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公开(公告)号：US20220348536A1
公开(公告)日：2022-11-03
申请号：US17628717
申请日：2021-07-09
Applicant: LG CHEM, LTD.
Inventor： Sang Cheol SHIN , Jun Seok KO , Yong Heon CHO , Joon Ho SHIN
IPC: C07C253/34 , C07C253/02
Abstract: Disclosed is a recovery method of a nitrile-based monomer including: supplying a feed stream including a nitrile-based monomer, a nitrogen compound, and water to a first distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; condensing the upper discharge stream of the first distillation tower and supplying the condensed stream to a decanter to separate the stream into a water layer and an organic layer; supplying an organic layer stream discharged from the decanter to a second distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; and splitting a part of the upper discharge stream from the second distillation tower and refluxing the split stream to the second distillation tower.
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公开(公告)号：US20210340318A1
公开(公告)日：2021-11-04
申请号：US17273650
申请日：2020-07-07
Applicant: LG CHEM, LTD.
Inventor： Woosung HWANG , Dongmin KIM , Seung Young PARK , Mi Kyung KIM , Joon Ho SHIN , Wonseok KIM
Abstract: The present disclosure relates to a method for preparing a polyalkylene carbonate. More specifically, provided is a method for preparing a polyalkylene carbonate in which after polymerization of polyalkylene carbonate, a mixture from which unreacted carbon dioxide and residual catalyst have been removed is charged into a stripper to remove the unreacted epoxide compound, and then heat-exchanged before removing the solvent to increase the temperature of the mixture stream to the maximum level, which is subjected to a heating step, following by a solvent removal step, whereby the amount of steam required in the heating step is reduced, side reactions due to unreacted epoxide compounds are prevented, and steam energy can be reduced in the solvent removal step.
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公开(公告)号：US20200071244A1
公开(公告)日：2020-03-05
申请号：US16613752
申请日：2017-11-21
Applicant: LG CHEM, LTD.
Inventor： Tae Woo KIM , Sung Kyu LEE , Joon Ho SHIN , Yeonuk CHOO
Abstract: The present invention provides an ethylene separation process comprising an first and second deethanizer columns and an acetylene converter, thereby providing an ethylene stream having a purity of 99 wt % or more to the middle of an ethylene separation column. The present invention increases the production amount of ethylene and also reduces energy consumption by passing the feed through a preliminary ethylene separation process, without having to change existing facilities in which an acetylene converter is provided downstream of the deethanizer column.
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公开(公告)号：US20190023634A1
公开(公告)日：2019-01-24
申请号：US16071553
申请日：2017-11-10
Applicant: LG CHEM, LTD.
Inventor： Si Nae LEE , Sung Kyu LEE , Joon Ho SHIN
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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公开(公告)号：US20170190808A1
公开(公告)日：2017-07-06
申请号：US15313890
申请日：2015-05-28
Applicant: LG CHEM, LTD.
Inventor： Chang Hoe HEO , Eun Jung JOO , Dae Young SHIN , Joon Ho SHIN
Abstract: The present application relates to a method for removing an unreacted vinyl chloride monomer (VCM) in polyvinyl chloride (PVC). According to an illustrative stripping apparatus and a stripping method using the stripping apparatus of the present application, in a stripping process using steam, a temperature difference between a raw material including a target substance to be removed and steam is minimized to suppress foam generation in the stripping process, thereby increasing efficiency of removing the target substance to be removed, particularly, an unreacted VCM in PVC. In addition, a cleansing cycle to remove foams generated in the stripping apparatus can be reduced, thereby not only securing economic feasibility of the process, but also preventing degradation in quality of a final product that may occur when an antifoamer to remove the foams is used.
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Patent Agency Ranking
公开(公告)号：US20160231062A1
公开(公告)日：2016-08-11
申请号：US15022191
申请日：2014-09-17
Applicant: LG CHEM, LTD.
Inventor： Tae Woo KIM , Sung Kyu LEE , Joon Ho SHIN
CPC classification number: B01J19/0053 , B01J10/00 , B01J19/0013 , B01J19/24 , B01J2219/00029 , B01J2219/00103 , B01J2219/00108
Abstract: Disclosed are a heat recovery device and a heat recovery method. According to the heat recovery device, it is possible to recovery heat which is discontinuously generated in a batch reactor. In addition, a heat-exchanged heat exchange medium is supplied to a heat storage facility so that various kinds and a great quantity of steams can be produced, if necessary, thereby utilizing these produced steams in various industrial fields.
Abstract translation: 公开了一种热回收装置和热回收方法。 根据热回收装置，可以回收在间歇式反应器中不连续产生的热量。 此外，热交换介质被供给到蓄热设备，如果需要，可以生产各种和大量的蒸汽，从而在各种工业领域中利用这些生产的蒸汽。
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公开(公告)号：US20160207858A1
公开(公告)日：2016-07-21
申请号：US14912835
申请日：2014-08-20
Applicant: LG CHEM, LTD.
Inventor： Jong Suh PARK , Sung Kyu LEE , Joon Ho SHIN , Jong Ku LEE
CPC classification number: C07C29/76 , B01D3/141 , B01D3/145 , B01D61/362 , B01D2311/2669 , C07C29/80 , C07C31/10
Abstract: Provided are a method of and a device for purifying isopropyl alcohol. Water may be effectively removed from a feed including water and isopropyl alcohol while consuming a minimum amount of energy, and therefore, a high-purity isopropyl alcohol may be obtained.
Abstract translation: 提供异丙醇的纯化方法和装置。 水可以有效地从含有水和异丙醇的进料中除去，同时消耗最少量的能量，因此可以获得高纯度异丙醇。
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公开(公告)号：US20160193541A1
公开(公告)日：2016-07-07
申请号：US14905618
申请日：2014-07-18
Applicant: LG CHEM, LTD.
Inventor： Sung Kyu LEE , Joon Ho SHIN , Sung Kyun KIM , Jong Ku LEE
CPC classification number: B01D3/141 , B01D3/008 , B01D3/14 , B01D3/143 , B01D3/32 , C07C41/42 , C07C67/54 , C07C69/54
Abstract: The present application relates to a distillation apparatus and a separation method, and according to the distillation apparatus and the separation method of the present application, it is possible to separate a material to be separated during the separation of a mixture of three or more components, for example, 2-ethylhexyl acrylate with high purity, and to achieve an object of saving energy during the separation and purification process of 2-ethylhexyl acrylate.
Abstract translation: 本申请涉及蒸馏装置和分离方法，并且根据本申请的蒸馏装置和分离方法，可以在三种或更多种组分的混合物分离期间分离待分离的材料， 例如具有高纯度的丙烯酸2-乙基己酯，并且在丙烯酸2-乙基己酯的分离和纯化过程中达到节能的目的。
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公开(公告)号：US20230174451A1
公开(公告)日：2023-06-08
申请号：US17921689
申请日：2021-10-27
Applicant: LG CHEM, LTD.
Inventor： Hyebin KIM , Mi Kyung KIM , Eunkyo KIM , Joon Ho SHIN
IPC: C07C51/44 , C07C51/377 , C07C51/47
CPC classification number: C07C51/44 , C07C51/377 , C07C51/47
Abstract: Provided is a process for producing acrylic acid, comprising (step 1) separating a first low-boiling-point material including acetaldehyde (ACHO) and a first high-boiling-point material including acrylic acid (AA) by adding a first absorbent to a reaction product of a bio-raw material and cooling the result; (step 2) separating a first incompressible material and a second low-boiling-point material including acetaldehyde (ACHO) by adding a second absorbent to the first low-boiling-point material including acetaldehyde (ACHO) and cooling the result; (step 3) heating the second low-boiling-point material including acetaldehyde (ACHO); (step 4) separating the heated second low-boiling-point material including acetaldehyde (ACHO) to acetaldehyde (ACHO) and the second absorbent and (step 5) producing acrylic acid by purifying the first high-boiling-point material including acrylic acid (AA).
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公开(公告)号：US20230167044A1
公开(公告)日：2023-06-01
申请号：US17921168
申请日：2021-10-27
Applicant: LG CHEM, LTD.
Inventor： Eunkyo KIM , Mi Kyung KIM , Joon Ho SHIN , Hyebin KIM
IPC: C07C51/487
CPC classification number: C07C51/487
Abstract: Provided is a process for producing acrylic acid, the process comprising: (step 1) preparing a first aqueous lactic acid solution by diluting a lactic acid raw material with water; (step 2) heat exchanging the first aqueous lactic acid solution to form a vaporized second lactic acid vapor and an unvaporized third aqueous lactic acid solution; (step 3) including the unvaporized third aqueous lactic acid solution in the aqueous solution of the step 1; and (step 4) supplying and absorbing an absorption liquid to the vaporized second lactic acid vapor to form an absorbed fourth aqueous lactic acid solution and an unabsorbed fifth lactic acid vapor, wherein the absorption liquid is water or an aqueous lactic acid solution.
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