摘要:
The present invention provides a pyrolysis tube for enhancing the yield of olefins and reducing a coking tendency in steam cracking of hydrocarbons. According to the present invention, the pyrolysis tube is characterized in that a plurality of mixing blades made by twisting two ends of a plate in opposite directions are included therein. The yield of ethylene is thereby improved and the coking tendency is reduced by mixing a fluid flow, improving a heat transfer rate and shortening a residence time of the reactants therein.
摘要:
The present invention relates to a catalyst for steam cracking of hydrocarbons, which steam cracks hydrocarbons to improve a yield of olefins such as ethylene and propylene, reduces produced coke, and has superior thermal stability at a high temperature. Particularly, the present invention provides a catalyst for steam cracking of hydrocarbons comprising potassium phosphate as a catalyst component, preparation thereof, and olefin preparation by steam cracking of hydrocarbons using the same.
摘要:
The present invention relates to a catalyst for steam cracking of hydrocarbons, which steam cracks hydrocarbons to improve a yield of olefins such as ethylene and propylene, reduces produced coke, and has superior thermal stability at a high temperature. Particularly, the present invention provides a catalyst for steam cracking of hydrocarbons comprising potassium phosphate as a catalyst component, preparation thereof, and olefin preparation by steam cracking of hydrocarbons using the same.
摘要:
The present invention relates to a process for pyrolysis of hydrocarbons for olefin preparation, and particularly to a process for pyrolysis of hydrocarbons comprising pyrolyzing paraffin hydrocarbons in the presence of steam to prepare olefins, where the pyrolysis is conducted in a pyrolysis reaction tube in which a porous inorganic substance with a pore diameter of 1 μm˜5 mm, a porosity of 10˜80%, and a maximum specific surface area of 0.1 m2/g is inserted or filled. According to the present invention, in the hydrocarbon pyrolysis process, the porous inorganic substance is inserted or filled into the pyrolysis reaction tube, and thus the olefin yield can be improved compared to the conventional pyrolysis processes, a continuous operation period can be prolonged, and a life cycle of the pyrolysis reaction tube can be prolonged.
摘要:
The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of congealing aromatic dialdehyde by cooling the gas-phase reaction mixture including the aromatic dialdehyde, which is obtained by gas-phase oxidation of dimethylbenzene, to 5-70° C. and separating the congealed aromatic dialdehyde from the remaining reaction mixture. Using the method and apparatus in accordance with the present invention, aromatic dialdehyde can be effectively and selectively separated from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene in high yield.
摘要:
The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of congealing aromatic dialdehyde by cooling the gas-phase reaction mixture including the aromatic dialdehyde, which is obtained by gas-phase oxidation of dimethylbenzene, to 5-70° C. and separating the congealed aromatic dialdehyde from the remaining reaction mixture. Using the method and apparatus in accordance with the present invention, aromatic dialdehyde can be effectively and selectively separated from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene in high yield.
摘要:
The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of congealing aromatic dialdehyde by cooling the gas-phase reaction mixture including the aromatic dialdehyde, which is obtained by gas-phase oxidation of dimethylbenzene, to 5-70° C. and separating the congealed aromatic dialdehyde from the remaining reaction mixture. Using the method and apparatus in accordance with the present invention, aromatic dialdehyde can be effectively and selectively separated from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene in high yield.
摘要:
The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of congealing aromatic dialdehyde by cooling the gas-phase reaction mixture including the aromatic dialdehyde, which is obtained by gas-phase oxidation of dimethylbenzene, to 5-70° C. and separating the congealed aromatic dialdehyde from the remaining reaction mixture. Using the method and apparatus in accordance with the present invention, aromatic dialdehyde can be effectively and selectively separated from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene in high yield.
摘要:
Provided are an ion conductive resin fiber, an ion conductive hybrid membrane, a membrane electrode assembly and a fuel cell. The ion conductive resin fiber comprises an inner layer including an ion conductive resin; and an outer layer including an ion conductive resin having larger EW than the ion conductive resin of the inner layer, and surrounding the inner layer. The ion conductive resin fiber and the ion conductive hybrid membrane are excellent in ion conductivity, polar solvent stability and dimensional stability under low humidity conditions. The fuel cell manufactured using the same has advantages of stable operation and management of a system at ease, removal or reduction of components related to water management, and even in case of low relative humidity, operation at high temperature of 80° C. or higher.
摘要:
An array substrate for a transflective liquid crystal display device comprising a common electrode over a third passivation layer substantially all over a substrate, the common electrode having first openings and second openings corresponding to a transmissive area and a reflective area, respectively, wherein the first openings are spaced apart from each other and are parallel to a data line, and the second openings are spaced apart from each other and are slant at a predetermined angle with respect to the data line, wherein first ends of the first openings overlap a second gate line, second ends of the first openings overlap the common line, first ends of the second openings overlap the common line, and second ends of the second openings overlap a first gate line.