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    METHOD OF PREPARING DIESTER-BASED MATERIAL
    2.
    发明申请
    METHOD OF PREPARING DIESTER-BASED MATERIAL 有权

    公开(公告)号：US20220371984A1

    公开(公告)日：2022-11-24

    申请号：US17635925

    申请日：2021-08-20

    申请人： LG CHEM, LTD.

    发明人： Jae Hun JEONG ,  Sung Kyu LEE ,  Yeon Uk CHOO ,  Song Hoon LEE ,  Hyoung JUN ,  Yun Gon HEO

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

    摘要： 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.

    BATCH PREPARATION METHOD OF ESTER-BASED MATERIAL
    4.
    发明公开
    BATCH PREPARATION METHOD OF ESTER-BASED MATERIAL 审中-公开

    公开(公告)号：US20230303475A1

    公开(公告)日：2023-09-28

    申请号：US18015640

    申请日：2021-09-17

    申请人： LG CHEM, LTD.

    发明人： Hyun Kyu KIM ,  Jeong Ju MOON ,  Eun Suk KIM ,  Yun Gon HEO

    IPC分类号： C07C67/08 ,  C07C67/48

    CPC分类号： C07C67/08 ,  C07C67/48

    摘要： The present invention provides a method for preparing an ester-based material, the method including a step in which in a batch reactor, under a catalyst, at least one polycarboxylic acid selected from the group consisting of a terephthalic acid, a phthalic acid, an isophthalic acid, a cyclohexane dicarboxylic acid, a cyclohexane tricarboxylic acid, a trimellitic acid, and citric acid reacts with at least one mono-alcohol having 3 to 12 alkyl carbon atoms, wherein pressure in the reactor is configured such that the pressure at the early stage is 0.3 barg to 1.0 barg and the pressure at the latter stage is 0 barg to 0.5 barg, the pressure at the early stage being greater than the pressure at the latter stage, and the early and latter stages are divided based on any one of the time points when reaction conversion rate is 30% to 90%.