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

IPC: C07C67/54 ,  B01D19/00 ,  B01J19/00 ,  C07C67/08

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.

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

IPC: C07C67/08 ,  B01D17/02 ,  B01D19/00 ,  B01J19/00 ,  B01J19/24 ,  C07C67/475 ,  C07C67/52 ,  C07C69/82

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.

公开(公告)号：US12084413B2

公开(公告)日：2024-09-10

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

IPC: C07C67/08 ,  B01J19/00 ,  C07C67/52 ,  C07C69/75 ,  C07C69/80 ,  C07C69/82

CPC classification number: C07C67/08 ,  B01J19/0066 ,  C07C67/52 ,  C07C69/75 ,  C07C69/80 ,  C07C69/82 ,  B01J2219/00033 ,  B01J2219/0004

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.

公开(公告)号：US20220402853A1

公开(公告)日：2022-12-22

申请号：US17639031

申请日：2021-06-03

Applicant: LG CHEM, LTD.

Inventor： Yeon Uk Choo ,  Jae Hun Jeong ,  Sung Kyu Lee

IPC: C07C67/08 ,  B01J4/00

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.

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

IPC: B01J19/00 ,  B01D3/14 ,  B01J19/24

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.