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    METHOD FOR SEPARATING POLYBUTENE
    5.
    发明申请
    METHOD FOR SEPARATING POLYBUTENE 有权

    公开(公告)号：US20220025079A1

    公开(公告)日：2022-01-27

    申请号：US17291955

    申请日：2020-01-17

    Applicant: LG CHEM, LTD.

    Inventor： Woo Sung HWANG ,  Jeong Seok LEE ,  Won Hee KIM ,  Hye Mi KIM ,  Gyeong Shin CHOI ,  Dong Hyun JO

    IPC: C08F6/12 ,  C08F10/08 ,  C08F6/00

    Abstract: A method for separating polybutene, the method including: (1) introducing a polybutene solution into a distillation column, the solution including polybutene, a halogenated hydrocarbon solvent, and a non-polar hydrocarbon solvent and having a viscosity of 1 cp to 50 cp measured at 25° C. using a rotational viscometer; (2) collecting an upper stream including the halogenated hydrocarbon solvent and a portion of the non-polar hydrocarbon solvent from an upper portion of the distillation column, and collecting a lower stream including the polybutene and a remaining portion of the non-polar hydrocarbon solvent from a lower portion of the distillation column, where the lower stream has a viscosity of 10 cp to 150 cp; and (3) separating the remaining portion of the non-polar hydrocarbon solvent and the polybutene from the lower stream.

    METHOD FOR PREPARING POLYBUTYLENE TEREPHTHALATE
    7.
    发明申请
    METHOD FOR PREPARING POLYBUTYLENE TEREPHTHALATE 审中-公开

    公开(公告)号：US20190092900A1

    公开(公告)日：2019-03-28

    申请号：US16086286

    申请日：2017-10-19

    Applicant: LG CHEM, LTD.

    Inventor： Suk Yung OH ,  Soo Hwan HWANG ,  Jeong Seok LEE ,  Mi Kyung KIM

    IPC: C08G63/183 ,  C08G63/78

    Abstract: The present disclosure relates to a method for preparing polybutylene terephthalate, and the method for preparing polybutylene terephthalate of the present disclosure recycles the recovered 1,4-butanediol, so the condensation efficiency in the condenser is not lowered. Therefore, the degree of vacuum of the polycondensation reactor is maintained, so that the preparation efficiency and the degree of polymerization of polybutylene terephthalate can be increased.

    METHOD FOR PRODUCING BUTADIENE THROUGH OXIDATIVE DEHYDROGENATION REACTION
    8.
    发明申请
    METHOD FOR PRODUCING BUTADIENE THROUGH OXIDATIVE DEHYDROGENATION REACTION 审中-公开
    通过氧化脱氢反应生产丁二烯的方法

    公开(公告)号：US20160326071A1

    公开(公告)日：2016-11-10

    申请号：US15110666

    申请日：2015-06-09

    Applicant: LG CHEM, LTD.

    Inventor： Mi Kyung KIM ,  Jeong Seok LEE ,  Jae Ik LEE ,  Dae Hyeon KIM ,  Jong Ku LEE

    IPC: C07C7/11 ,  C07C5/48

    CPC classification number: C07C7/11 ,  C07C5/48 ,  C07C2523/18 ,  C07C2523/28 ,  C07C2523/31 ,  C07C11/167

    Abstract: The present invention relates to a method for producing butadiene through an oxidative dehydrogenation reaction, the method including steps of a) introducing a first stream which includes C4 fraction, steam, oxygen (O2), and nitrogen (N2) into a reactor which is filled with catalyst to perform oxidative dehydrogenation reaction; b) selectively absorbing butadiene, which is obtained from the reactor, into an absorption solvent, and separating and removing C4 mixture other than the dutadiene and light gas product; and c) recovering and purifying the butadiene. Through integration of the gas separating and purifying steps by using the single absorption solvent during production of butadiene, equipment costs and operating costs accruing from repeated introduction and removal of solvent are reduced, thereby ensuring economic competitiveness of the process.

    Abstract translation: 本发明涉及通过氧化脱氢反应生产丁二烯的方法，该方法包括以下步骤：a）将包含C4馏分，蒸汽，氧气（O 2）和氮气（N 2）的第一流引入填充的反应器中 用催化剂进行氧化脱氢反应; b）选择性地将从反应器获得的丁二烯吸收到吸收溶剂中，以及除去二丁二烯和轻质气体产物之外的C4混合物; 和c）回收和纯化丁二烯。 通过在丁二烯生产过程中通过使用单一吸收溶剂来整合气体分离和纯化步骤，降低了反复引入和除去溶剂所产生的设备成本和运行成本，从而确保了该方法的经济竞争力。

    METHOD OF RECYCLING ENERGY IN PROCESS OF BUTADIENE PREPARATION (As Amended)
    9.
    发明申请
    METHOD OF RECYCLING ENERGY IN PROCESS OF BUTADIENE PREPARATION (As Amended) 审中-公开
    二苯乙烯制备方法回收能量的方法（经修改）

    公开(公告)号：US20160319704A1

    公开(公告)日：2016-11-03

    申请号：US15108519

    申请日：2015-07-02

    Applicant: LG CHEM, LTD.

    Inventor： Mi Kyung KIM ,  Jeong Seok LEE ,  Jae Ik LEE ,  Dae Hyeon KIM ,  Jong Ku LEE

    IPC: F01K25/14 ,  F01D25/08 ,  F01D15/10 ,  C07C5/48 ,  F01K7/16

    CPC classification number: F01K25/14 ,  C07C5/48 ,  C07C7/00 ,  C07C7/04 ,  F01D15/10 ,  F01D25/08 ,  F01K5/00 ,  F01K7/16 ,  F05D2260/213 ,  H02N11/00

    Abstract: Provided is a method for recycling energy in process of butadiene preparation, which includes, in the process of preparing butadiene using oxidative dehydrogenation reaction, steps of: a) supplying part or all of a light gas discharged from a solvent absorption tower to a turbine to produce electricity; b) passing the light gas passed through the turbine through one or more device units provided with a heat exchanger; and c) feeding the light gas passed through the device units provided with the heat exchanger into a reactor, according to which more economical butadiene preparation process is provided, by reducing net energy value required in process of butadiene preparation using oxidative dehydrogenation reaction.

    Abstract translation: 提供了一种在丁二烯制备过程中回收能量的方法，其包括在使用氧化脱氢反应制备丁二烯的过程中，步骤：a）将从溶剂吸收塔排出的轻质气体的一部分或全部供应到涡轮机 发电; b）使通过涡轮机的轻质气体通过设置有热交换器的一个或多个装置单元; 以及c）将通过设置有热交换器的装置单元的轻质气体进料到反应器中，通过减少使用氧化脱氢反应的丁二烯制备过程中所需的净能值，从而提供更经济的丁二烯制备方法。

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