Abstract: The present invention relates to a carbon-based precious metal-transition metal composite catalyst and a preparation method therefor, and more particularly, to a catalyst synthesis method in which, when preparing a high-content precious metal-transition metal composite catalyst, a catalyst having uniform particles and composition can be prepared, and cyclohexane dimethanol (CHDM) is efficiently produced by the hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) in an aqueous solution.

Abstract: An olefin-based polymer, a film prepared from the olefin-based polymer, and preparation methods for manufacturing the olefin-based polymer and the film are disclosed. The olefin-based polymer has excellent processability, and a film prepared from the olefin-based polymer, particularly, a linear low density polyethylene film has excellent mechanical strength, in particular, drop impact strength.

Abstract: Disclosed is a method for controlling the supply of solid silicon to a preliminary crucible of an ingot growth apparatus for maintaining a constant amount of molten silicon in the preliminary crucible by measuring the height of the molten silicon in the preliminary crucible.

Abstract: An ester-based plasticizer composition and uses of the ester-based plasticizer composition are disclosed. Since the synergistic effect is provided to the improvement of thermal stability such as migration resistance and loss-on-heating to contribute to the improvement of the physical properties of a molded product, and compatibility with polyvinyl chloride resin and processability are excellent, the ester-based plasticizer composition can be used to provide molded products with excellent mechanical properties as well as thermal stability.

Abstract: The present invention relates to an ester-based plasticizer composition and use thereof, wherein the composition can provide a synergistic effect in the improvement of thermal stability, such as migration resistance and heating loss, to contribute to the enhancement of properties of a molded product, and can provide a molded product with excellent thermal stability as well as mechanical properties due to excellent compatibility and processability with a polyvinyl chloride.

Abstract: The present invention relates to a semiconductive resin composition for a high voltage power cable. Specifically, the present invention relates to a semiconductive resin composition comprising a base resin in which ethylene butyl acrylates having different melting indices are mixed, carbon black, an antioxidant, and a crosslinking agent. In addition, the present invention relates to a semiconductive resin composition for a high voltage power cable, the composition having excellent scorch stability and processability and low volume resistance even at a high temperature.

Abstract: The present disclosure relates to a composite resin composition for a geocell or a coral cell. A composite resin composition according to one implementation of the present disclosure has high density and excellent mechanical properties such as tensile strength and elongation, and thus a composite resin molded product obtained therefrom can be effectively used in the manufacturing of a geocell or a coral cell.

Abstract: A hybrid catalyst composition containing a heterogeneous transition metal compound, a catalyst for olefin polymerization containing the heterogeneous transition metal compound, and a method for preparing an olefin-based polymer in which generation of a gel is suppressed using the catalyst are disclosed. The method for preparing an olefin-based polymer can provide an olefin-based polymer in which non-uniformity of the olefin-based polymer, and in particular, generation of a gel is suppressed.

Abstract: The present invention relates to a photovoltaic power generation system comprising: a plurality of PV modules; and a plurality of power generation efficiency optimization units, which are installed to correspond to the respective plurality of PV modules one-to-one, and include inverters to convert power produced from the plurality of PV modules into AC power, and thus supply the same to a power grid through an AC line.

Abstract: The present invention relates to an apparatus for setting a communication ID of an energy storage system, the apparatus comprising: a power converter for selecting one power line from among a plurality of power lines to supply power through the selected power line; and battery managers which are sequentially connected to the power converter and are operated by the power selectively supplied through the one power line selected from among the plurality of power lines, wherein the power converter may communicate with one battery manager which is operated by the supplied power from among the battery managers.

Abstract: An olefin polymer and a preparation method for manufacturing the olefin polymer are disclosed. The olefin polymer has a high melting point and a high crystallization temperature, thus having excellent heat resistance. Therefore, the olefin polymer may be utilized in spout pouches for high-temperature liquid containers, or the like. The olefin polymer may have a density of 0.9 to 0.95 g/cm3, preferably 0.91 to 0.945 g/cm3, and satisfies the following Equations 1a and 2a: 224.02×d?86.257<Tm, and ??[Equation 1a] 219.64×d?95.767<Tc.

Abstract: The present invention relates to a transition metal compound for a catalyst for olefin polymerization and to a catalyst for olefin polymerization comprising the same. Specifically, the present invention relates to a transition metal compound for an olefin polymerization catalyst in which an allyltrimethylsilane substituent is introduced into the cyclopentadienyl group and to a catalyst for olefin polymerization comprising the same.

Abstract: An ingot growth apparatus is disclosed. The ingot growth apparatus according to an embodiment of the present invention may comprise: a growth furnace having a main crucible which is disposed inside the growth furnace and in which molten silicon is held in order to grow an ingot; a susceptor formed to surround the outer surface of the main crucible and heating the main crucible; a heater formed to surround the outer surface of the susceptor and including a coil which is supplied with power to generate a magnetic field and heats the susceptor by electromagnetic induction from the magnetic field; and a heat insulation member disposed between the coil and the susceptor.

Abstract: Provided are a noble metal-transition metal complex catalyst supported on a carbon-coated silica-alumina support and a preparation method therefor, the catalyst being capable of obtaining a fast reaction rate and catalyst stability, as compared to a conventional catalyst, when cyclohexane dimethanol (CHDM) production is carried out by a cyclohexane dicarboxylic acid (CHDA) hydrogenation reaction in an aqueous solution by using a carbon-coated supported catalyst.

Abstract: The present invention relates to an olefin-based polymer, and a method for preparing the same. The olefin-based polymer according to an embodiment of the present invention has a wide molecular weight distribution and thus has excellent processability. Moreover, a relatively large number of short-chain branches are present in high molecular weight components of the olefin-based polymer, and thus the olefin-based polymer has excellent mechanical strength and heat-sealing properties.

Abstract: Disclosed is a high-temperature endoscope of an ingot growth apparatus in which impurity deposition is prevented by having a structure that increases a flow rate of an inert gas for preventing impurities from being deposited. A high-temperature endoscope preventing impurities of an ingot growth apparatus from being deposited, according to one embodiment of the present invention, may comprise: a frame extending to the inside of a chamber of the ingot growth apparatus and having a gas discharge port provided at an end portion thereof through which an inert gas is discharged; a lens installed at the center of the end portion of the frame and protected by the inert gas discharged from the gas discharge port; and a guide tube installed on an outer surface of the frame and having a guide portion extending from the end portion of the frame so as to guide the inert gas to prevent impurities from being deposited on the lens by increasing a flow rate of the inert gas.

Abstract: An olefin-based polymer and a method for preparing the olefin-based polymer are disclosed. The olefin-based polymer has excellent heat-sealing property due to the high proportion of a copolymer, which has many branches and is derived from comonomers. The olefin-based polymer has a density of 0.915 to 0.950 g/cm3, a melt index (I2.16) of 0.5 to 1.5 g/10 min as measured with a load of 2.16 kg at 190° C., and a polydispersity index (Mw/Mn) of 2 to 6.

Abstract: The present disclosure relates to a mutant microorganism in which a glycerol catabolic pathway and a 1,3-PDO biosynthetic pathway are introduced into a microorganism incapable of using glycerol as a carbon source, and a method of producing 1,3-PDO using the same. According to the present disclosure, it is possible to produce 1,3-PDO while growing a mutant microorganism having 1,3-PDO production ability by using the inexpensive raw material glycerol as a single carbon source. Thus, the present disclosure is useful for the economical production of 1,3-PDO.

Abstract: Provided is an isomerization method of cyclohexane dicarboxylic acid using zirconia or titania as an isomerization catalyst.

Abstract: An olefinic polymer and a method for preparing the olefinic polymer are disclosed. The olefinic polymer has excellent melt strength, and thus has excellent bubble stability during blown film molding. The olefinic polymer has (1) a density of 0.9 to 0.95 g/cm3; (2) a melt index (I2.16) of 0.1 to 5.0 g/10 min as measured with a load of 2.16 kg at 190° C.; (3) a ratio between a melt index (I21.6) measured with a load of 21.6 kg and a melt index (I2.16) measured with a load of 2.16 kg at 190° C. (melt flow ratio; MFR) of 20 or more; (4) a melt tension of 55 mN or more at a velocity at break of 350 mm/s; and (5) a maximum velocity at break of 550 mm/s or more.