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    Polymer polyol and process for producing the same
    2.
    发明授权
    Polymer polyol and process for producing the same 有权

    公开(公告)号：US11976151B2

    公开(公告)日：2024-05-07

    申请号：US18049780

    申请日：2022-10-26

    申请人： KOREA KUMHO PETROCHEMICAL CO., LTD.

    发明人： Seulgi Kim ,  Gi Jung Kim ,  Jinwoo Park

    IPC分类号： C08F283/06

    CPC分类号： C08F283/06

    摘要： Disclosed is a process for producing a polymer polyol, comprising: (a) reacting a first mixture comprising an initiator, a polyol, a diluent, a stabilizer, a styrene-based monomer and a nitrile-based monomer; and (b) continuously adding, to the first mixture, a second mixture comprising an initiator, a polyol, a stabilizer, a styrene-based monomer and a nitrile-based monomer to react, wherein the first mixture and second mixture comprise the stabilizer in a weight ratio of 1:1 to 3, respectively, and a polymer polyol produced according to the process.

    PREPARATION PROCESS OF 5-ETHYLIDENE-2-NORBORNENE
    3.
    发明公开
    PREPARATION PROCESS OF 5-ETHYLIDENE-2-NORBORNENE 审中-公开

    公开(公告)号：US20240076252A1

    公开(公告)日：2024-03-07

    申请号：US18324487

    申请日：2023-05-26

    申请人： KOREA KUMHO PETROCHEMICAL CO., LTD.

    发明人： Young Rok LEE ,  Jae Woom KIM ,  Kyoung Ho ROW ,  Ick Jin AN ,  Jin Woo PARK ,  Yu Mi KIM

    IPC分类号： C07C13/20 ,  B01J21/04 ,  B01J37/04 ,  B01J37/08

    CPC分类号： C07C13/20 ,  B01J21/04 ,  B01J37/04 ,  B01J37/08 ,  C07C2521/04

    摘要： A preparation process of 5-ethylidene-2-norbornene, including: introducing dicyclopentadiene into a dicyclopentadiene decomposition reactor to thermally decompose the dicyclopentadiene; introducing a product of the above step into a cyclopentadiene purification tower; introducing 1,3-butadiene, a solvent, and cyclopentadiene separated from the top of the cyclopentadiene purification tower into a Diels-Alder reactor to react the same; introducing a product of the immediate above step into a 1,3-butadiene removal tower to recover 1,3-butadiene from the top; introducing a mixture at the bottom of the 1,3-butadiene removal tower into a desolvation tower, and recycling a solvent and unreacted raw materials recovered from the top of the desolvation tower to the dicyclopentadiene decomposition reactor; introducing a mixture at the bottom of the desolvation tower into a 5-vinyl-2-norbornene separation tower to separate 5-vinyl-2-norbornene; and introducing the 5-vinyl-2-norbornene into an isomerization reactor to react the same.

    POLYMER POLYOL AND PROCESS FOR PRODUCING THE SAME
    5.
    发明公开
    POLYMER POLYOL AND PROCESS FOR PRODUCING THE SAME 审中-公开

    公开(公告)号：US20230399449A1

    公开(公告)日：2023-12-14

    申请号：US18049780

    申请日：2022-10-26

    申请人： KOREA KUMHO PETROCHEMICAL CO., LTD.

    发明人： Seulgi KIM ,  Gi Jung KIM ,  Jinwoo PARK

    IPC分类号： C08F283/06

    CPC分类号： C08F283/06

    摘要： Disclosed is a process for producing a polymer polyol, comprising: (a) reacting a first mixture comprising an initiator, a polyol, a diluent, a stabilizer, a styrene-based monomer and a nitrile-based monomer; and (b) continuously adding, to the first mixture, a second mixture comprising an initiator, a polyol, a stabilizer, a styrene-based monomer and a nitrile-based monomer to react, wherein the first mixture and second mixture comprise the stabilizer in a weight ratio of 1:1 to 3, respectively, and a polymer polyol produced according to the process.

    METHOD OF PREPARING A THIOMETHYLPHENOL DERIVATIVE
    7.
    发明申请
    METHOD OF PREPARING A THIOMETHYLPHENOL DERIVATIVE 有权

    公开(公告)号：US20230130731A1

    公开(公告)日：2023-04-27

    申请号：US17911886

    申请日：2021-10-18

    申请人： KOREA KUMHO PETROCHEMICAL CO., LTD.

    发明人： Kee Yoon ROH ,  Sang Hun JANG ,  Jung Hei CHOI

    IPC分类号： C07C323/16 ,  C07C315/02

    摘要： A method of preparing a thiomethylphenol derivative is disclosed, the method including: (a) carrying out a primary reaction of a phenol derivative represented by the following Chemical Formula 2, a mercaptan derivative represented by R4SH, and paraformaldehyde at a reaction temperature T1 under conditions in which a heterocyclic base having 3 to 10 carbon atoms and an acid are simultaneously present; and (b) carrying out a secondary reaction at a reaction temperature T2 to prepare a thiomethylphenol derivative represented by the following Chemical Formula 1, wherein T1

    Method for manufacturing multi-wall carbon nanotubes using continuous type process
    9.
    发明授权
    Method for manufacturing multi-wall carbon nanotubes using continuous type process 有权

    公开(公告)号：US11117803B2

    公开(公告)日：2021-09-14

    申请号：US16490772

    申请日：2018-03-02

    申请人： KOREA KUMHO PETROCHEMICAL CO., LTD.

    发明人： Sang Hyo Ryu ,  Hyun Kyung Sung ,  Chung Heon Jeong ,  Dong Hwan Kim

    IPC分类号： C01B32/164 ,  C01B32/162 ,  B01J8/24 ,  B01J35/00 ,  B82Y30/00 ,  B82Y40/00

    摘要： A method for manufacturing multi-wall carbon nanotubes, includes the steps of: (a) dissolving a metal precursor in a solvent to prepare a precursor solution; (b) perform thermal decomposition while spraying the precursor solution into a reactor, thereby forming a catalyst powder; and (c) introducing the catalyst powder into a fluidized-bed reactor heated to 600-900° C. and spraying a carbon-based gas and a carrier gas to synthesize multi-wall carbon nanotubes from the catalyst powder, wherein steps (a) to (c) are performed in a continuous type and wherein the catalyst powder contains metal components according to equation 1 below. Ma:Mb=x:y, wherein Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0≤x≤7.5, and 2.5≤y≤8.0.