公开(公告)号：US11865522B2

公开(公告)日：2024-01-09

申请号：US17293586

申请日：2020-07-13

Applicant: LG CHEM, LTD.

Inventor： Sang Jin Han ,  Dong Hyun Ko ,  Kyong Yong Cha ,  Ye Seul Hwang ,  Sunhwan Hwang

IPC: B01J23/80 ,  B01J23/00 ,  B01J37/00 ,  B01J37/02 ,  B01J37/03 ,  B01J37/06 ,  B01J37/08 ,  C07C5/48

CPC classification number: B01J23/80 ,  B01J23/005 ,  B01J37/009 ,  B01J37/0236 ,  B01J37/031 ,  B01J37/06 ,  B01J37/08 ,  C07C5/48 ,  C07C2523/80

Abstract: A method for preparing a zinc ferrite-based catalyst comprising: obtaining a precipitate by bringing a metal precursor solution including a zinc precursor, a ferrite precursor, a solution containing an acid and water into contact with a basic aqueous solution; filtering the precipitate; drying the filtered precipitate; and firing the dried precipitate, wherein the solution containing the acid includes one or more of nitric acid (HNO3) and hydrocarbon acid.

公开(公告)号：US11247195B2

公开(公告)日：2022-02-15

申请号：US16307676

申请日：2018-04-26

Applicant: LG CHEM, LTD.

Inventor： Sang Jin Han ,  Dong Hyun Ko ,  Kyong Yong Cha ,  Jun Kyu Han ,  Sun Hwan Hwang

IPC: B01J23/60 ,  B01J23/80 ,  B01J35/00 ,  B01J37/03 ,  C01G49/06 ,  C07C5/48 ,  C07C11/167 ,  C01G49/00 ,  C01B13/36 ,  B01J23/00 ,  B01J37/04 ,  B01J23/76

Abstract: A method of preparing a catalyst for oxidative dehydrogenation that includes coprecipitation and injecting inert gas or air at a specific time point to reduce the ratio of an inactive α-Fe2O3 crystal structure, thereby improving the activity of the catalyst. Also provided is a method of performing oxidative dehydrogenation using the catalyst. When oxidative dehydrogenation of butene is performed using the catalyst, side reaction may be reduced, and selectivity for butadiene may be improved, providing butadiene with high productivity.

公开(公告)号：US11117119B2

公开(公告)日：2021-09-14

申请号：US15540425

申请日：2016-11-30

Applicant: LG CHEM, LTD.

Inventor： Myung Ji Suh ,  Yoon Jae Min ,  Dong Hyun Ko ,  Kyong Yong Cha ,  Se Won Baek ,  Jun Kyu Han

IPC: B01J21/00 ,  B01J29/00 ,  B01J23/889 ,  B01J23/78 ,  B01J23/80 ,  B01J37/00 ,  B01J21/12 ,  B01J23/00 ,  B01J37/03 ,  B01J35/00 ,  B01J35/04 ,  B01J21/16 ,  B01J35/10 ,  B01J37/08 ,  C07C5/48

Abstract: The present invention relates to a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, the present invention provides a catalyst for oxidative dehydrogenation having a porous structure which may easily control heat generation due to high-temperature and high-pressure reaction conditions and side reaction due to the porous structure and thus exhibits superior product selectivity, and a method of preparing the catalyst.

公开(公告)号：US11040335B2

公开(公告)日：2021-06-22

申请号：US16480977

申请日：2018-12-19

Applicant: LG CHEM, LTD.

Inventor： Jun Kyu Han ,  Dong Hyun Ko ,  Kyong Yong Cha ,  Sang Jin Han ,  Sunhwan Hwang ,  Seongmin Kim

IPC: B01J23/80 ,  B01J37/03 ,  B01J37/08 ,  C07C5/48 ,  C07C11/167

Abstract: Provided is a method for producing a zinc ferrite catalyst, the method comprising: preparing a zinc precursor solution; preparing a ferrite precursor solution; obtaining a first precipitate by bringing the zinc precursor solution into contact with an alkaline solution; obtaining a second precipitate by adding the ferrite precursor solution to the first precipitate; and drying and firing the second precipitate after filtering the second precipitate.

公开(公告)号：US11008274B2

公开(公告)日：2021-05-18

申请号：US17041259

申请日：2019-07-10

Applicant: LG CHEM, LTD.

Inventor： Min Ji Choi ,  Sungshik Eom ,  Dawon Jung ,  Tae Yun Kim ,  Dong Hyun Ko ,  Mi Young Kim

IPC: C07C45/64 ,  C07C29/00 ,  C07C29/153

Abstract: A method for preparing dimethylolbutanal including performing an aldol reaction of n-butyraldehyde (n-BAL) and paraformaldehyde (PFA) in the presence of water and an alkylamine catalyst, in which a weight ratio of the paraformaldehyde:water is 1:0.35 to 1:0.85.

公开(公告)号：US10994265B2

公开(公告)日：2021-05-04

申请号：US16477866

申请日：2018-11-27

Applicant: LG CHEM, LTD.

Inventor： Myungji Suh ,  Dong Hyun Ko ,  Kyong Yong Cha

IPC: B01J23/80 ,  B01J21/04 ,  B01J35/00 ,  B01J35/10 ,  B01J37/02 ,  C07C5/48

Abstract: Provided is a catalyst system for oxidative dehydrogenation, a reactor for preparing butadiene including the catalyst system, and a method of preparing 1,3-butadiene. In the catalyst system for oxidative dehydrogenation, a coating catalyst is diluted with a specific dilution filler and a reactor is filled with the diluted catalyst, or a reactor is filled with a catalyst for oxidative dehydrogenation so that the concentration of an active ingredient included in the catalyst gradually increases in the direction from reactants inlet in which reactants are fed into the reactor to products outlet. The catalyst system for oxidative dehydrogenation can efficiently control heat generated inside a reactor, thereby improving conversion rate, selectivity, yield, and long-term stability of a catalyst.

公开(公告)号：US10994262B2

公开(公告)日：2021-05-04

申请号：US15765445

申请日：2017-05-18

Applicant: LG CHEM, LTD.

Inventor： Seongmin Kim ,  Dong Hyun Ko ,  Kyong Yong Cha ,  Dae Heung Choi ,  Myung Ji Suh ,  Jun Kyu Han ,  Sun Hwan Hwang ,  Jun Han Kang ,  Joo Hyuck Lee ,  Hyun Seok Nam ,  Ye Seul Hwang ,  Sang Jin Han

IPC: B01J23/00 ,  B01J23/72 ,  B01J23/745 ,  B01J23/75 ,  B01J23/755 ,  B01J23/78 ,  B01J23/825 ,  B01J23/83 ,  B01J23/847 ,  B01J23/86 ,  B01J23/889 ,  B01J21/04 ,  B01J27/224 ,  B01J37/02 ,  C07C5/48 ,  C07C11/167 ,  B01J35/02 ,  B01J23/02 ,  B01J23/26 ,  B01J37/00 ,  B01J23/22 ,  B01J37/08 ,  B01J23/34 ,  B01J23/10 ,  B01J23/08 ,  B82Y40/00 ,  B82Y30/00 ,  B01J35/00 ,  B01J23/80 ,  B01J23/06 ,  B01J21/06 ,  B01J21/08 ,  B01J21/16 ,  B01J27/24 ,  B01J35/08

Abstract: Disclosed are a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, a catalyst for oxidative dehydrogenation of butene having a high butene conversion rate and superior side reaction inhibition effect and thus having high reactivity and high selectivity for a product by preparing metal oxide nanoparticles and then fixing the prepared metal oxide nanoparticles to a support, and a method of preparing the same are provided.

公开(公告)号：US10913700B2

公开(公告)日：2021-02-09

申请号：US16769187

申请日：2019-01-24

Applicant: LG CHEM, LTD.

Inventor： Sungshik Eom ,  Dawon Jung ,  Tae Youn Kim ,  Dong Hyun Ko ,  Mi Young Kim ,  Min Ji Choi ,  Taewoo Kim

IPC: C07C45/83 ,  B01D3/00 ,  B01D3/32 ,  B01D3/14

Abstract: A method for producing dimethylolbutanal, the method including: (A) distilling a raw material comprising dimethylolbutanal (DMB) in a distillation column; (B) separating the distilled raw material in the distillation column into a low boiling point component, dimethylolbutanal, and a high boiling point component; and (C) refluxing a portion or all of the high boiling point component to the distillation column by heating the portion or all of the high boiling point component, in which the dimethylolbutanal is separated from a side cut of the distillation column.

公开(公告)号：US20200369588A1

公开(公告)日：2020-11-26

申请号：US16769187

申请日：2019-01-24

Applicant: LG CHEM, LTD.

Inventor： Sungshik Eom ,  Dawon Jung ,  Tae Youn Kim ,  Dong Hyun Ko ,  Mi Young Kim ,  Min Ji Choi ,  Taewoo Kim

IPC: C07C45/83 ,  B01D3/14 ,  B01D3/32 ,  B01D3/00

Abstract: A method for producing dimethylolbutanal, the method including: (A) distilling a raw material comprising dimethylolbutanal (DMB) in a distillation column; (B) separating the distilled raw material in the distillation column into a low boiling point component, dimethylolbutanal, and a high boiling point component; and (C) refluxing a portion or all of the high boiling point component to the distillation column by heating the portion or all of the high boiling point component, in which the dimethylolbutanal is separated from a side cut of the distillation column.

公开(公告)号：US10543478B2

公开(公告)日：2020-01-28

申请号：US15570187

申请日：2017-03-07

Applicant: LG CHEM, LTD.

Inventor： Kyong Yong Cha ,  Myung Ji Suh ,  Dong Hyun Ko ,  Dae Heung Choi ,  Ye Seul Hwang ,  Jun Kyu Han ,  Sun Hwan Hwang ,  Seong Min Kim

IPC: B01J21/10 ,  B01J23/00 ,  B01J23/02 ,  B01J23/06 ,  B01J23/10 ,  B01J23/34 ,  B01J23/72 ,  B01J23/745 ,  B01J23/78 ,  B01J23/80 ,  B01J23/889 ,  B01J37/00 ,  C07C1/22 ,  C07C1/24

Abstract: The present invention relates to a method of preparing a catalyst for oxidative dehydrogenation. More particularly, the method of preparing a catalyst for oxidative dehydrogenation includes a first step of preparing an aqueous iron-metal precursor solution by dissolving a trivalent cation iron (Fe) precursor and a divalent cation metal (A) precursor in distilled water; a second step of obtaining a slurry of an iron-metal oxide by reacting the aqueous iron-metal precursor solution with ammonia water in a coprecipitation bath to form an iron-metal oxide (step b) and then filtering the iron-metal oxide; and a third step of heating the iron-metal oxide slurry.In accordance with the present invention, a metal oxide catalyst, as a catalyst for oxidative dehydrogenation, having a high spinel phase structure proportion may be economically prepared by a simple process.