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公开(公告)号：US12221412B2
公开(公告)日：2025-02-11
申请号：US17613868
申请日：2020-09-10
Applicant: LG CHEM, LTD.
Inventor： Yeon Uk Choo , Sung Kyu Lee , Jae Hun Jeong
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.
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公开(公告)号：US11975991B2
公开(公告)日：2024-05-07
申请号：US17604952
申请日：2020-07-01
Applicant: LG CHEM, LTD.
Inventor： Yeon Uk Choo , Sung Kyu Lee , Hyun Kyu Kim , Chan Hyu Jin , Hyoung Jun , Jin Sung Park
CPC classification number: C02F1/40 , B01D17/0208 , B01D17/0211 , B01D21/0018 , B01D21/003 , B01D21/02 , B01D21/10 , B01D21/2461 , C07C67/56
Abstract: A neutralization/water separation device for an esterified product including: a neutralization tank in which a crude product mixture containing alcohol and an ester compound, a neutralizing agent, and water are put to produce a neutralized mixture; a water separation tank disposed below the neutralization tank to divide the neutralization mixture into a floating layer and an aqueous layer; a partition wall extending downward from a ceiling of the water separation tank to provide a lower passage in the water separation tank; and a transfer line that transfers the neutralized mixture from the neutralization tank to the water separation tank, where the water separation tank includes: a first water separation part into which the neutralized mixture is introduced from the neutralization tank through the transfer line; and a second water separation part into which the neutralized mixture is introduced from the first water separation part through the lower passage, where the first water separation part and the second water separation part are partitioned by the partition wall.
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公开(公告)号：US12290769B2
公开(公告)日：2025-05-06
申请号：US17603859
申请日：2020-07-02
Applicant: LG CHEM, LTD.
Inventor： Jae Hun Jeong , Sung Kyu Lee , Yeon Uk Choo , Hyoung Jun , Hyun Kyu Kim , Chan Hyu Jin , Jin Sung Park
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. According to the present invention, a coolant usage amount can be reduced and a rheological problem can be eliminated since a liquid phase and a gas phase coexist in a pipe.
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4.发明授权公开(公告)号：US11794162B2
公开(公告)日：2023-10-24
申请号：US17600284
申请日：2020-07-02
Applicant: LG CHEM, LTD.
Inventor： Jae Hun Jeong , Sung Kyu Lee , Yeon Uk Choo , Hyoung Jun , Chan Hyu Jin
CPC classification number: B01J19/0013 , B01D3/143 , B01J19/245 , B01J2219/00074
Abstract: The present disclosure relates to a heat exchange system which is capable of saving energy consumed in a whole process by exchanging heat of different streams from each other, included in a continuous preparation system of a diester-based composition.
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公开(公告)号：US12122747B2
公开(公告)日：2024-10-22
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
CPC classification number: C07C67/08 , B01D17/0214 , B01D19/0036 , B01J19/0013 , B01J19/245 , B01J19/2465 , C07C67/475 , C07C67/52 , C07C69/82 , B01J2219/00033 , B01J2219/00087 , B01J2219/00108 , C07C67/08 , C07C69/82
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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Patent Agency Ranking
公开(公告)号：US10918968B2
公开(公告)日：2021-02-16
申请号：US16068041
申请日：2017-09-06
Applicant: LG CHEM, LTD.
Inventor： Tae Woo Kim , Sung Kyu Lee , Sung Kyun Kim , Joon Ho Shin , Yeon Uk Choo
Abstract: The present application relates to a selective distillation apparatus and a distillation method, which provides a distillation apparatus capable of switching between a serial connection mode and a parallel connection mode on the situation, thereby enabling selective operation of high-efficiency operation and high-capacity operation.
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公开(公告)号：US12275698B2
公开(公告)日：2025-04-15
申请号：US17635925
申请日：2021-08-20
Applicant: LG CHEM, LTD.
Inventor： Jae Hun Jeong , Sung Kyu Lee , Yeon Uk Choo , Song Hoon Lee , Hyoung Jun , Yun Gon Heo
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.
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公开(公告)号：US12186729B2
公开(公告)日：2025-01-07
申请号：US17600889
申请日：2020-07-02
Applicant: LG CHEM, LTD.
Inventor： Yeon Uk Choo , Sung Kyu Lee , Joon Ho Shin , Hyoung Jun , Chan Hyu Jin
IPC: B01J19/00 , B01D17/12 , B01J19/24 , B01J19/26 , C02F1/26 , C07C67/03 , C07C67/08 , C07C67/52 , C07C67/58
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.
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公开(公告)号：US11485692B2
公开(公告)日：2022-11-01
申请号：US16647828
申请日：2019-07-04
Applicant: LG CHEM, LTD.
Inventor： Tae Woo Kim , Sung Kyu Lee , In Seop Kim , Joon Ho Shin , Yeon Uk Choo
Abstract: A method for preparing ethylene including: feeding a thermally cracked compressed stream to a first distillation apparatus selectively operating as a first deethanizer or a depropanizer; and feeding an overhead discharge stream of the first distillation apparatus to a second distillation apparatus. When the first distillation apparatus is operated as the first deethanizer, a bottom discharge stream of the second distillation apparatus is fed to a C2 separator. When the first distillation apparatus is operated as the depropanizer, the bottom discharge stream of the second distillation apparatus is passed through a third distillation apparatus and fed to the C2 separator.
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公开(公告)号：US20220314186A1
公开(公告)日：2022-10-06
申请号：US17608082
申请日：2020-09-18
Applicant: LG CHEM, LTD.
Inventor： Yeon Uk Choo , Sung Kyu Lee , Hyoung Jun , Hyun Kyu Kim , Chan Hyu Jin , Jin Sung Park
Abstract: An esterification reaction apparatus and an esterification reaction method, the esterification reaction apparatus comprising a reaction tank having an accommodation part, in which a raw material containing carboxylic acid and alcohol is accommodated, a heating unit configured to individually heat partition regions that are partitioned into N regions in a vertical direction of the accommodation part, and a controller configured to control the heating unit so that only the partition regions in which a liquid is accommodated among the N partition regions are heated, thereby performing an esterification reaction of the raw material.
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