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公开(公告)号：US20200263095A1
公开(公告)日：2020-08-20
申请号：US16645647
申请日：2019-07-02
Applicant: LG CHEM, LTD.
Inventor： In Seop KIM , Seok Goo LEE , Sung Kyu LEE , Tae Woo KIM , Joon Ho SHIN
Abstract: A method for quenching a pyrolysis product, including: supplying a discharge stream from a liquid decomposition furnace to a first quench tower; supplying an upper discharge stream from the first quench tower to a second quench tower; supplying a discharge stream from a first gas decomposition furnace to the second quench tower; and supplying a discharge stream from a second gas decomposition furnace to the second quench tower.
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公开(公告)号：US20220185761A1
公开(公告)日：2022-06-16
申请号：US17603208
申请日：2020-07-02
Applicant: LG CHEM, LTD.
Inventor： Jae Hun JEONG , Sung Kyu LEE , Yeon Uk CHOO , Hyun Kyu KIM , Seok Goo LEE
Abstract: The present disclosure relates to a continuous production method of a diester-based material in a continuous production process comprising a reaction part in which a total of N reaction units from a first reaction unit to an N-th reaction unit are connected in series. The method comprising the step of feeding dicarboxylic acid and a primary alcohol, wherein the feed of the primary alcohol is divided into front-end feed of being fed into a first reaction unit and rear-end feed of being fed into one or more reaction units selected among from a second reaction unit to an N-th reaction unit, wherein the amount of the rear-end feed is 5 to 80 wt % based on the total feed amount of the primary alcohol into a reaction part, and the N is an integer of 3 to 6. According to the present invention, it is possible to ensure the ease of process operation through reducing the amount of reflux compared to a typical batch process and reducing the volume of steam for heating a reactor, and to ensure the economic feasibility of a product through saving energy.
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公开(公告)号：US20220213019A1
公开(公告)日：2022-07-07
申请号：US17603549
申请日：2020-07-02
Applicant: LG CHEM, LTD.
Inventor： Jae Hun JEONG , Sung Kyu LEE , Yeon Uk CHOO , Seok Goo LEE
Abstract: The present disclosure relates to a continuous production system and a diester-material production unit included therein, wherein the production unit includes a reaction device in which an esterification reaction of dicarboxylic acid and a primary alcohol is performed, a column in which gas-liquid separation of the primary alcohol and the water introduced is performed, a heat exchange device for recovering heat of a gas phase line of the column, a condenser installed at a rear end of the heat exchange device and liquefying a mixture of a gas-phase primary alcohol and water, and a layer separator in which the layer separation of a mixture of a liquefied primary alcohol and water is performed, wherein the heat exchange device includes one or more of a first heat exchanger for performing heat exchange with a raw material feed line of the reaction device, a second heat exchanger for performing heat exchange with a line through which a low temperature stream flows in a process, and a third heat exchanger for performing heat exchange with condensed water generated in the process. According to the present disclosure, the amount of a coolant used and the volume of steam of a reactor may be reduced, and the thermal efficiency of the entire process may be improved.
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公开(公告)号：US20210317063A1
公开(公告)日：2021-10-14
申请号：US17273279
申请日：2019-09-18
Applicant: LG CHEM, LTD.
Inventor： Seok Goo LEE , Sung Kyu LEE , Joon Ho SHIN
Abstract: Provided is a method for manufacturing a terephthalate-based composition, the method comprising: a step (S1) of flowing in a dialkyl terephthalate in which alkyl has 7 to 10 carbon atoms and a primary alcohol with a low boiling point having 4 or 5 carbon atoms into a reactor and performing transesterification of the dialkyl terephthalate and the primary alcohol with a low boiling point and a step (S2) of extracting in a reduced pressure an unreacted material and a by-product from the reactor after finishing the transesterification, wherein the step S1 comprises a pressure-applying step in which the pressure of the reactor is 1.5 to 2.5 bar.
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