Abstract: The invention relates to: a hybrid supported metallocene catalyst includes at least one first metallocene compound among the compounds represented by chemical formula 1, at least one second metallocene compound among the compounds represented by chemical formula 2 and a cocatalyst compound; a method for preparing an ethylene-?-olefin copolymer, comprising polymerizing olefin monomers in the presence thereof; and an ethylene-?-olefin copolymer having improved melt strength.

Abstract: The present invention relates to a method for regenerating a hydrogenation catalyst for a phthalate compound. More specifically, the present invention regenerates a hydrogenation catalyst for a phthalate compound by using an alcohol, and thereby provides a method for regenerating a hydrogenation catalyst for a phthalate compound that is capable of continuously hydrogenating a phthalate compound without replacing a catalyst in a catalytic reactor, and is also capable of improving operational stability and the lifetime of a catalyst and increasing economic efficiency.

Abstract: The present invention relates to a novel group 4 transition metal compound, a method for preparing the compound, a catalyst composition containing the compound, and a method for preparing a polyolefin, comprising a step for forming a polymerization reaction of olefin monomers in the presence of the catalyst composition. The group 4 transition metal compound of the present invention exhibits an excellent catalytic activity and has excellent thermal stability in a polyolefin synthesis reaction, and thus can be used even in a polyolefin synthesis reaction at a high temperature. In addition, the compound of the present invention can be advantageously used in the synthesis process of grade-controlled polyolefin since the weight average molecular weight of the synthesized polyolefin and the octane content in the polymer can be adjusted by varying the kinds of center metal and ligand.

Abstract: The present invention relates to a stripping method capable of recovering, by an environmentally friendly method, a high-purity ester-based compound without concern over the oxidation of an ester-based compound from a mixture containing the ester-based compound. The stripping method has advantages of generating no wastewater, enabling equipment costs to be reduced by simplifying the process, removing concern over the oxidation of an ester-based compound during the process, and enabling the reuse of the components recovered in the process.

Abstract: Provided is a method of preparing trichlorosilane, more particularly, a method of preparing trichlorosilane which trichlorosilane can be obtained with an improved yield using a catalyst-supported silicon.

Abstract: The present invention provides a polymer emulsion having heat sealability for a blister package, and a method for preparing the same. Since the polymer emulsion of the present invention includes latex particles having an average particle diameter of a nanosize and a low unimodal particle size distribution, it may exhibit uniform and stable emulsion properties, particularly excellent heat sealability, and thus may be suitably used for a blister package and on the like. Furthermore, the polymer emulsion of the present invention is polymerized in an aqueous medium without using an organic solvent, and thus enables provision of a blister package with minimized harmfulness to a human body and the environment.

Abstract: The present invention relates to a purification method and a purification apparatus for off-gas. More specifically, the present invention relates to a purification method and a purification apparatus for off-gas, capable of lowering the concentration of hydrogen chloride and separating high-purity hydrogen from the off-gas, which is discharged after performing a polysilicon deposition process by a chemical vapor deposition reaction.

Abstract: The present invention relates to a glass frit, a conductive paste composition comprising the glass frit, and a solar cell fabricated using the conductive paste composition. The glass frit of the present invention comprises SiO2, PbO, and at least one selected from the group consisting of Al2O3, ZrO2, ZnO, and Li2O. Further, the conductive paste composition of the present invention comprises a silver (Ag) powder, a lithium titanium oxide, a glass frit, a binder, and a solvent. The conductive paste composition of the present invention can be used to provide a solar cell having low contact resistance to enhance photoelectric efficiency.

Abstract: This disclosure relates to porous carbon and a method of preparing the same. The porous carbon of the present invention is derived from a carbide compound having a composition comprising metal and oxide. The porous carbon of the present invention comprises both micropores and mesopores, and has large specific surface area, and thus, may be usefully used in various fields.

Abstract: Disclosed herein is a polyvinyl chloride resin, including: a first particle group having a particle diameter of 0.01 ?m or more and less than 1 ?m; and a second particle group having a particle diameter of 1 to 10 ?m, wherein the volume ratio of the first particle group to the second particle group is 1:0.4 to 1:1.

Abstract: Provided are a preparation method of iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles, iron oxide-based nanoparticles prepared by the same, and a T1 contrast agent including the same. More particularly, the disclosure describes a method for preparation of iron oxide nanoparticles having a extremely small and uniform size of 4 nm or less based on thermal decomposition of iron oleate complex, iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles prepared by the same, and a T1 contrast agent including iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles.

Abstract: This disclosure relates to porous boron nitride and a method for preparing the same. The porous boron nitride of the present invention may be obtained by mixing a boron source with a nitrogen source, heating the mixture to form a compound, and then, extracting elements other than boron and nitrogen. The porous boron nitride of the present invention comprises both micropores and mesopoers, and it has a large specific surface area, and thus, may be usefully used in various fields.

Abstract: The present invention relates to a method for preparing uniform metal oxide nanoparticles. According to the preparation method of the present invention, it is possible to maintain the temperature and pressure inside the reactor in a stable and constant manner by removing water generated in the reaction step for forming metal oxide nanoparticles. Thus, the uniformity of nanoparticles formed is increased, and the reproducibility between batches can be increased even in a repeated process and and a large-scale reaction. Therefore, the preparation method of the present invention can be used to synthesize uniform nanoparticles reproducibly in large quantities.

Abstract: Provided are iron oxide nanocapsules for an MRI contrast agent having high contrast, in which a plurality of iron oxide nanoparticles having a hydrophobic ligand attached thereto are encapsulated in an encapsulation material including a biodegradable polymer and a surfactant, and which satisfy Relations 1, 2, 3, 4 and 5 below. Also a method of manufacturing the iron oxide nanocapsules is provided. 5?100*D?(IO)/C?(IO)??[Relation 1] 2.5?100*D?(Cap)/C?(Cap)??[Relation 2] 0.

Abstract: There are provided a graphene having an oxygen atom content in a predetermined range or less and a carbon/oxygen weight ratio in a specific range to show excellent electrical and thermal conductivity properties, and a barrier property, and a method and an apparatus for preparing the graphene having excellent electrical and thermal conductivity properties and a barrier property by using a subcritical-state fluid or a supercritical-state fluid. According to the method and the apparatus for preparing the graphene, impurities such as graphene oxide, and the like, may be effectively removed, such that uniformity of the graphene to be prepared may be increased, and therefore, the graphene which is highly applicable as materials throughout the industry may be mass-produced.

Abstract: The present invention relates to an emitter wrap-through solar cell and a method for preparing the same. The solar cell according to the present invention has a structure that may minimize generation of leakage current and minimize energy conversion efficiency measurement error. And, the preparation method of a solar cell according to the present invention may easily confirm the alignment state of the electrode, and thus, provide more improved productivity.

Abstract: Provided is a method of preparing a vinyl chloride-based resin that includes preparing slurry through suspension polymerization by mixing a monomer, an oil soluble initiator, a dispersant, and an additive including an emulsifier, a water-soluble initiator, or a combination thereof, wherein the monomer includes vinyl chloride, an unsaturated carboxylic acid-based compound, and an ethylenic unsaturated compound that is copolymerizable therewith, and the emulsifier includes an anionic emulsifier, a non-ionic emulsifier, or a combination thereof.

Abstract: Provided is a heat-dissipating paint composition using a carbon material, the heat-dissipating paint composition including a dispersion solution containing a surface treated carbon material, a heat resistance additive, and an adhesion improving emulsion, so that the heat-dissipating paint composition can have excellent heat dissipation performance and can be applied to various industrial field requiring temperature control.

Abstract: There are a method and an apparatus for modifying a graphene, and more specifically, a method and an apparatus for modifying a graphene capable of obtaining the graphene having a desired crystallite size by repeating a process for modifying the graphene using subcritical or supercritical carbon dioxide several times. According to the method and the apparatus for modifying the graphene of the present invention, the graphene having excellent electrical conductivity and dispersibility may be obtained.

Abstract: The present invention relates to a resin for a blister package and a preparation method thereof. The resin for a blister package according to the present invention is a water-soluble resin which can minimize a hazard to a human body due to residual of a solvent, and particularly, a resin layer formed by using the resin can show an excellent heat seal property and is hardly deformed at the heat seal temperature condition.