公开(公告)号：US20230330635A1

公开(公告)日：2023-10-19

申请号：US17914042

申请日：2021-03-03

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Koji TAKIZAWA ,  Fiona MUKHERJEE ,  Kenichi SHINMEI ,  Noritoshi YAGIHASHI ,  Risa SAKURAI

IPC: B01J23/10 ,  C01B32/40 ,  B01J23/745 ,  B01J23/92 ,  B01J38/10

CPC classification number: B01J23/10 ,  C01B32/40 ,  B01J23/745 ,  B01J23/92 ,  B01J38/10

Abstract: A reducing agent for use in production of a product gas containing carbon monoxide, the reducing agent being brought into contact with a raw material gas containing carbon dioxide to reduce the carbon dioxide to produce the product gas; the reducing agent containing a composite metal oxide represented by Ce1-x(M)xOy, where M is a metal element with an ionic radius smaller than an ionic radius of Ce with an identical valence number and an identical coordination number, x represents a positive real number, and y represents a real number from 1 to 4. The reducing agent that has a high conversion efficiency of carbon dioxide to carbon monoxide, and can be used, for example, in a chemical looping method, and a method for producing a gas using such a reducing agent.

公开(公告)号：US20240270580A1

公开(公告)日：2024-08-15

申请号：US18282333

申请日：2022-03-16

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Keisuke IIJIMA ,  Koji TAKIZAWA ,  Risa SAKURAI

IPC: C01B32/40 ,  B01J23/34 ,  B01J23/83 ,  B01J23/86 ,  B01J23/889

CPC classification number: C01B32/40 ,  B01J23/34 ,  B01J23/83 ,  B01J23/86 ,  B01J23/889

Abstract: [Problem] There are provided: a reducing agent in which, in a perovskite oxide, when a combination of metal elements, a composition ratio thereof and the like are set, the amount of carbon dioxide is sufficiently reduced, the efficiency of converting carbon dioxide into valuables containing carbon (that is, a yield of valuables containing carbon) is high, and the efficiency of reduction using hydrogen is high; and a method of producing a gas using such a reducing agent.
[Solution] The reducing agent of the present invention produces valuables containing carbon by reduction of carbon dioxide and is easily reduced using hydrogen. The reducing agent contains an oxygen carrier having a perovskite type crystalline structure represented by a composition formula: ABOx (x is a real number of 2 to 4) and having oxygen ion conductivity, the A-site element includes at least one of metal elements belonging to Group 1 to Group 3 in the periodic table, the B-site element includes at least one metal element different from the A-site element, and when the electronegativity of the A-site element is Aχ, the electronegativity of the B-site element is Bχ, and the temperature at which carbon dioxide is brought into contact with the reducing agent is T(K), relationships of Aχ

公开(公告)号：US20240150181A1

公开(公告)日：2024-05-09

申请号：US18280071

申请日：2022-03-03

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Risa SAKURAI ,  Keisuke IIJIMA ,  Koji TAKIZAWA ,  Souichirou SUZUKI

IPC: C01B32/40 ,  B01J23/10 ,  B01J23/80 ,  B01J23/825 ,  B01J35/40 ,  B01J35/61 ,  B01J35/64 ,  C01G9/00 ,  C01G15/00 ,  C01G25/00

CPC classification number: C01B32/40 ,  B01J23/10 ,  B01J23/80 ,  B01J23/825 ,  B01J35/40 ,  B01J35/612 ,  B01J35/613 ,  B01J35/617 ,  B01J35/647 ,  B01J35/651 ,  C01G9/00 ,  C01G15/00 ,  C01G25/00

Abstract: There are provided, for example, a reducing agent that can be used in a chemical looping method, a method of producing a gas using such a reducing agent and a method of increasing conversion efficiency, through which the efficiency of converting carbon dioxide into carbon monoxide is high. The reducing agent of the present invention is a reducing agent that produces valuables containing carbon by reducing carbon dioxide, including a granular support having a plurality of pores and an angle of repose of 45° or more and an oxygen carrier which is supported on the support and has oxygen ion conductivity. In addition, in the reducing agent of the present invention, the support preferably has an average pore size of 0.1 nm or more.

公开(公告)号：US20230158475A1

公开(公告)日：2023-05-25

申请号：US17912574

申请日：2021-03-08

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Koji TAKIZAWA ,  Haruka NISHIYAMA

IPC: B01J21/08 ,  C01B33/20 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  C08F236/10 ,  C08L9/06 ,  C07C1/24

CPC classification number: B01J21/08 ,  C01B33/20 ,  B01J35/0013 ,  B01J35/026 ,  B01J35/023 ,  B01J35/1061 ,  B01J35/1066 ,  B01J35/1071 ,  C08F236/10 ,  C08L9/06 ,  C07C1/24 ,  C01P2004/24 ,  C01P2004/64 ,  C01P2004/62 ,  C01P2004/54 ,  C01P2006/16

Abstract: A catalyst includes at least one element X selected from the group consisting of Groups 3 to 6 of the Periodic Table, and at least one element Z selected from the group consisting of Group 14 elements. The catalyst is flaky and has pores in a thickness direction. A catalyst that is capable of suppressing an overreaction to a polymer and producing a diene compound, particularly butadiene, at a high yield can be provided.

公开(公告)号：US20230146921A1

公开(公告)日：2023-05-11

申请号：US17913605

申请日：2021-03-03

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Fiona MUKHERJEE ,  Kenichi SHINMEI ,  Noritoshi YAGIHASHI ,  Koji TAKIZAWA

IPC: B01J23/78 ,  B01J23/745 ,  B01J23/10 ,  B01J23/26 ,  B01J23/04 ,  B01J23/34 ,  C01B32/40

CPC classification number: B01J23/78 ,  B01J23/745 ,  B01J23/10 ,  B01J23/26 ,  B01J23/04 ,  B01J23/34 ,  C01B32/40

Abstract: A reducing agent for use in production of a product gas containing carbon monoxide, the reducing agent being brought into contact with a raw material gas containing carbon dioxide to reduce the carbon dioxide to produce the product gas; the reducing agent containing an oxygen carrier having oxygen ionic conductivity, and a basic oxide supported on the oxygen carrier. In addition, the basic oxide preferably contains at least one selected from the group consisting of lithium (Li), sodium (Na), potassium (K), magnesium (Mg), manganese (Mn), cobalt (Co), strontium (Sr), and rubidium (Rb). The reducing agent has a high conversion efficiency of carbon dioxide to carbon monoxide, and can be used, for example, in a chemical looping method, and a method for producing a gas using such a reducing agent.