano-Particle and Fabrication Method of ZNO Nano-Fluid Using Thereof - Provided are a method for preparing zinc oxide (ZnO) nanoparticles and a method for preparing ZnO nanofluid using the same. The method for preparing ZnO nanoparticles includes: a) heating deionized water; b) dissolving zinc (Zn) salt in the deionized water to prepare a precursor solution; c) adding solid alkali salt to the precursor solution to prepare a dispersion of ZnO nanoparticles; and d) separating the ZnO nanoparticles by solid-liquid separation and washing them with deionized water. Highly pure, crystalline ZnO nanoparticles with spherical shape and very narrow particle size distribution of 10 to 50 nm can be prepared quickly and at large scale and low cost using inexpensive materials via a stable low-temperature process, without using a dispersant. The associated low-temperature, normal-pressure process produces few harmful materials and may be easily employed for production of ZnO nanoparticles. | 03-03-2011 |
20110230332 | OLIGOMER/HALLOYSITE COMPOSITE MATERIAL AND METHOD FOR PREPARING THE SAME, AND HYDROCARBON ADSORBENT USING THE SAME - There is provided a method for manufacturing oligomer/halloysite composite material including the steps of: adding halloysite powder to an oligomer solution to be mixed; heating the mixed material to expand air inside of halloysite nanotube; and filling the oligomer solution inside of the halloysite nanotube by cooling the mixed material to a room temperature. | 09-22-2011 |
20110281112 | METHOD FOR PRODUCING CERIUM DIOXIDE NANOPOWDER BY FLAME SPRAY PYROLYSIS AND CERIUM DIOXIDE NANOPOWDER PRODUCED BY THE METHOD - Disclosed is a method for producing a cerium dioxide nanopowder by flame spray pyrolysis. The method comprises dissolving a cerium compound in an organic solvent to prepare a precursor solution, atomizing the precursor solution into microdroplets using an ultrasonic atomizer, transferring the microdroplets together with an argon gas as a carrier gas to a central portion of a high-temperature diffusion flame burner, subjecting the microdroplets to pyrolysis and oxidation in the central portion of the diffusion flame burner to produce a cerium dioxide nanopowder, and collecting the cerium dioxide nanopowder using a collector. According to the method, a cerium dioxide nanopowder can be continuously produced on a large scale by flame spray pyrolysis. In addition, the particle size and uniformity of the cerium dioxide nanopowder can be controlled by appropriately selecting the kind of the solvent and the concentration of the raw material. Furthermore, flame spray pyrolysis allows the cerium dioxide to have a fluorite crystal structure. | 11-17-2011 |
20120107214 | METHOD FOR PREPARING MICROTUBULAR HALLOYSITE NANOPOWDERS - The present invention provides a method for preparing microtubular halloysite nanopowders by cutting halloysite nanotubes at a high pressure, microtubular halloysite nanopowders prepared by the method, and a cosmetic composition comprising the microtubular halloysite nanopowders. According to the method of the present invention, it is possible to prepare the halloysite nanopowders with a tubular shape using natural halloysite and effectively select a halloysite nanopowder having a desired shape. The microtubular halloysite nanopowders can be used in many industrial fields and used as a container or a carrier for nanoparticles or organic materials such as drugs, air fresheners, cosmetics, agricultural chemical materials, etc. | 05-03-2012 |
20130105401 | Method for Removing Phosphorus and Nitrogen Contained in Sewage or Wastewater Using Iron Ore Wastewater | 05-02-2013 |
20130277201 | Method for Separating and Recovering Silicon from Silicon Sludge - Disclosed is a method for selectively separating and recovering silicon from waste silicon sludge generated during a semiconductor manufacturing process. With the method for separating and recovering silicon from the silicon sludge, oil components, iron, silicon carbide that are included in the silicon sludge may be removed and silicon may be selectively separated and recovered. In addition, silicon may be efficiently recovered without injection of an additive for precipitating a specific component or without a separate device such as a magnetic separator, or the like, for removing iron. | 10-24-2013 |
20140100103 | METHOD OF PRODUCING CARBIDE AND CARBON NITRIDE POWDERS CONTAINING BINDER, AND CERMET OBTAINED FROM THE SAME - Disclosed is a method of producing carbide and carbon nitride powders containing a binder, and cermet obtained from the same. | 04-10-2014 |
20140124698 | METHOD FOR PREPARING MAGNETITE NANOPARTICLES FROM LOW-GRADE IRON ORE USING SOLVENT EXTRACTION AND MAGNETITE NANOPARTICLES PREPARED BY THE SAME - The present invention relates to a method for preparing magnetite nanoparticles from low-grade iron ore using solvent extraction and magnetite nanoparticles prepared by the same. According to the method for magnetite nanoparticles from low-grade iron ore of the present invention, it is possible to prepare high-purity magnetite nanoparticles having a purity of 99% or higher by solvent extraction using low-grade iron ore as a starting material, and thus it is possible to reduce the processing cost and the amount of energy used, thus supplying a high-efficiency magnetite nanoparticle adsorbent, which can be industrially applied to wastewater treatment or desalination plant, in large quantities at low cost. In particular, it is possible to effectively treat livestock wastewater, heavy metal wastewater, oil discharged into rivers, etc. at low cost, thus significantly contributing to the prevention of environmental pollution. Moreover, the magnetite nanoparticles prepared by the present invention has a purity of 99.5% and thus can be used as raw materials for high-tech products such as nanoparticle catalysts, magnetic fluids, MRI contrast agents, etc. | 05-08-2014 |
Patent application number | Description | Published |
20080280211 | Electrolyte for Lithium Secondary Battery Comprising Chelating Agent and Lithium Secondary Battery Using the Same - Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode. | 11-13-2008 |
20100159321 | ELECTROLYTE FOR LITHIUM SECONDARY BATTERY COMPRISING CHELATING AGENT AND LITHIUM SECONDARY BATTERY USING THE SAME - Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode. | 06-24-2010 |
20100239909 | CATHODE MIX CONTAINING HAVING IMPROVED EFFICIENCY AND ENERGY DENSITY OF ELECTRODE - Provided is a cathode mix for lithium secondary batteries, comprising a cathode active material having a composition represented by the following Formula I: LiFe(P | 09-23-2010 |
20100261060 | LITHIUM IRON PHOSPHATE HAVING OLIVINE STRUCTURE AND METHOD FOR ANALYZING THE SAME - Provided is an olivine-type lithium iron phosphate having a composition represented by Formula I, comprising 0.1 to 5% by weight of Li | 10-14-2010 |
20110089367 | PRECURSOR FOR PREPARATION OF LITHIUM TRANSITION METAL OXIDE - Provided is a precursor for the preparation of a lithium transition metal oxide that is used for the preparation of a lithium transition metal oxide as a cathode active material for a lithium secondary battery, through a reaction with a lithium-containing compound, wherein the precursor contains two or more transition metals, and sulfate ion (SO | 04-21-2011 |
20110140036 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Provided is a cathode active material which is lithium transition metal oxide having an α-NaFeO | 06-16-2011 |
20110287315 | CATHODE ACTIVE MATERIAL PROVIDING IMPROVED EFFICIENCY AND ENERGY DENSITY OF ELECTRODE - Provided is a cathode active material having a composition represented by the following Formula I: LiFe(P | 11-24-2011 |
20110315917 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Provided is a lithium transition metal oxide having an α-NaFeO | 12-29-2011 |
20130234064 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Provided is a lithium transition metal oxide having an α-NaFeO | 09-12-2013 |
20140299813 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Provided is a lithium transition metal oxide having an α-NaFeO | 10-09-2014 |