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公开(公告)号：US20190118168A1
公开(公告)日：2019-04-25
申请号：US16091091
申请日：2017-08-01
Applicant: LG CHEM, LTD.
Inventor： Ji Yeon KIM , Jun Seon CHOI , Joo Young CHEON , Wang Rae JOE , Kyung Soo KIM
CPC classification number: B01J27/16 , B01J21/066 , B01J27/18 , B01J35/002 , B01J35/1009 , B01J35/1019 , B01J35/1061 , B01J37/00 , B01J37/03 , B01J37/031 , B01J37/04 , B01J37/06 , B01J37/08 , C07D207/444 , C07D207/448
Abstract: A dehydration catalyst for preparing N-substituted maleimide, which may minimize formation of by-products, is reusable because its activity is not reduced significantly even after being reused several times, and may maintain its reaction activity for a long time, a preparation method thereof, and a method of preparing N-substituted maleimide, are provided.
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2.发明申请公开(公告)号：US20170304804A1
公开(公告)日：2017-10-26
申请号：US15520382
申请日：2015-12-08
Applicant: LG Chem, Ltd.
Inventor： Ji YEON KIM , Jun Seon CHOI , Joo Young CHEON , Wang Rae JOE , Hye Jeong OK , Kyung Soo KIM
IPC: B01J21/06 , C07C45/52 , B01J37/03 , B01J27/195 , B01J27/185 , B01J27/16 , B01J27/18 , C07C47/22 , B01J27/188
CPC classification number: B01J21/066 , B01J27/16 , B01J27/1802 , B01J27/1806 , B01J27/1808 , B01J27/1817 , B01J27/1853 , B01J27/1856 , B01J27/188 , B01J27/195 , B01J37/03 , B01J37/033 , B01J2523/00 , C07C45/52 , C07C47/22 , B01J2523/22 , B01J2523/48 , B01J2523/51 , B01J2523/69 , B01J2523/23 , B01J2523/13 , B01J2523/305 , B01J2523/842 , B01J2523/55 , B01J2523/27 , B01J2523/18 , B01J2523/56
Abstract: The present invention relates to: a catalyst for glycerin dehydration; a preparation method therefor; and an acrolein preparation method using the catalyst. According to one embodiment of the present invention, the catalyst is used in glycerin dehydration so as to exhibit high catalytic activity, a high yield and high acrolein selectivity, and has a characteristic in which carbon is not readily deposited, thereby having a long lifetime compared with that of a conventional catalyst.
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公开(公告)号：US20190152910A1
公开(公告)日：2019-05-23
申请号：US16091475
申请日：2017-11-06
Applicant: LG CHEM, LTD.
Inventor： Joo Young CHEON , Jun Seon CHOI , Ji Yeon KIM , Wang Rae JOE , Kyung Soo KIM , Eung Seob YEOM , Won Kyun LEE
IPC: C07D207/452 , B01J27/16 , B01J27/28
Abstract: The present invention relates to a synthesis method of N-substituted maleimides using a non-homogeneous solid acid catalyst, and particularly, a synthesis method of N-substituted maleimides with high synthesis yield by using a zirconium(IV) hydrogen phosphate as a catalyst, by which, the loss of the catalyst is minimized, the separation and recovering processes of the catalyst are simplified, in case when the activity of the separated and recovered catalyst is decreased, the complete regeneration of the catalyst is possible via washing or firing, and solvents that could be used during a washing process of the catalyst are not limited.
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公开(公告)号：US20180273460A1
公开(公告)日：2018-09-27
申请号：US15762868
申请日：2016-12-15
Applicant: LG CHEM, LTD.
Inventor： Kyung Soo KIM , Jun Seon CHOI , Ji Yeon KIM , Joo Young CHEON , Wang Rae JOE , Hye Jeong OK
IPC: C07C51/25 , C07C45/52 , B01J27/198 , B01J23/888
CPC classification number: C07C51/252 , B01J23/8885 , B01J27/198 , C07C45/52 , C07C47/22 , C07C57/04
Abstract: The present invention relates to a method for preparing acrylic acid from glycerin. More specifically, the present invention provides a method which can improve the selectivity of acrolein by applying a specific catalyst composition and process conditions to minimize the generation of coke carbon of the catalyst, and can prepare acrylic acid with higher productivity for a longer duration of time because a dehydration reaction can be performed for a longer working period while maintaining catalyst activity at a high level during the reaction.
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公开(公告)号：US20210355083A1
公开(公告)日：2021-11-18
申请号：US16336084
申请日：2018-07-09
Applicant: LG CHEM, LTD.
Inventor： Eun Kyo KIM , Jeong Seok LEE , Mi Kyung KIM , Joo Young CHEON
IPC: C07D207/444 , C08F222/40 , C08F2/01
Abstract: The present invention relates to a method for purifying N-substituted maleimide. More particularly, the present invention adopts an evaporation apparatus, which can previously remove impurities having higher boiling points than the N-substituted maleimide after removing an organic solvent from an N-substituted maleimide resulting solution, thereby achieving effects of minimizing the pressure loss and polymerization loss, and obtaining high-purity N-substituted maleimide.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20150343430A1
公开(公告)日：2015-12-03
申请号：US14653670
申请日：2014-11-18
Applicant: LG CHEM, LTD.
Inventor： Ji Yeon KIM , Jun Seon CHOI , Joo Young CHEON , Wang Rae JOE
CPC classification number: B01J29/46 , B01J27/053 , B01J27/055 , B01J29/072 , B01J29/40 , B01J29/405 , B01J29/42 , B01J29/7007 , B01J29/7057 , B01J29/7215 , B01J29/7615 , B01J35/0006 , B01J37/0036 , B01J37/04 , B01J2229/20 , C07C45/52 , C07C47/22
Abstract: The present invention relates to a catalyst for glycerin dehydration, a preparation method thereof, and a preparation method of acrolein. The catalyst for glycerin dehydration exhibits a high glycerin conversion ratio, minimizes by-product formation to improve acrolein selectivity, and also maintains high catalytic activity during reaction.
Abstract translation: 本发明涉及一种用于甘油脱水的催化剂及其制备方法和丙烯醛的制备方法。 用于甘油脱水的催化剂显示出高甘油转化率，使副产物形成最小化以改善丙烯醛选择性，并且还在反应期间保持高的催化活性。
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7.发明申请METHOD FOR PREPARING CATALYST FOR GLYCERIN DEHYDRATION, AND METHOD FOR PREPARING ACROLEIN 有权甘氨酸脱氢催化剂的制备方法及其制备方法公开(公告)号：US20160030929A1
公开(公告)日：2016-02-04
申请号：US14432005
申请日：2014-06-20
Applicant: LG CHEM, LTD.
Inventor： Wang Rae JOE , Jun Seon CHOI , Ji Yeon KIM , Joo Young CHEON
IPC: B01J27/182 , C07C45/51 , B01J37/08 , C01B25/37 , B01J37/28
CPC classification number: B01J27/182 , B01J23/10 , B01J37/036 , B01J37/08 , B01J37/28 , C01B25/37 , C07C45/512 , C07C45/52 , C07C47/22
Abstract: The present invention relates to a method for preparing a catalyst for glycerin dehydration, a catalyst for glycerin dehydration prepared thereby, and a method for preparing acrolein. More particularly, the catalyst for glycerin dehydration prepared by the preparation method is able to minimize by-product formation to improve acrolein selectivity and to maintain high catalytic activity during the reaction.
Abstract translation: 本发明涉及一种甘油脱水催化剂的制备方法，由此制备的甘油脱水催化剂及其制备方法。 更具体地，通过制备方法制备的用于甘油脱水的催化剂能够使副产物形成最小化，以提高丙烯醛选择性并在反应期间保持高的催化活性。
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8.发明申请CATALYST FOR GLYCERIN DEHYDRATION, PREPARATION METHOD THEREOF, AND PREPARATION METHOD OF ACROLEIN (As Amended) 有权甘氨酸脱水催化剂及其制备方法及其制备方法（已修改）公开(公告)号：US20150336087A1
公开(公告)日：2015-11-26
申请号：US14442992
申请日：2014-06-20
Applicant: LG CHEM, LTD.
Inventor： Wang Rae JOE , Jun Seon CHOI , Ji Yeon KIM , Joo Young CHEON
IPC: B01J27/188 , C07C45/52 , B01J37/08
CPC classification number: B01J27/188 , B01J23/888 , B01J27/199 , B01J37/08 , B01J2523/00 , C07C45/52 , C07C47/22 , B01J2523/17 , B01J2523/51 , B01J2523/69 , B01J2523/41
Abstract: The present invention relates to a catalyst for glycerin dehydration, a preparation method thereof, and a preparation method of acrolein, and more particularly, to a catalyst for glycerin dehydration which minimizes by-product formation to improve acrolein selectivity and maintains high catalytic activity during reaction.
Abstract translation: 本发明涉及一种用于甘油脱水的催化剂及其制备方法和丙烯醛的制备方法，更具体地说，涉及用于甘油脱水的催化剂，其使副产物形成最小化以改善丙烯醛选择性并在反应期间维持高的催化活性 。
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9.发明申请公开(公告)号：US20220258132A1
公开(公告)日：2022-08-18
申请号：US17424815
申请日：2020-11-16
Applicant: LG CHEM, LTD.
Inventor： Hyeon Bin KIM , Joo Young CHEON , Young Sub KEUM , Dae Heung CHOI
Abstract: The present disclosure relates to a dehydration catalyst, a method for preparing the same, and a method for preparing an alkene using the same. More particularly, the present invention relates to a dehydration catalyst that is mixed-phase alumina including 1 to 18% by weight of alpha-alumina, 65 to 95% by weight of theta-alumina, and 4 to 34% by weight of delta-alumina, a method for preparing the dehydration catalyst, and a method for preparing an alkene using the dehydration catalyst.
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公开(公告)号：US20200207710A1
公开(公告)日：2020-07-02
申请号：US16615015
申请日：2018-08-29
Applicant: LG CHEM, LTD.
Inventor： Joo Young CHEON , Jun Seon CHOI , Ji Yeon KIM , Ki Hyuk KANG
IPC: C07D207/448
Abstract: The present invention relates to a method for purifying N-substituted maleimide. More specifically, the present invention, without performing a water washing process, enables to remove organic-acid-impurities which are difficult to remove through distillation because of having similar boiling points to the N-substituted maleimide compound by utilizing solubility of organic-acid-impurities in an organic solvent used in the preparing process of the maleimide compound, and thereby, without producing washing wastewater, ensuring removal efficiency of the organic-acid-impurities equal to or similar to an N-substituted maleimide compound subjected to a water washing process.
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