公开(公告)号：US10435347B2

公开(公告)日：2019-10-08

申请号：US15762868

申请日：2016-12-15

申请人： LG CHEM, LTD.

发明人： Kyung Soo Kim ,  Jun Seon Choi ,  Ji Yeon Kim ,  Joo Young Cheon ,  Wang Rae Joe ,  Hye Jeong Ok

IPC分类号： C07C51/25 ,  C07C45/52 ,  B01J23/888 ,  B01J27/198

摘要： 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.

公开(公告)号：US09861957B2

公开(公告)日：2018-01-09

申请号：US15520382

申请日：2015-12-08

申请人： LG CHEM, LTD.

发明人： Ji Yeon Kim ,  Jun Seon Choi ,  Joo Young Cheon ,  Wang Rae Joe ,  Hye Jeong Ok ,  Kyung Soo Kim

IPC分类号： C07C45/52 ,  B01J37/00 ,  B01J27/00 ,  B01J21/06 ,  B01J27/16 ,  B01J27/18 ,  B01J27/185 ,  B01J27/188 ,  B01J27/195 ,  B01J37/03 ,  C07C47/22

摘要： 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.

公开(公告)号：US09527065B2

公开(公告)日：2016-12-27

申请号：US14653670

申请日：2014-11-18

申请人： LG CHEM, LTD.

发明人： Ji Yeon Kim ,  Jun Seon Choi ,  Joo Young Cheon ,  Wang Rae Joe

IPC分类号： C07C45/52 ,  B01J29/46 ,  B01J29/76 ,  B01J29/072 ,  B01J37/04 ,  B01J27/053 ,  B01J27/055 ,  B01J29/42 ,  B01J29/72 ,  B01J37/00 ,  B01J35/00 ,  B01J29/40 ,  B01J29/70

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US09327276B2

公开(公告)日：2016-05-03

申请号：US14440270

申请日：2014-07-15

申请人： LG CHEM, LTD.

发明人： Jun Seon Choi ,  Ji Yeon Kim ,  Joo Young Cheon ,  Wang Rae Joe

IPC分类号： C07C45/29 ,  B01J37/00 ,  B01J27/00 ,  B01J27/195 ,  C07C29/60 ,  C07C45/52 ,  B01J37/02 ,  B01J37/08 ,  B01J27/053 ,  B01J27/055 ,  B01J27/188 ,  B01J37/04 ,  B01J37/20 ,  B01J37/28

CPC分类号： B01J27/195 ,  B01J27/053 ,  B01J27/055 ,  B01J27/188 ,  B01J37/0236 ,  B01J37/04 ,  B01J37/08 ,  B01J37/20 ,  B01J37/28 ,  B01J2523/00 ,  C07C29/60 ,  C07C45/29 ,  C07C45/52 ,  C07C31/225 ,  C07C47/22 ,  B01J2523/17 ,  B01J2523/62 ,  B01J2523/69 ,  B01J2523/305 ,  B01J2523/51 ,  B01J2523/56 ,  B01J2523/3712

摘要： 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 during glycerin dehydration to improve acrolein selectivity and maintains high catalytic activity during reaction.

摘要翻译： 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，涉及甘油脱水催化剂，其使甘油脱水期间的副产物形成最小化以改善丙烯醛选择性并保持高催化性 反应过程中的活性。

公开(公告)号：US11975308B2

公开(公告)日：2024-05-07

申请号：US17424815

申请日：2020-11-16

申请人： LG CHEM, LTD.

发明人： Hyeon Bin Kim ,  Joo Young Cheon ,  Young Sub Keum ,  Dae Heung Choi

IPC分类号： B01J21/04 ,  B01J21/00 ,  B01J35/61 ,  B01J35/63 ,  B01J37/08 ,  B01J37/10 ,  C07C1/24

CPC分类号： B01J21/04 ,  B01J35/613 ,  B01J35/633 ,  B01J35/635 ,  B01J37/082 ,  B01J37/10 ,  C07C1/24 ,  C07C2521/04

摘要： 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.

公开(公告)号：US10464050B2

公开(公告)日：2019-11-05

申请号：US16091091

申请日：2017-08-01

申请人： LG CHEM, LTD.

发明人： Ji Yeon Kim ,  Jun Seon Choi ,  Joo Young Cheon ,  Wang Rae Joe ,  Kyung Soo Kim

IPC分类号： B01J27/16 ,  B01J37/03 ,  C07D207/448 ,  B01J37/04 ,  B01J37/08 ,  B01J37/06

摘要： 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.

公开(公告)号：US10046307B2

公开(公告)日：2018-08-14

申请号：US15520382

申请日：2015-12-08

申请人： LG CHEM, LTD.

发明人： Ji Yeon Kim ,  Jun Seon Choi ,  Joo Young Cheon ,  Wang Rae Joe ,  Hye Jeong Ok ,  Kyung Soo Kim

IPC分类号： C07C45/52 ,  B01J37/00 ,  B01J27/00 ,  B01J21/06 ,  B01J27/16 ,  B01J27/18 ,  B01J27/185 ,  B01J27/188 ,  B01J27/195 ,  B01J37/03 ,  C07C47/22

摘要： 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.

公开(公告)号：US11345661B2

公开(公告)日：2022-05-31

申请号：US16336084

申请日：2018-07-09

申请人： LG CHEM, LTD.

发明人： Eun Kyo Kim ,  Jeong Seok Lee ,  Mi Kyung Kim ,  Joo Young Cheon

IPC分类号： C07D207/444 ,  C08F222/40 ,  C08F2/01

摘要： 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.

公开(公告)号：US20210387152A1

公开(公告)日：2021-12-16

申请号：US17274737

申请日：2020-08-12

申请人： LG CHEM, LTD.

发明人： Joo Young Cheon ,  Dong Hyun Ko ,  Jun Han Kang ,  Sang Jin Han ,  Hyun Jin Cho ,  Jae Kwon Jeoung

IPC分类号： B01J8/06

摘要： A socket-type fluid distributor for distributing and supplying a gas and/or liquid reactant into a reactor body. The socket-type fluid distributor includes: a distributor body, a bottom portion of which is inserted into the reactor body; a mixing flow path formed in a central portion of the distributor body such that the mixing flow path penetrates through the distributor body into the reactor body; a gas reactant input portion disposed above the distributor body and having a gas flow path; a liquid reactant input portion disposed between the distributor body and the gas reactant input portion and having a liquid flow path; and a flow control portion formed in the mixing flow path.

公开(公告)号：US10899708B2

公开(公告)日：2021-01-26

申请号：US16615015

申请日：2018-08-29

申请人： LG CHEM, LTD.

发明人： Joo Young Cheon ,  Jun Seon Choi ,  Ji Yeon Kim ,  Ki Hyuk Kang

IPC分类号： C07D207/448

摘要： 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.