Abstract: Disclosed is a hydroformylation method having improved catalyst stability in a reaction. Advantageously, provided is a hydroformylation method in which a specific ?,?-unsaturated carbonyl compound is incorporated during a hydroformylation reaction to prevent alkyl phosphite decomposed from a phosphite ligand from acting as a catalyst poison, thereby improving a yield of reaction and inhibiting decomposition of ligand and catalyst.

Abstract: The present invention relates to an apparatus for producing alcohols from olefins, comprising: a hydroformylation reactor wherein aldehydes are produced from olefins; a catalyst/aldehydes separator; a hydrogenation reactor wherein the aldehydes are hydrogenated to produce alcohols; and a distillation column. The hydroformylation reactor is equipped with a distributor plate, which has a broad contact surface for providing sufficient reaction area for reactants such as olefins and synthesis gas, and allows the reaction mixture to circulate and mix sufficiently, which contribute to excellent efficiency in terms of production of aldehydes. In addition, the hydrogenation reactor suppresses sub-reactions to improve the production yield of alcohols.

Abstract: The present invention relates to an apparatus for producing alcohols from olefins, comprising: a hydroformylation reactor wherein aldehydes are produced from olefins; a catalyst/aldehydes separator; a hydrogenation reactor wherein the aldehydes are hydrogenated to produce alcohols; and a distillation column. The hydroformylation reactor is equipped with a distributor plate, which has a broad contact surface for providing sufficient reaction area for reactants such as olefins and synthesis gas, and allows the reaction mixture to circulate and mix sufficiently, which contribute to excellent efficiency in terms of production of aldehydes. In addition, the hydrogenation reactor suppresses sub-reactions to improve the production yield of alcohols.

Abstract: The present invention relates to an apparatus for coproducting iso-type reaction product and alcohol from olefin, and a method for coproducting using the apparatus, in which the hydroformylation reactor provides a sufficient reaction area due to the broad contact surface area between the olefin and the synthesis gases that are the raw materials by a distributor plate installed in the reactor, and the raw materials can be sufficiently mixed with the reaction mixture due to the circulation of the reaction mixture so that the efficiency of the production of the aldehyde is excellent; and also the hydrogenation reactor suppresses the side reaction so that the efficiency for producing aldehyde and alcohol are all increased, and also iso-type reaction product and alcohol can be efficiently co-produced.

Abstract: Disclosed is a method for regenerating a hydrogenation catalyst. More specifically, disclosed is a method for regenerating a hydrogenation catalyst poisoned during hydrogenation of a hydroformylation product for preparation of alcohol by stopping hydrogenation in a hydrogenation stationary phase reactor in which the hydrogenation catalyst is set and flowing hydrogen gas under a high temperature normal pressure. The method has an effect in that the poisoned hydrogenation catalyst can be efficiently recovered through a simple process.

Abstract: Disclosed is a method for producing 1,3-butadiene through oxidative dehydrogenation of normal-butene using a parallel reactor in which catalysts are charged into fixed bed reactors and are not physically mixed. More specifically, disclosed is a method for efficiently producing 1,3-butadiene through oxidative dehydrogenation of normal-butene using the parallel reactor containing multi-component bismuth molybdate-based catalysts exhibiting different activities to oxidative dehydrogenation for normal-butene isomers (1-butene, trans-2-butene and cis-2-butene), and butene separated from a C4 mixture containing normal-butene and normal-butane, as a reactant.

Abstract: A sealing member unit may include a fixation portion that has a clip formed at one side thereof to be fixed on a vehicle body; and an elastic change portion of which one side thereof joins the one side of the fixation portion wherein the elastic change portion includes a central portion that is hollow in a length direction of the elastic change portion.

Abstract: The present invention relates to a catalyst composition for hydroformylation and a method for preparing aldehydes using the same, wherein the catalyst composition for hydroformylation comprises: a triaryl phosphine ligand; a phosphine oxide or phosphine sulfide ligand having a specific chemical formula; and a transition metal catalyst. The catalyst composition provides high catalyst activity and stability and selectivity to normal aldehydes when used in the hydroformylation for preparing aldehydes from olefins.

Abstract: An image compensating apparatus includes an input unit to receive input of an photo image, a Gaussian filtering unit to perform Gaussian filtering on the photo image, a division-map generating unit to convert the photo image on which the Gaussian filtering is performed into a color space including a plurality of color components and then generating a chromaticity division-map based on a color coordinate value in the color space, a calculating unit to calculate average chromaticity of each respective region by using the chromaticity division-map, and a compensating unit to compensate chromaticity of each respective region of the photo image by using the average chromaticity of each respective region. Accordingly, a faded image input to the input unit may effectively be compensated.

Abstract: A color conversion method includes determining a race by recognizing a skin region in an input image, selecting a preferred skin color to apply to the skin region based on a plurality of preferred skin color information preset per race, and correcting a color of the skin region using the selected preferred skin color. Additionally, a color conversation apparatus includes a control unit to determine a race by recognizing a skin region in an input image input, and to select a preferred skin color to apply to the skin region, based on the plurality of the preferred skin color information stored in a storage unit, and a compensation unit to correct a color of the skin region using the preferred skin color selected by the control unit. Hence, the skin color per race can be adequately converted to the color which can satisfy the user.

Abstract: The present invention relates to an apparatus for producing alcohols from olefins, comprising: a hydroformylation reactor wherein aldehydes are produced from olefins; a catalyst/aldehydes separator; a hydrogenation reactor wherein the aldehydes are hydrogenated to produce alcohols; and a distillation column. The hydroformylation reactor is equipped with a distributor plate, which has a broad contact surface for providing sufficient reaction area for reactants such as olefins and synthesis gas, and allows the reaction mixture to circulate and mix sufficiently, which contribute to excellent efficiency in terms of production of aldehydes. In addition, the hydrogenation reactor suppresses sub-reactions to improve the production yield of alcohols.

Abstract: The present invention relates to a catalyst composition for hydroformylation and a method for preparing aldehydes using the same, wherein the catalyst composition for hydroformylation comprises: a triaryl phosphine ligand; a phosphine oxide or phosphine sulfide ligand having a specific chemical formula; and a transition metal catalyst. The catalyst composition provides high catalyst activity and stability and selectivity to normal aldehydes when used in the hydroformylation for preparing aldehydes from olefins.

Abstract: The present invention relates to a method for preparing aldehydes by reacting olefins with a synthesis gas including carbon monoxide and hydrogen, and to an apparatus therefore. More particularly, the present invention relates to a method for preparing aldehydes, characterized by spraying and supplying olefins, synthesis gas including carbon monoxide and hydrogen, and a catalyst composition into an oxo reactor through a nozzle, and to an apparatus therefore. According to the present invention, the hydroformylation efficiency can be improved, thereby obtaining desirable aldehydes with a high yield.

Abstract: The present invention relates to a method for preparing aldehydes by reacting olefins with a synthesis gas including carbon monoxide and hydrogen, and to an apparatus therefore. More particularly, the present invention relates to a method for preparing aldehydes, characterized by spraying and supplying olefins, synthesis gas including carbon monoxide and hydrogen, and a catalyst composition into an oxo reactor through a nozzle, and to an apparatus therefore. According to the present invention, the hydroformylation efficiency can be improved, thereby obtaining desirable aldehydes with a high yield.

Abstract: The present invention relates to a method for preparing aldehydes by reacting olefins with a synthesis gas including carbon monoxide and hydrogen, and to an apparatus therefore. More particularly, the present invention relates to a method for preparing aldehydes, characterized by spraying and supplying olefins, synthesis gas including carbon monoxide and hydrogen, and a catalyst composition into an oxo reactor through a nozzle, and to an apparatus therefore. According to the present invention, the hydroformylation efficiency can be improved, thereby obtaining desirable aldehydes with a high yield.

Abstract: The present invention provides a method of preparing organic acids from aldehyde compounds by means of liquid phase oxidation which converts an aldehyde group of a compound harboring one or more aldehyde groups into a carboxyl group by using an ionic liquid as a reaction solvent or a reaction catalyst. According to the present invention, the ionic liquid is less volatile even at high temperature and stable against heat, enhancing conversion rate and selectivity and further increasing yield. In addition, the ionic liquid can be easily separated and recycled from the reactant and product.

Abstract: The disclosure is directed to a cyclone dust collector for separating air from dusts by way of a centrifugal force and, more particularly, to a novel canister type vacuum cleaner capable of using a dual cyclone dust collector with maximized allowable dust capacity. The entire structure of the vacuum cleaner as suggested herein is configured for the user's simple manipulation in discarding various foreign matters collected in the vacuum cleaner, thereby improving reliability to the user.

Abstract: A novel Trichosporonoides madida CJ-NT1 microorganism which is capable of converting fermentable sugars to a high titre of erythritol under low aeration conditions and a method of producing erythritol by fermentation of sugar, which comprises culturing the cells of the Trichosporonoides madida CJ-NT1 strain are provided.

Abstract: A novel Trichosporonoides madida CJ-NT1 microorganism which is capable of converting fermentable sugars to a high titre of erythritol under low aeration conditions and a method of producing erythritol by fermentation of sugar, which comprises culturing the cells of the Trichosporonoides madida CJ-NT1 strain are provided.