45results about How to "Prepared economically" patented technology

The present invention relates to a method of preparing a positive active material for a rechargeable lithium battery, a positive active material prepared according to the method, and a rechargeable lithium battery including the same. This manufacturing method includes preparing a complex salt solution by mixing a solution including a metal source material and a chelating agent, disposing the complex salt on the surface of a lithium-included compound by adding a lithium-included compound to the complex salt solution, adding a solution including a fluorine source material to the solution including a lithium-included compound with the complex salt on the surface, and heat-treating the mixture. The present invention provides a simple method of economically preparing a positive active material in which structural transition on the surface is prevented and securing a uniform coating layer. In addition, the positive active material can have improved charge and discharge characteristics, cycle life characteristic, and rate characteristic. It also has improved ion conductivity, and accordingly can improve mobility of lithium ions in an electrolyte and thereby improve discharge potential of a battery. Furthermore, the positive active material can decrease the amount of a conductive material and increase density of a substrate.

Curable addition crosslinkable organopolysiloxane materials employing a platinum catalyst selected from the group consisting of compounds of the formulaand / or oligomeric or polymeric compounds which are composed of structural units of the general formulaand optionally structural units of the general formulain whichR2, R3, R4, R6, R7, R8, R9, r, s and t have the meanings stated in claim 1, may be prepared as one-component formulations having prolonged shelf life, or as two-component formulations having prolonged pot life, while maintaining desirable chemical and physical properties.

This method relates to making a joint compound that includes predispersing a dedusting agent in water to make a predispersed dedusting agent. Dry components, including at least one filler, are combined to make a dry mixture. Process water is pumped into a vessel and the predispersed dedusting agent is introduced to the vessel. The dry mixture is then added to the vessel and all components are blended to make a homogeneous product.

A single crystal quartz thin film having a thickness of 5 nm to 50 .mu.m can be prepared by forming the thin film on a single crystal substrate by a sol-gel process and peeling the thin film from the substrate. The present invention can provide the single crystal quartz thin film at a low price without a large and complex apparatus.

Slurry coating process for selectively enriching surface regions of a metal-based substrate, for example, the under-platform regions of a turbine blade, with chromium. The process employs a slurry coating composition containing metallic chromium, optionally metallic aluminum in a lesser amount by weight than chromium, and optionally other constituents. The composition further includes colloidal silica, and may also include one or more additional constituents, though in any event the composition is substantially free of hexavalent chromium and sources thereof. The coating composition is applied to a surface region to form a slurry coating, which is then heated to remove any volatile components of the coating composition and thereafter cause diffusion of chromium from the coating into the surface region to form a chromium-rich diffusion coating.

The invention relates to a versatile process for preparing composite powders that can be used as novel electrostatic charge control agents, dry or liquid toners, and specialty imaging materials. The process involves impregnating specific sized, porous, inorganic core particles with chemical compositions that include one or more polymers or waxes and at least one additional chemical chosen from dyes, pigments, carbon black, inorganic chemicals or organic chemicals. The impregnated core may optionally be coated with additional components to produce a core / shell structure.

In an end pumped or axially pumped solid state laser using a laser diode as a pumping light source, the laser crystal comprises a plurality of individual laser crystals arranged along an axial direction that have progressive higher concentrations of rare earth irons toward the output end. By thus arranging the individual laser crystals containing varying concentrations of rare earth ions, the absorption of laser for each length can be made uniform so that the tolerance for a high power pumping light is increased, and the laser output can be maximized without damaging the laser crystal.

Slurry coating composition for selectively enriching surface regions of a metal-based substrate, for example, the under-platform regions of a turbine blade, with chromium. The slurry coating composition contains metallic chromium, optionally metallic aluminum in a lesser amount by weight than chromium, and optionally other constituents. The composition further includes colloidal silica, and may also include one or more additional constituents, though in any event the composition is substantially free of hexavalent chromium and sources thereof. The coating composition can be used in a process that entails applying the coating composition to a surface region to form a slurry coating, and then heating the coating to remove any volatile components of the coating composition and thereafter cause diffusion of chromium from the coating into the surface region to form a chromium-rich diffusion coating.

The present invention provides a process for the preparation of a polyaniline salt by polymerizing an aromatic amine in the presence of a protonic acid and a mixture of aqueous and hydrocarbon solvents to obtain polyaniline salt dissolved in organic phase or in powder form.

The present disclosure relates to a graphene paper which reduced graphene oxide layers and coating layers are stacked in sequence. The graphene paper prepared according to a preparation method of the present invention has excellent electrical conductivity and mechanical properties, and can be economically prepared in large-sized graphene paper, therefore may be efficiently applied to various electrical devices such as thin-film electrodes, flexible electrodes, super capacitors, semiconductor insulating layer reinforcements and TFT semiconductor layer-electrodes, and the like.

The present invention relates to a method for preparing an ultrahigh-purity silicon carbide powder, more particularly to a method for preparing an ultrahigh-purity silicon carbide granular powder by preparing a gel wherein a silicon compound and a carbon compound are uniformly dispersed via a sol-gel process using a liquid state silicon compound and a solid or liquid state carbon compound of varying purities as raw materials, preparing a silicon dioxide-carbon (SiO2—C) composite by pyrolyzing the prepared gel, preparing a silicon carbide-silicon dioxide-carbon (SiC—SiO2—C) composite powder via two-step carbothermal reduction of the prepared silicon dioxide-carbon composite, adding a silicon metal and then conducting carbonization and carbothermal reduction at the same time by heat treating, thereby growing the synthesized silicon carbide particle with an increased yield of the silicon carbide.

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.

The present invention provides a process for the preparation of a polyaniline salt by polymerizing an aromatic amine in the presence of a protonic acid and a mixture of aqueous and hydrocarbon solvents to obtain polyaniline salt dissolved in organic phase or in powder form.

The present invention relates to a nanoparticle of oxaliplatin, which is a water-soluble active substance, a pharmaceutical composition containing the same, and a method for preparing an orally administrable oxaliplatin nanoparticle by emulsifying a lipid mixture solution wherein a solid lipid and a surfactant are mixed in an aqueous mixture solution wherein oxaliplatin and a specific cosolvent are mixed and then removing the solid lipid and the cosolvent using a supercritical fluid gas.By providing oxaliplatin, which is currently available only in injection form for parenteral administration, in the form of a nanoparticle, the present invention allows for the development of orally administrable oxaliplatin which is stable against gastric acid and has improved bioavailability, thereby improving patient compliance through avoiding the inconvenience of injection and greatly reducing medical cost. Since the oxaliplatin nanoparticle can be prepared economically using a relatively inexpensive supercritical fluid producing facility, it can be prepared via a simple process with high yield in commercial scale.

This invention relates to a surface modified silica by an alkyl sulfonated tetrazole compound, a preparation method thereof, and a resin composition containing the same. The silica according to this invention can exhibit superior adhesion to a metal.

Disclosed is an alcohol mixture that comprises a product of fermentation that is treated with calcium under conditions suitable to precipitate sulfurous proteinaceous material. The invention also provides a method of producing a blended fermented beverage from a calcium-precipitated fermented beverage and a starch hydrolyzate fermented beverage. The calcium-precipitated fermented beverage or blended beverage may be further treated to decolor the beverage (such as via activated carbon treatment) and, if desired, further treated to reduce the level of other undesirable components.

Vulcanizates produced by crosslinking of mixtures including alpha-functional polysiloxanes have high relative permittivities at high electric breakdown strengths which renders them suitable as a dielectric material for applications in actuators, generators or sensors in robotics, orthopedics, electrically controllable “artificial muscles,” and transducers producing electricity from kinetic energy.

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based on the total degree of substitution.

Disclosed is a method of preparing isobutene in which high-purity isobutene is separated (prepared) from a C4 mixture by cracking glycol ether prepared from a C4 mixture (in particular, C4 raffinate-1) containing isobutene and a glycol. The method includes cracking glycol ether into isobutene and glycol at a temperature between 50° C. and 300° C. in the presence of a strongly acidic catalyst. The glycol ether may be prepared by reaction between a C4 mixture containing isobutene and glycol in the presence of an acid catalyst.