Abstract:
A method of manufacturing high-quality naphthenic base oils comprising a high aromatic content and a large amount of impurities with a boiling point higher than that of gasoline. High-quality naphthenic base oil may be manufactured from light cycle oil (LCO) and slurry oil (SLO), which are inexpensive, and have a high aromatic content, a large amount of impurities, and which are effluents of a fluidized catalytic cracking (FCC) unit. The method also relates to the pretreatment process of a feedstock, where the amounts of impurities (sulfur, nitrogen, polynuclear aromatic compounds and various metals components) in the feedstock are reduced.
Abstract:
Disclosed is a cleaner, which has an improved channel conversion structure. The cleaner includes a first suction channel and a second suction channel, which are selectively opened and closed, and suck external foreign substances, and a first valve and a second valve, which are respectively rotated from the upstream portion of a flow to the downstream portion of the flow and thus close the first channel and the second channel.
Abstract:
Disclosed herein is a method of producing an optically active thiophene-based compound using a simulated moving bed adsorption separation process, and more specifically, a method of continuously separating a racemic thiophene-based compound into its optically active thiophene-based compounds having high purity, through optical resolution using the simulated moving bed process. According to the method of the current invention, a racemic mixture of a thiophene-based compound can be continuously separated into its optically active thiophene-based compounds having high purity, which is an intermediate of optically active dorzolamide acting as a topical therapeutic agent for glaucoma, using a simulated moving bed adsorption separation technique, thereby increasing industrial usability.
Abstract:
Disclosed herein is an air conditioner in which the structure of an outlet port is improved to prevent dew condensation at the outlet port. The air conditioner includes an outlet port to discharge air and a guide forming a discharge channel to guide air to the outlet port side. The guide is formed in a step shape to expand the discharge channel. The air conditioner has the effect of preventing dew condensation at the outlet port.
Abstract:
A cooking apparatus having a grill part to cook food thereon, and a grill housing coupled with the grill part, the cooking apparatus includes an electric heater provided in a middle region of the grill housing to be disposed at a lower side of the grill part, and a grill reflecting member reflecting heat generated from the electric heater to the grill part. The cooking apparatus enhances a cooking efficiency so that heat generated from an electric heater is efficiently transmitted to food.
Abstract:
A refrigerator having a main body, and a compressor and an evaporator in the main body, comprises a heat pipe forming a closed loop so as to allow the refrigerant to be circulated therein; a first heat exchanger provided in the heat pipe, absorbing heat generated from the compressor; a second heat exchanger provided in an upper part between the heat pipe and the first heat exchanger adjacent to the evaporator, discharging heat into the evaporator; and a control valve positioned between the first and second heat exchangers, opening and closing the heat pipe, wherein the refrigerant cooled and liquified in the second heat exchanger forces out the refrigerant heated and gasified in the first heat exchanger by gravity, when the control valve is opened.
Abstract:
A cleaning system includes a robot cleaner having an opening unit and a first dirt container funneled to the opening unit, and a maintenance station to which robot cleaner is docked to discharge dirt stored in the first dirt container. The maintenance station includes a first inlet hole configured to intake dirt from the first dirt container through the opening unit, a first outlet hole configured to blow air into the first dirt container, a circulating passage provided between the first inlet hole and the first outlet hole, a second dirt container disposed on the circulation passage to store dirt taken in from the robot cleaner, a draft apparatus having a draft fan and a fan motor to drive the draft fan to circulate air through the circulating passage, and a second outlet hole configured to discharge air inside the circulating passage of the maintenance station to an outside.
Abstract:
An autonomous cleaning apparatus including a body, a brush unit which is rotatably installed onto the body to collect dust from a bottom of the body, and a brush cleaning member including a first brush cleaning protrusion and a second brush cleaning protrusion that protrude toward the brush unit to make contact with the brush unit to remove foreign substances wound around the brush unit.
Abstract:
Disclosed herein is a method of producing an optically active thiophene-based compound using a simulated moving bed adsorption separation process, and more specifically, a method of continuously separating a racemic thiophene-based compound into its optically active thiophene-based compounds having high purity, through optical resolution using the simulated moving bed process. According to the method of the current invention, a racemic mixture of a thiophene-based compound can be continuously separated into its optically active thiophene-based compounds having high purity, which is an intermediate of optically active dorzolamide acting as a topical therapeutic agent for glaucoma, using a simulated moving bed adsorption separation technique, thereby increasing industrial usability.
Abstract:
An oil separator for an air conditioner includes a cylindrical housing; a refrigerant discharge pipe communicating with the housing for discharging refrigerant gas; an oil discharge pipe for circulating oil collected in the lower portion of the housing; and a refrigerant inflow pipe having one end facing the inner surface of a side wall of the housing in the tangential direction for supplying a refrigerant-oil mixture to the inside of the housing. An insertion hole, into which the refrigerant inflow pipe is inserted, is easily formed, the efficiency of the oil separator is increased, and noise and vibration generated from the oil separator is reduced.