Abstract: The present disclosure relates to a diester-based material production unit including a reaction device in which an esterification reaction of dicarboxylic acid and a primary alcohol is performed, a column in which the gas-liquid separation of the primary alcohol and the water introduced is performed, a heat exchanger installed on a gas phase line of the column to remove heat of the gas phase line, a flash drum in which separation of a liquid phase and a gas phase is performed in the mixture stream including the primary alcohol and the water, a condenser installed on the flash drum upper line, and a layer separator in which the layer separation of a mixture of a liquefied primary alcohol and water into an organic layer and an aqueous layer is performed, wherein one or more lines through which recirculated primary alcohol from the flash drum and the layer separator flows are connected to an upper portion of the column.

Abstract: A diester-based material can be prepared continuously including a reaction part in which a total of n reaction units from a first reaction unit to an nth reaction unit are connected in series, the reaction unit including a reactor which esterifies dicarboxylic acid and alcohol, includes: esterifying dicarboxylic acid and alcohol in a reactor of the first reaction unit to produce a reaction product, and supplying a lower discharge stream including the reaction product to a reaction unit at a rear end, wherein an operating pressure of the reactor of the first reaction unit is 0.4 kg/cm2G to 5.5 kg/cm2G, an operating pressure is reduced from a reactor of any one reaction unit of reaction units from a second reaction unit to the nth reaction unit, and an operating temperature is increased from the reactor of the first reaction unit to the reactor of the nth reaction unit.

Abstract: An imaging device is provided to include a physical unclonable function (PUF) pixel selection unit configured to identify a first pixel that is designated to generate PUF data and select a second pixel having a color identical to a color of the first pixel, a noise extraction unit coupled to the PUF pixel selection unit to receive information of the first pixel and the second pixel and configured to extract a first noise value of the first pixel and a second noise value of the second pixel, and a PUF data generation unit coupled to the noise extraction unit and configured to generate the PUF data based on the first noise value and the second noise value from the noise extraction unit.

Abstract: A method for preparing neopentyl glycol, including: performing a hydrogenation reaction in a first hydrogenation reactor to obtain a first reaction product including neopentyl glycol; supplying the first reaction product to a flash drum to obtain hydrogen and a first degassed solution stream from which the hydrogen has been degassed; supplying the hydrogen to a second hydrogenation reactor; supplying the first degassed solution stream to a first heat exchanger to lower the temperature; supplying a part of the first degassed solution stream having the lowered temperature to the second hydrogenation reactor as a second branch stream; performing the hydrogenation reaction in the second hydrogenation reactor to obtain a second reaction product including neopentyl glycol; and introducing the second reaction product to a neopentyl glycol refining process to obtain neopentyl glycol.

Abstract: A method of removing a metal substance in a petrochemical product including: supplying a petrochemical product stream to an incoming tank through a supply pipe, circulating the petrochemical product stream through an incoming tank circulation pipe, and removing a metal substance included in the petrochemical product stream using a magnetic filter; transporting the petrochemical product stream to an outgoing tank through an incoming tank discharge pipe which is branched from the incoming tank circulation pipe and connected to an outgoing tank; circulating the petrochemical product stream through an outgoing tank circulation pipe provided in the outgoing tank and removing the metal substance included in the petrochemical product stream using a magnetic filter; and transporting the petrochemical product stream to a branch pipe branched from the outgoing tank circulation pipe to remove the metal substance using an ion exchange resin filter.

Abstract: A bio-paint composition and a method of preparing the same can improve the physical properties of a paint by adding acrylic resins having a new composition when the paint composition containing a biomass polyurethane which is an eco-friendly material is prepared.

Abstract: The present disclosure relates to a preparation system and a preparation method of a diester-based composition. A first alcohol which is a reaction raw material is added to waste water as an extracting agent, and layer separation is performed to separate a second alcohol which is another reaction raw material in the waste water. Accordingly, the amount of alcohol discharged as waste water can be reduced, and an eco-friendly process operation is possible.

Abstract: The present disclosure relates to a method for continuously producing a dicarboxylate-based composition and a production system therefor, the method improving a production yield by optimizing process variables of each reactor of a reaction unit in which a plurality of reactors are connected in series.

Abstract: The present invention relates to a reaction control method in which a conversion rate of a reaction may be predicted from a flow rate of a feed introduced into a reactor and a flow rate of product water generated in the reactor, and through which the conversion rate of the reactor may be easily controlled.

Abstract: A method for preparing isopropyl alcohol is provided. The method includes passing reaction water through a first heat exchanger and a second heat exchanger to heat the reaction water, supplying the reaction water having passed through the second heat exchanger to a reactor as a feed stream with a propylene monomer to produce a gaseous reaction product including isopropyl alcohol (IPA), purifying isopropyl alcohol from the gaseous reaction product and recovering process water, and passing the process water through the second heat exchanger to cool the process water, and transferring a portion of the cooled process water to the first heat exchanger, wherein the reaction water is brought into contact with the portion of the cooled process water in the first heat exchanger for primary heating, and then brought into contact with the process water in the second heat exchanger for secondary heating.

Abstract: A method for preparing (meth)acrylic acid, including: bringing a mixed gas including (meth)acrylic acid into contact with water in an absorption column to obtain first and second aqueous (meth)acrylic acid solutions; discharging the first aqueous (meth)acrylic acid solution from a lower portion of the absorption column and supplying the solution to a crystallizer, and discharging the second aqueous (meth)acrylic acid solution from a side portion of the absorption column; supplying the second aqueous (meth)acrylic acid solution to a water separation column to obtain a distillate; supplying the distillate to a high-boiling-point by-product separation column, and supplying an upper discharge stream from the high-boiling-point by-product separation column to the crystallizer; and obtaining purified (meth)acrylic acid in the crystallizer, and circulating a part of mother liquor recovered in the crystallizer to the absorption column and the remainder to the water separation column.

Abstract: A method for preparing a (meth)acrylic acid, the method including: bringing a mixed gas containing (meth)acrylic acid into contact with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; supplying the (meth)acrylic acid aqueous solution to a crystallizer, performing crystallization to obtain purified (meth)acrylic acid, and supplying a mother liquor separated from the purified (meth)acrylic acid to a water separation column; separating, in the water separation column, an upper discharge stream containing water and a lower discharge stream containing (meth)acrylic acid and high-boiling by-products; and supplying the lower discharge stream of the water separation column to a high boiling point by-product separation column, and supplying an upper discharge stream of the high-boiling point by-product separation column containing (meth)acrylic acid to the crystallizer.

Abstract: Provided is a method for preparing synthesis gas and aromatic hydrocarbons, and more particularly, a method for preparing synthesis gas and aromatic hydrocarbons including: supplying a pyrolysis fuel oil (PFO) stream containing PFO and a pyrolysis gas oil (PGO) stream containing PGO to a distillation tower as a feed stream (S10), the PFO stream and the PGO stream being discharged from a naphtha cracking center (NCC) process; and supplying a lower discharge stream from the distillation tower to a combustion chamber for a gasification process and supplying an upper discharge stream from the distillation tower to an SM/BTX preparation process (S20).

Abstract: The present disclosure relates to a preparation system and a preparation method of a diester-based composition. A first alcohol which is a reaction raw material is added to waste water as an extracting agent, and layer separation is performed to separate a second alcohol which is another reaction raw material in the waste water. Accordingly, the amount of alcohol discharged as waste water can be reduced, and an eco-friendly process operation is possible. In addition, it is economical and efficiency to use the alcohol separated again as a reaction raw material.

Abstract: A method for preparing (meth)acrylic acid, including: contacting a mixed gas containing (meth)acrylic acid with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; crystallizing the (meth)acrylic acid aqueous solution in a crystallizer to obtain purified (meth)acrylic acid and a mother liquor; supplying a part of the mother liquor to an extraction column; contacting the mother liquor with an extraction solvent in the extraction column to obtain a raffinate and an extract, and then supplying an extract stream including the extract to a water separation column; separating, in the water separation column, into a water separation column upper discharge stream and a water separation column lower discharge stream; and supplying the water separation column lower discharge stream to a high-boiling-point by-product separation column, and supplying an upper discharge stream of the high-boiling-point by-product separation column containing (meth)acrylic acid to the crystallizer.

Abstract: A method for preparing neopentyl glycol, including: performing an aldol condensation reaction to obtain a first reaction product including hydroxypivaldehyde; bringing the first reaction product into contact with an extracting agent and distilling it to obtain an extract and a raffinate; supplying the raffinate to a saponification reactor to be reduced with a catalyst, and supplying the catalyst to an integrated recovery column; supplying the extract solution to an aldol purification column and distilling it to obtain an upper discharge stream and a lower discharge stream; supplying the upper discharge stream from the aldol purification column to the integrated recovery column and supplying the lower discharge stream from the aldol purification column to a hydrogenation reactor to obtain a second reaction product including neopentyl glycol; and obtaining the neopentyl glycol from the second reaction product.

Abstract: A method for treating wastewater of a neopentyl glycol production process, the method including: recovering wastewater including a catalyst from one or more processes of an aldol purification process, a_neopentyl glycol purification process, and an extractant recovery process, and supplying the wastewater to a volatile organic compounds to a separation column; obtaining, from the separation column for volatile organic compound separation column; obtaining an upper discharge stream including the catalyst and a lower discharge stream including wastewater from which the catalyst has been removed in the volatile organic compound separation column; and supplying the lower discharge stream to a wastewater treatment system to treat the wastewater.

Abstract: Provided is a method of preparing isopropyl alcohol (IPA) including a purification step using a plurality of column, the method allows recovery of IPA with high purity, by separating water first before removing NPA and applying a dividing wall column (DWC) to perform both separation of IPA and NPA and separation of water and high-boiling point organic substances.

Abstract: An apparatus for producing aromatic hydrocarbons including: a C6 separation column; a C7 separation column; a first gasoline hydrogenation unit; a C8 separation column; an extractive distillation column; a hydrodealkylation reaction unit; and a second gasoline hydrogenation unit.

Abstract: A method of preparing isopropyl alcohol including: supplying a feed stream including a propylene monomer and water to a reaction unit and reacting the propylene monomer and water to produce a reaction product including isopropyl alcohol, the propylene monomer, and the water; supplying a first discharge stream including a gaseous reaction product and a second discharge stream including a liquid reaction product from the reaction unit to a stripper; and in the stripper, circulating an upper discharge stream including the propylene monomer to the reaction unit and supplying a lower discharge stream including water and isopropyl alcohol to an isopropyl alcohol purification unit, where the first discharge stream is condensed by a first heat exchanger and supplied as a liquid phase to the stripper.