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.

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.

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

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

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.

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.

公开(公告)号：US20180257063A1

公开(公告)日：2018-09-13

申请号：US15749472

申请日：2016-12-15

Applicant: LG CHEM. LTD.

Inventor： Jun Seon CHOI ,  Ji Yeon KIM ,  Joo Young CHEON ,  Wang Rae JOE ,  Hye Jeong OK ,  Kyung Soo KIM

IPC: B01J27/18 ,  B01J37/08 ,  C07C47/22 ,  C07C45/52

CPC classification number: B01J27/1808 ,  B01J23/002 ,  B01J27/1853 ,  B01J27/188 ,  B01J27/195 ,  B01J35/1014 ,  B01J35/1019 ,  B01J37/031 ,  B01J37/06 ,  B01J37/08 ,  B01J37/088 ,  B01J2523/00 ,  C07C45/52 ,  C07C47/22 ,  B01J2523/48 ,  B01J2523/51 ,  B01J2523/69 ,  B01J2523/842 ,  B01J2523/55 ,  B01J2523/27 ,  B01J2523/56

Abstract: The present disclosure relates to a catalyst for dehydration of glycerin, a preparation method thereof, and a production method of acrolein using the catalyst.Particularly, the catalyst according to an embodiment of the present disclosure is used in a dehydration reaction of glycerin to exhibit high catalytic activity, a high yield, and high selectivity to acrolein and acrylic acid, and has a longer lifetime compared to the conventional catalysts due to a characteristic that coke carbon cannot be easily deposited on the surface of the catalyst.