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    Method for preparing polymer
    1.
    发明授权
    Method for preparing polymer 有权

    公开(公告)号：US12215176B2

    公开(公告)日：2025-02-04

    申请号：US17627568

    申请日：2021-07-01

    Applicant: LG CHEM, LTD.

    Inventor： Jeong A Hwang ,  Dae Young Shin ,  Eun Jung Joo

    IPC: C08F212/10 ,  B01D53/00 ,  C08F6/00 ,  C08F6/12

    Abstract: Provided is a method of preparing a polymer including: supplying a monomer stream and a solvent stream to a reactor and performing a polymerization reaction to prepare a reaction product; supplying a reactor discharge stream to a volatilization device, separating a polymer from a lower portion of the volatilization device, splitting an upper discharge stream including an unreacted monomer, a solvent, and an inert gas into two or more streams, and divisionally supplying the split streams to a plurality of condensers, respectively; condensing and separating the unreacted monomer and the solvent in each of the condensers and supplying a gaseous stream therefrom to a condenser installed at a rear end of each condenser; and supplying a gaseous stream discharged from a condenser installed at the rearmost end to a vacuum unit.

    Solvent separation method and solvent separation apparatus
    2.
    发明授权
    Solvent separation method and solvent separation apparatus 有权

    公开(公告)号：US11083979B2

    公开(公告)日：2021-08-10

    申请号：US16495535

    申请日：2018-08-30

    Applicant: LG CHEM, LTD.

    Inventor： Sung Keun Jang ,  Dae Young Shin ,  Chang Hoe Heo ,  Seung Won Choi ,  Eun Jung Joo

    IPC: B01D3/06 ,  B01D11/04 ,  C07C29/80 ,  B01J3/00

    Abstract: A separation method and a separation apparatus for a solvent extracted by supercritical extraction. The separation method increases a solvent recovery rate by minimizing the amount of a solvent to be evaporated and lost since the pressure of a solvent is reduced by arranging two or more separators in series. The method includes: introducing a fluid having passed through a supercritical extractor into a first flash vessel; introducing the fluid which has passed through the first flash vessel into a second flash vessel; and discharging and recovering the carbon dioxide and the solvent which have passed through the second flash vessel, respectively. The pressure of the first flash vessel is 40-100 bar, and the pressure of the second flash vessel is 1-30 bar. The fluid includes carbon dioxide and a solvent.

    METHOD FOR RECOVERING ETHYLENE AND VINYL-BASED COMONOMER
    5.
    发明申请
    METHOD FOR RECOVERING ETHYLENE AND VINYL-BASED COMONOMER 审中-公开

    公开(公告)号：US20190085101A1

    公开(公告)日：2019-03-21

    申请号：US15743491

    申请日：2017-08-23

    Applicant: LG Chem, Ltd.

    Inventor： Dae Young Shin ,  Eun Jung Joo ,  Joon Ho Shin ,  Chang Hoe Heo ,  Sung Keun Jang

    IPC: C08F6/00 ,  C08F210/02

    Abstract: The present invention relates to a method for recovering ethylene and a vinyl-comonomer that is capable of improving the rate of recovery of unreacted monomers remaining after polymerization of ethylene and a vinyl-based comonomer and increasing process efficiency through the reduction of costs.Specifically, the method for recovering ethylene and a vinyl-comonomer includes: a step of polymerizing ethylene and a vinyl-based comonomer at a pressure of 1500 bar or more; a step of depressurizing the product obtained in the polymerization step including an ethylene-vinyl-based comonomer polymer, ethylene, and a vinyl-based comonomer to 0.1 bar to 5 bar; a step of adding ethylene to the product obtained in the polymerization step under the pressure of 0.1 bar to 5 bar; and a step of separating ethylene and a vinyl-based comonomer from the product obtained in the polymerization step to which the ethylene is added.

    APPARATUS FOR SEPARATING GAS AND LIQUID
    6.
    发明申请
    APPARATUS FOR SEPARATING GAS AND LIQUID 有权
    用于分离气体和液体的装置

    公开(公告)号：US20150274546A1

    公开(公告)日：2015-10-01

    申请号：US14437421

    申请日：2014-07-18

    Applicant: LG CHEM., LTD.

    Inventor： Dae Young Shin ,  Eun Jung Joo ,  Dong Kwon Lee ,  Chang Hoe Heo ,  Jong Ku Lee

    IPC: C02F1/20 ,  B01D19/00

    CPC classification number: B01D19/0052 ,  B01D45/14 ,  B01D46/002 ,  B01D46/0068 ,  B01D46/0075 ,  B01D46/2411 ,  B01J10/00 ,  B01J19/006 ,  B01J19/0066 ,  B01J19/1887 ,  B01J2219/00247 ,  B01J2219/0077 ,  B01J2219/00779

    Abstract: Disclosed is an apparatus for separating gas and liquid. The apparatus for separating gas and liquid includes a housing, a rotating shaft provided inside the housing, a drive unit configured to rotate the rotating shaft, a rotating cone mounted at the rotating shaft to rotate about the rotating shaft and having a diameter decreasing from an upper end to a lower end thereof, a fixed cone fixed in the housing to be spaced apart from the rotating cone and having a diameter decreasing from an upper end to a lower end thereof, and a scraper configured to remove scale generated in at least one of the fixed cone and the rotating cone, based on the rotation of the rotating shaft.

    Abstract translation: 公开了一种用于分离气体和液体的装置。 用于分离气体和液体的装置包括壳体，设置在壳体内部的旋转轴，构造成旋转旋转轴的驱动单元，安装在旋转轴处的旋转锥体，以围绕旋转轴旋转，并且具有从 固定在所述壳体中的固定锥体与所述旋转锥体间隔开并且具有从其上端到下端的直径，以及被构造成去除在至少一个 的固定锥体和旋转锥体，基于旋转轴的旋转。

    Centrifugal dehydrator and centrifugal dehydration method
    7.
    发明授权
    Centrifugal dehydrator and centrifugal dehydration method 有权

    公开(公告)号：US12234169B2

    公开(公告)日：2025-02-25

    申请号：US17420339

    申请日：2020-06-09

    Applicant: LG CHEM, LTD

    Inventor： Sung Woo Jeong ,  In Yong Jeong ,  Sang Ho Lee ,  Eun Jung Joo ,  Dae Young Shin

    IPC: C02F11/127 ,  B01D53/26

    Abstract: A centrifugal dehydrator according to an embodiment of the present disclosure for solving the above problems includes: a slurry flow tube through which slurry, in which polymers and water are mixed, flows; a gas flow tube through which a gas flows; a mixture flow tube which is connected from the slurry flow tube and the gas flow tube and through which a mixture of the slurry and the gas flows; a basket into which the mixture is injected from the mixture flow tube and which rotates to apply centrifugal force to the slurry in the mixture; a driving part that allows the basket to rotate; and a porous plate disposed on a peripheral portion of the basket to discharge the water from the slurry to the outside of the basket.

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