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    Method of preparing diester-based material
    2.
    发明授权
    Method of preparing diester-based material 有权

    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

    IPC: C07C67/08 ,  C07C67/58 ,  C07C69/82

    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.

    Continuous production method of diester-based material
    4.
    发明授权
    Continuous production method of diester-based material 有权

    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.

    Diester-based material production unit and diester-based material production system including the same
    6.
    发明授权
    Diester-based material production unit and diester-based material production system including the same 有权

    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

    IPC: B01D3/00 ,  B01D3/06 ,  B01D3/42 ,  B01D53/00 ,  C07C67/08 ,  C07C67/52

    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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