公开(公告)号：US20180237372A1

公开(公告)日：2018-08-23

申请号：US15752181

申请日：2017-01-31

Applicant: LG CHEM, LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Jae LEE ,  Dong Su SONG ,  Yong Jin CHOE ,  Hyun Joo LEE ,  Min Su KIM

IPC: C07C51/25 ,  C07C51/44 ,  C07C51/50 ,  B01J23/44 ,  B01J23/52

CPC classification number: C07C51/25 ,  B01J23/44 ,  B01J23/46 ,  B01J23/52 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/682 ,  B01J23/685 ,  B01J23/686 ,  B01J23/688 ,  B01J23/74 ,  B01J23/78 ,  B01J23/80 ,  B01J23/89 ,  B01J23/8906 ,  B01J23/8913 ,  B01J23/892 ,  B01J23/8946 ,  B01J23/8953 ,  B01J35/0013 ,  B01J35/006 ,  B01J35/023 ,  B01J35/08 ,  B01J37/0072 ,  B01J37/009 ,  B01J37/0211 ,  B01J37/16 ,  B01J2523/00 ,  C07C51/44 ,  C07C51/50 ,  C07C57/04 ,  B01J2523/19 ,  B01J2523/22 ,  B01J2523/824

Abstract: A method for preparing acrylic acid, more specifically, to a method for preparing acrylic acid under a neutral condition at high yield in a short time without using a base, unlike the prior art in which a base is essentially used. The acrylic acid is produced using a supported catalyst having a specific composition when preparing acrylic acid by oxidation of allyl alcohol. Particularly, the preparation method can recover acrylic acid rather than acrylic acid salt as a final product, and thus has an advantage that the overall process cost can be reduced by eliminating essential processes in the prior art, such as ion exchange after the acidification process required for the conversion of acrylic acid salt to acrylic acid.

公开(公告)号：US20240058794A1

公开(公告)日：2024-02-22

申请号：US18231842

申请日：2023-08-09

Applicant: Korea Advanced Institute of Science and Technology ,  POSTECH Research and Business Development Foundation

Inventor： Hyun Joo LEE ,  Gun Joo KIM ,  Yong Tae KIM

IPC: B01J23/83 ,  B01J23/72 ,  B01J35/00 ,  B01J35/02 ,  B01J37/03 ,  B01J6/00 ,  B01J37/04

CPC classification number: B01J23/83 ,  B01J23/72 ,  B01J35/0006 ,  B01J35/026 ,  B01J37/031 ,  B01J6/001 ,  B01J37/04

Abstract: The present disclosure relates to a copper-based catalyst for reverse water gas reaction including a gas-permeable amorphous shell formed by strong metal-support interaction. The inventors of the present disclosure synthesized a copper-ceria solid solution and then adjusted the surface defect sites of the solid solution, thereby producing a catalyst including enhanced surface defect sites and having a gas-permeable amorphous shell structure formed on each copper particle. When the catalyst production method according to the present disclosure is used, it is possible to synthesize a catalyst including a structure consisting only of very small Cu particles encapsulated by surface shells and Cu sites incorporated into the CeO2 lattice structure. When the synthesized catalyst is used in the RWGS reaction, it exhibits excellent low-temperature activity, high activity and durability, compared to conventional precious metal catalysts. In addition, even when the catalyst of the present disclosure is supported on a monolith and used to perform the RWGS reaction on a bench scale, it exhibits high activity, CO2 conversion and durability, which are comparable with those in the laboratory scale, indicating that it may be applied to an actual process.