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    Method of refining raffinate-2
    1.
    发明授权
    Method of refining raffinate-2 有权

    公开(公告)号：US11746072B2

    公开(公告)日：2023-09-05

    申请号：US16625333

    申请日：2018-07-20

    Applicant: LG CHEM, LTD.

    Inventor： Sung Kyun Kim ,  Sung Kyu Lee ,  Yong Mann Beyun ,  Joon Ho Shin ,  Ji Hye Kim

    IPC: C07C7/04 ,  B01D3/14 ,  C07C7/00 ,  B01D3/00 ,  C07C9/10 ,  C07C11/08

    CPC classification number: C07C7/04 ,  B01D3/007 ,  B01D3/143 ,  B01D3/146 ,  C07C7/005 ,  C07C9/10 ,  C07C11/08

    Abstract: A method for separating and refining 1-butene with a high purity and a high yield from a raffinate-2 stream. The method includes: feeding raffinate-2 to a first distillation column; obtaining heavy raffinate-3 from a lower part of the first distillation column; recovering an upper part fraction containing 1-butene from an upper part of the first distillation column; feeding the upper part fraction containing 1-butene to a second distillation column; recovering a first lower part fraction rich in 1-butene from a lower part of the second distillation column and light raffinate-3 from an upper part of the second distillation column. Heat of the upper part fraction recovered from the upper part of the first distillation column is fed to the lower part of the second distillation column through a first heat exchanger. Thus, 1-butene is obtained with high purity and high yield while maximizing an energy recovery amount by double-effect distillation.

    Method and apparatus for preparing oligomer
    3.
    发明授权
    Method and apparatus for preparing oligomer 有权

    公开(公告)号：US11332418B2

    公开(公告)日：2022-05-17

    申请号：US17281198

    申请日：2020-08-07

    Applicant: LG CHEM, LTD.

    Inventor： Eun Kyo Kim ,  Mi Kyung Kim ,  Joon Ho Shin ,  Hye Bin Kim

    IPC: C07C2/06 ,  B01D3/14 ,  B01J19/24 ,  C07C7/00

    Abstract: A method and an apparatus for preparing an oligomer, the method including supplying a feed stream including a monomer to a reactor to perform an oligomerization reaction, recovering unreacted monomer, and dissolving the recovered unreacted monomer in a solvent in a monomer dissolution device and supplying a discharge stream from the monomer dissolution device to the reactor. The method and the apparatus provide reduced investment costs and improved economic feasibility as there is no need to use a refrigerant at a very low temperature or install a separate compressor to recover and reuse the unreacted monomer in an oligomer production process.

    METHOD AND APPARATUS FOR PREPARING ALPHA OLEFIN
    4.
    发明申请
    METHOD AND APPARATUS FOR PREPARING ALPHA OLEFIN 有权

    公开(公告)号：US20210340079A1

    公开(公告)日：2021-11-04

    申请号：US17281081

    申请日：2020-08-04

    Applicant: LG CHEM, LTD.

    Inventor： Hye Bin Kim ,  Eun Kyo Kim ,  Mi Kyung Kim ,  Joon Ho Shin

    IPC: C07C2/06 ,  B01J19/18

    Abstract: A method and an apparatus for preparing an alpha-olefin. The method includes supplying a feed stream including a gaseous ethylene monomer to a monomer dissolution device to dissolve the feed stream in a solvent and form a liquid ethylene monomer, and supplying a feed stream including the liquid ethylene monomer as a discharge stream to a reactor, thereby removing heat of dissolution of the gaseous ethylene monomer outside of the reactor, and decreasing an amount of a refrigerant used in an alpha-olefin production process to improve economic feasibility.

    METHOD FOR VAPORIZING LIQUID PROPANE AND VAPORIZING APPARATUS USED THEREFOR
    7.
    发明申请
    METHOD FOR VAPORIZING LIQUID PROPANE AND VAPORIZING APPARATUS USED THEREFOR 有权

    公开(公告)号：US20210095920A1

    公开(公告)日：2021-04-01

    申请号：US16635102

    申请日：2018-09-05

    Applicant: LG CHEM, LTD.

    Inventor： Tae Woo Kim ,  Sung Kyu Lee ,  Inseop Kim ,  Joon Ho Shin

    IPC: F25J3/02 ,  C10G9/00

    Abstract: A method for vaporizing liquid propane to be supplied as a raw material to a naphtha cracking ractor. The method comprises: decompressing liquid propane to lower a vaporization point and vaporize at least a portion of the liquid propane; utilizing vaporization heat, generated during vaporization of the portion of liquid propane, as a refrigerant; compressing the vaporized propane gas to increase pressure of the propane gas and produce compressed propane gas; and preheating the compressed propane gas. By using this method, it is possible to reduce pressure of liquid propane to a significantly lower pressure than the related art method so that all the vaporization latent heat or vaporization heat included in liquid propane may be utilized as a refrigerant, while also reducing heat energy consumed in a preheat process before it is supplied to the naphtha cracking reactor.

    Method for purifying phenol
    10.
    发明授权
    Method for purifying phenol 有权

    公开(公告)号：US10532968B2

    公开(公告)日：2020-01-14

    申请号：US16071553

    申请日：2017-11-10

    Applicant: LG CHEM, LTD.

    Inventor： Si Nae Lee ,  Sung Kyu Lee ,  Joon Ho Shin

    IPC: C07C37/78 ,  C07C39/04 ,  B01D3/32 ,  B01D3/36 ,  C07C45/84

    Abstract: The present invention relates to a method for purifying phenol, which comprises: supplying a feed comprising phenol, acetone, hydroxyacetone and water to a distillation column at 60° C. to 95° C.; separating the feed into a first fraction, which comprises the acetone, and separates to the upper part of the distillation column and a second fraction, which comprises the phenol, and separates to the lower part of the distillation column; and recovering the first fraction and the second fraction, respectively.

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