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    SYSTEM FOR PRODUCING PHENOL AND BISPHENOL A INCLUDING REMOVAL UNIT FOR REMOVING METHANOL AND ACETONE
    22.
    发明申请
    SYSTEM FOR PRODUCING PHENOL AND BISPHENOL A INCLUDING REMOVAL UNIT FOR REMOVING METHANOL AND ACETONE 审中-公开

    公开(公告)号：US20190225567A1

    公开(公告)日：2019-07-25

    申请号：US16329087

    申请日：2017-11-28

    Applicant: LG CHEM, LTD.

    Inventor： Sang Beom LEE ,  Sung Kyu LEE ,  Joon Ho SHIN ,  Sung Ho LEE ,  Sa Eun PARK ,  In Yong JEONG

    IPC: C07C39/16 ,  C07C39/04 ,  C07C37/20 ,  C07C37/88 ,  C07C37/74

    Abstract: A system for producing phenol and bisphenol A comprising: a first production unit for producing phenol comprising a decomposition reaction unit and a purification unit; a second production unit for producing bisphenol A comprising a reaction unit and a concentration unit; and a removal unit for removing methanol and acetone during the production of phenol and bisphenol A. The removal unit includes a removal column comprising an overhead purge part, a bottom recirculation part and a supply part. The supply part comprises a purification unit discharge part to supply methanol, acetone, and water discharged from the purification unit to the removal column and a concentration unit discharge part to supply phenol, acetone, and water discharged from the concentration unit to the removal column, and is provided to the midsection of the removal column.

    DISTILLATION DEVICE
    25.
    发明申请
    DISTILLATION DEVICE 审中-公开

    公开(公告)号：US20170333808A1

    公开(公告)日：2017-11-23

    申请号：US15518397

    申请日：2015-11-02

    Applicant: LG CHEM, LTD.

    Inventor： Sung Kyu LEE ,  Joon Ho SHIN

    IPC: B01D3/14 ,  C07C47/02 ,  B01D5/00

    CPC classification number: B01D3/14 ,  B01D5/006 ,  C07C45/82 ,  C07C47/02 ,  F25J2200/80

    Abstract: The present application relates to a distillation device. By using the distillation device of the present application, energy loss occurring during a purification process of a mixture including an isomer, for example, a raw material including n-butyl aldehyde and iso-butyl aldehyde, can be minimized, and a high-purity product can be separated, thus increasing economic efficiency of a process.

    METHOD FOR TREATING WASTEWATER OF NEOPENTYL GLYCOL
    29.
    发明申请
    METHOD FOR TREATING WASTEWATER OF NEOPENTYL GLYCOL 有权

    公开(公告)号：US20240417281A1

    公开(公告)日：2024-12-19

    申请号：US18700153

    申请日：2023-09-01

    Applicant: LG CHEM, LTD.

    Inventor： Sung Kyun KIM ,  Sung Kyu LEE ,  Min Wook LEE

    IPC: C02F1/04 ,  C02F101/32 ,  C02F103/36 ,  C07C29/14 ,  C07C29/80 ,  C07C45/64

    Abstract: A method for treating wastewater of a neopentyl glycol production process, the method including: recovering wastewater including a catalyst from one or more processes of an aldol purification process, a_neopentyl glycol purification process, and an extractant recovery process, and supplying the wastewater to a volatile organic compounds to a separation column; obtaining, from the separation column for volatile organic compound separation column; obtaining an upper discharge stream including the catalyst and a lower discharge stream including wastewater from which the catalyst has been removed in the volatile organic compound separation column; and supplying the lower discharge stream to a wastewater treatment system to treat the wastewater.

    METHOD OF MANUFACTURING DIESTER-BASED COMPOUND
    30.
    发明公开
    METHOD OF MANUFACTURING DIESTER-BASED COMPOUND 审中-公开

    公开(公告)号：US20230348355A1

    公开(公告)日：2023-11-02

    申请号：US17639447

    申请日：2021-08-20

    Applicant: LG CHEM, LTD.

    Inventor： Jae Hun JEONG ,  Yeon Uk CHOO ,  Sung Kyu LEE

    IPC: C07C67/08 ,  C07C67/48 ,  C07C67/58 ,  B01J19/24 ,  B01D17/02

    CPC classification number: C07C67/08 ,  C07C67/48 ,  C07C67/58 ,  B01J19/245 ,  B01D17/0214

    Abstract: A diester-based compound is continuously prepared in a total of n reaction units serially connected, each reaction unit includes a reactor and layer separator. The preparation includes: supplying and esterifying a feed stream including a dicarboxylic acid and an alcohol into a first reactor to prepare a reaction product, and supplying a lower draw-off stream including the reaction product into reactors of rear reaction units; supplying an upper draw-off stream of the first reactor into a first layer separator, refluxing a lower draw-off stream including an alcohol from the first layer separator into the first reactor; and supplying an upper draw-off stream of at least one reactor of second to and nth reactors into each of the layer separators, splitting a portion of the lower draw-off stream including the alcohol from each of the layer separators, and refluxing only a portion of the split stream into each of the reactors.

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