Lg Chem, Ltd

Lg Philips Lcd Co., Inc.

Korea Research Institute of Chemical Technology

Lg Display Co., Ltd.

Dongwoo Fine-chem Co., Ltd.

Hanwha Total Petrochemical Co., Ltd.

Kyoung Su Ha

Seong Pil Kang

Boo Gon Woo

Jun Seok Ko

Young Bae Kim

Seok Hwan Choi

Ki Won Jun

Yun Jo Lee

Geun Jae Kwak

Joo Young Cheon

Yong Beom Kim

Geon Yong Kim

Woong Kwon Kim

Sang Youn Lee

Dong Guk Kim

Myong Gi Jang

Gi Hwan Ahn

Min Hee Woo

Seon Hee Park

Se Won Baek

Sung Soo Park

Jong Wook Bae

Heume Il Baek

Jin Suk Lee

Ho Sik Chang

Yeon Shick Yoo

Yong Sun Han

Eun Ju Kim

Heum Il Baek

Yoo Sung Lee

Jae-Hoon Jung

Jo Yong Park

Seung-Chan Baek

Seok Kwan Choi

Min Jeong Park

Heume Ti Baek

Jeong Rang Kim

Du Eil Kim

Koo Hyun Kang

Gyu In Jung

Jae Hoon Jung

Seon Ju Park

The present invention relates to a method for producing the activated catalyst for Fischer-Tropsch synthesis comprising: a first step of reducing a catalyst for Fischer-Tropsch synthesis; a second step of preparing liquid hydrocarbon in which a part or all of molecular oxygen is eliminated; and a third step of introducing the reduced catalyst prepared in the first step into the liquid hydrocarbon prepared in the second step while blocking its contact with air. Since the reduced catalyst used for Fischer-Tropsch synthesis is introduced into liquid hydrocarbon from which molecular oxygen is removed or coated by liquid hydrocarbon, the catalyst for Fischer-Tropsch synthesis activated based on the present invention maintains a high activity even if exposed to the air for a long time, thereby easily facilitating the long-term storage and long-distance transfer of the reduced catalyst.

Storing method of activated catalysts for Fischer-Tropsch synthesis

Disclosed is a transparent electrode pattern structure including: a first transparent electrode layer and a second transparent electrode layer which are stacked on a transparent substrate in a predetermined pattern, respectively; an insulation layer disposed between the first transparent electrode layer and the second transparent electrode layer; and contact holes formed in the insulation layer to electrically connect the first transparent electrode layer with the second transparent electrode layer; wherein the first transparent electrode layer and the second transparent electrode layer have a thickness of 100 to 200 nm, respectively, and the insulation layer has a thickness of 1,000 to 2,000 nm, thereby considerably decreasing a difference in reflectance on separate positions, as well as a touch screen panel including the transparent electrode pattern structure.

Transparent electrode pattern structure and touch screen panel including the same

Disclosed is a transparent electrode laminate including: sensing electrodes including first patterns formed in a first direction, and second patterns formed in a second direction; bridge electrodes configured to electrically connected separated unit patterns of the second patterns; and an insulation layer disposed between the sensing electrodes and the bridge electrodes, wherein metal patterns are formed on the insulation layer exposed between the first pattern and the second pattern, thereby obtaining a high transparency by minimizing a difference in reflectance for each position and reducing the pattern visual recognition.

Transparent electrode laminate and touch screen panel including the same

The invention relates to a reactor system, comprising a heat-exchange unit and a reaction unit that are assembled together into a structure. The heat-exchange unit has a plurality of plate or corrugated-plate heat exchangers, and is formed so as to attachable/detachable to/from the reaction unit and insertable into the latter. Accordingly, a catalyst may be attached to a heat-transfer surface of a heat exchanger by a washcoat method or the like, thus maximizing heat-transfer efficiency and enabling the easy removal or reattachment of the catalyst when the enabling the easy removal or reattachment of the catalyst at the end of the lifespan of the catalyst.

Reactor system for producing hydrocarbons from synthetic gas

Provided is a preparation method for a mesoporous zeolite, particularly a method for preparing mesoporous zeolite through a simple process without using costly materials such as an organic amine template or a surfactant. The method includes 1) forming a synthetic zeolite gel by mixing a silica precursor, an aluminum precursor and water and aging the resulted mixture; 2) carrying out zeolite synthesis by subjecting the synthetic zeolite gel to a hydrothermal reaction; 3) cooling the synthesized zeolite from the above step 2), then adding a basic solution thereto and allowing them to react, thereby obtaining a mesoporous zeolite slurry; and 4) washing the mesoporous zeolite slurry with water, drying and firing it, thereby obtaining a mesoporous zeolite.

Method for preparation of mesoporous zeolites

Disclosed is a reaction device for producing hydrocarbons from synthesis gas, in which hydrocarbons, olefins, oxygenates, etc., are produced over a Fischer-Tropsch catalyst by using synthesis gas, so that the catalyst particles can easily be from a slurry which is discharged to the outside. That is, the present invention provides a reaction device for producing hydrocarbons from synthesis gas, in which an internal filter system for separating particles enlarged due to agglomeration phenomenon of a catalyst is installed inside the reactor, and a separating device is separately disposed outside, such that it is possible to recirculate only particles having a size appropriate for performing F-T synthesis in the slurry phase, and additionally, it is possible to effectively discharge and process a catalyst aggregated due to a combination of fine catalyst particles, the catalyst chipped off during the operation, etc., liquid hydrocarbon, resulting water, etc., in the slurry phase reactor.

Reaction device for producing hydrocarbons from synthesis gas

The present invention relates to: a catalyst activation method for Fischer-Tropsch synthesis; a catalyst regeneration method for Fischer-Tropsch synthesis; and a method for producing a liquid or solid hydrocarbon by using the Fischer-Tropsch synthesis reaction. The temperatures required for a metal carbide producing and activating reaction is markedly lower than existing catalyst activation temperatures, and the catalyst can be activated under conditions that are the same as Fischer-Tropsch synthesis reaction conditions, and thus there is no need for separate reduction equipment in the reactor, and a Fischer-Tropsch synthesis catalyst which has been used for a long time can be regenerated within the reactor without the catalyst being isolated or extracted from the reactor.

Catalyst activation method for Fischer-Tropsch synthesis

The present invention relates to a catalyst for Fischer-Tropsch synthesis which has excellent heat transfer capability. This catalyst contains (1) central core particle or particles made of a heat transfer material (HTM) selected from the group consisting of a metal, a metal oxide, a ceramic, and a mixture thereof; and (2) outer particle layer which surrounds the central core particles and is attached to the surfaces of the central core particles by a binder material layer. The outer particle layer has a support and catalyst particles in a powder form containing metal particles disposed on the support. The catalyst having such a dual particle structure shows excellent heat transfer capability and, thus, exhibits high selectivity to a target hydrocarbon. Therefore, the catalyst of the present invention is useful in a fixed-bed reactor for Fischer-Tropsch synthesis for producing hydrocarbons from synthetic gas.

Catalyst for Fischer-Tropsch synthesis having excellent heat transfer capability

Disclosed is an apparatus for recovering an acrylic acid from a mixture containing acrylic acid, acrylic acid dimer and impurities with high boiling point, including: an acrylic acid recovering device that comprises an acrylic acid distillation unit being present within an acrylic acid dimer pyrolysis tank, and is operated under reduced pressure; a separation column for removing impurities with high boiling point from the mixture which is introduced into the acrylic acid recovering device; and a line for introducing the mixture into the acrylic acid recovering device.

Apparatus for recovering acrylic acid

Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5&#x2dc;30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.

Method of producing unsaturated acid from olefin

A method of manufacturing a substrate for a liquid crystal display. The method includes forming a plurality of first line-shaped fine grooves parallel to each other in a lengthwise direction and a plurality of second line-shaped fine grooves parallel to each other in a width direction on the substrate, forming an inorganic insulating film on the substrate including the first and second line-shaped fine grooves, forming a plurality of gate lines within the first line-shaped fine grooves, forming a plurality of data lines that contacts an upper surface of the inorganic insulating film within the second line-shaped fine grooves, and forming a passivation layer on the substrate including the data lines.

Substrate for liquid crystal display

A substrate for a liquid crystal display includes: a line-shaped fine groove formed on the substrate; and a metal line at least formed within the fine groove. The substrate enables a decrease in the height difference between the metal line and the surface of the substrate, thereby enhancing reliability in manufacturing the liquid crystal display. In addition, the aperture ratio of the pixel is enhanced, brightness is enhanced, and high resolution is realized.

Disclosed is a method for producing (meth)acrylic acid comprising a process of recovering (meth)acrylic acid as aqueous (meth)acrylic acid solution from a (meth)acrylic acid-containing gas mixture produced by the catalytic gas phase oxidation of at least one reactant selected from the group consisting of propane, propylene, isobutylene and (meth)acrolein, wherein the recovering process comprises the steps of: (1) feeding the (meth)acrylic acid-containing gas mixture into a quenching tower and condensing it in the quenching tower so as to recover an aqueous (meth)acrylic acid solution from the bottom of the quenching tower, in which some of the recovered aqueous (meth)acrylic acid solution is recycled to the upper portion of the quenching tower so as to condense the (meth)acrylic acid-containing gas mixture; (2) passing the uncondensed part of the (meth)acrylic acid-containing gas mixture from the top of the quenching tower to a distillation tower; and (3) heating the bottom of the distillation tower to separate water-containing impurity components from the uncondensed (meth)acrylic acid-containing gas mixture and to discharge them from the top of the distillation tower. A system used for carrying out the method is also disclosed.

Method for producing (meth) acrylic acid

Disclosed is a simplified method for recovering acrylic acid from a mixture containing acrylic acid, acrylic acid dimer and impurities with high boiling point, in a stable and efficient manner. The method comprises the steps of: introducing the mixture into an acrylic acid recovering device comprising an acrylic distillation unit integrated with an acrylic acid dimer pyrolysis tank; carrying out decomposition of acrylic acid dimmer under reduced pressure and recovering acrylic acid. The method optionally further comprises a step of recycling a portion of the solution obtained from the bottom of the acrylic acid recovering device to the acrylic acid recovering device.

Method for recovering acrylic acid

Growing community of inventors

Daejeon, South Korea

Kyoung Su Ha