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    A METHOD FOR SYNTHESIZING GLYCOLIDE
    1.
    发明公开
    A METHOD FOR SYNTHESIZING GLYCOLIDE 审中-公开

    公开(公告)号：US20240287017A1

    公开(公告)日：2024-08-29

    申请号：US18569830

    申请日：2022-06-14

    申请人： East China University of Science and Technology

    发明人： Jinghong ZHOU ,  Xiaofeng XU ,  Yueqiang CAO ,  Wei LI

    IPC分类号： C07D319/12 ,  C07C67/02

    CPC分类号： C07D319/12 ,  C07C67/02

    摘要： This invention provides a method for synthesizing glycolide using methyl glycolate as a raw material, comprising two steps as illustrated in the following reaction formulas:




    wherein, the ROH represents a straight/branched chain alcohol, acid or ester containing 18-30 carbons and at least one hydroxyl group. The method for glycolide synthesis disclosed in the present invention manages to maintain a low viscosity within the reaction system by introducing a high-boiling alcohol into the reaction system to form a larger alkoxy glycolate exhibiting a significantly lower molecular weight compared to the typical glycolic acid oligomers utilized in the conventional process. Thus the challenges of coking and inefficient heat transfer encountered in traditional glycolide synthesis routes are effectively addressed.

    ESTER-BASED COMPOUND AND USE THEREOF
    4.
    发明申请
    ESTER-BASED COMPOUND AND USE THEREOF 有权

    公开(公告)号：US20230054496A1

    公开(公告)日：2023-02-23

    申请号：US17789803

    申请日：2020-07-16

    申请人： HANWHA SOLUTIONS CORPORATION

    发明人： Minjeong KIM ,  Paul KANG ,  Kidon KIM ,  Yangjung KIM

    IPC分类号： C07C69/75 ,  C08K5/12 ,  C07C67/02

    摘要： Provided are a novel ester-based compound and a use thereof. A use of a novel ester-based compound for improving heat resistance and compatibility as a plasticizer is provided. When the ester-based compound according to the present invention is used as the plasticizer of a heat-resistant resin composition, a synergistic effect on improvement of physical properties such as migration resistance and heating loss is provided to contribute to improvement of the physical properties of a molded article, and due to a rapid absorption rate and a short melting time, processability of the heat-resistant resin composition may be improved.

    PROCESS FOR PRODUCING DIMETHYL 2,3,5,6-TETRACHLORO-1,4-BENZENEDICARBOXYLATE
    5.
    发明申请
    PROCESS FOR PRODUCING DIMETHYL 2,3,5,6-TETRACHLORO-1,4-BENZENEDICARBOXYLATE 有权

    公开(公告)号：US20220267244A1

    公开(公告)日：2022-08-25

    申请号：US17635653

    申请日：2021-01-25

    申请人： SDS BIOTECH K.K.

    发明人： Toshihiko Tabuchi ,  Masaaki Sakai ,  Teruhiko Ishii

    IPC分类号： C07C67/02 ,  C07C51/08

    摘要： The present invention provides a process for producing a compound represented by formula (I), comprising the steps of (a) reacting a compound represented by formula (II) with dimethyl sulfate in the presence of an alkali carbonate in a aqueous ketone solvent to obtain the compound represented by formula (I) as a crystalline material, and (b) washing the crystalline material with heated water at 30 to 100° C. and then further washing with an organic solvent at 30 to 80° C.

    Method for manufacturing terephthalate-based composition comprising applying pressure
    6.
    发明授权
    Method for manufacturing terephthalate-based composition comprising applying pressure 有权

    公开(公告)号：US11407706B2

    公开(公告)日：2022-08-09

    申请号：US17273279

    申请日：2019-09-18

    申请人： LG CHEM, LTD.

    发明人： Seok Goo Lee ,  Sung Kyu Lee ,  Joon Ho Shin

    IPC分类号： C07C67/03 ,  C07C67/02 ,  B01J19/00 ,  C07C67/48

    摘要： Provided is a method for manufacturing a terephthalate-based composition, the method comprising: a step (S1) of flowing in a dialkyl terephthalate in which alkyl has 7 to 10 carbon atoms and a primary alcohol with a low boiling point having 4 or 5 carbon atoms into a reactor and performing transesterification of the dialkyl terephthalate and the primary alcohol with a low boiling point; and a step (S2) of extracting in a reduced pressure an unreacted material and a by-product from the reactor after finishing the transesterification, wherein the step S1 comprises a pressure-applying step in which the pressure of the reactor is 1.5 to 2.5 bar.