公开(公告)号：US20230365414A1

公开(公告)日：2023-11-16

申请号：US18019561

申请日：2020-08-04

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Yuki NAKAMA ,  Rasika DASANAYAKE ALUTHGE

IPC: C01B32/40 ,  B01J8/04

CPC classification number: C01B32/40 ,  B01J8/04 ,  B01J8/0496 ,  B01J2208/00132 ,  B01J2208/065

Abstract: A gas production apparatus and a gas production system capable of continuously and stably manufacturing a produced gas containing carbon monoxide from a raw material gas containing carbon dioxide are provided. A gas production apparatus 1 is an apparatus that manufactures a produced gas containing carbon monoxide by bringing a raw material gas containing carbon dioxide into contact with a reducing agent containing a metal oxide that reduces carbon dioxide. The gas production apparatus includes a reaction section 4 that includes a plurality of reactors 4a and 4b and a reducing agent arranged in the reactors 4a and 4b, and that is capable of switching between the raw material gas and the reducing gas to be supplied to each of the reactors 4a and 4b. When a predetermined amount of raw material gas is supplied to the reactors 4a and 4b, or when the conversion efficiency of carbon dioxide to carbon monoxide falls below a predetermined value, the gas production apparatus is configured to switch between the raw material gas and the reducing gas to be supplied to each reactor 4a and 4b.

公开(公告)号：US20220204424A1

公开(公告)日：2022-06-30

申请号：US17623756

申请日：2020-07-06

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Noritoshi YAGIHASHI ,  Haruka NISHIYAMA ,  Yuki NAKAMA

IPC: C07C1/24 ,  C07C7/04 ,  B01D3/14

Abstract: In the method of the present invention, 1,3-butadiene is produced by vaporizing an ethanol feedstock in a vaporizer (104), feeding the resulting into two or more parallel first reactors (108) to convert the ethanol to acetaldehyde in the presence of a first catalyst, supplying the resulting intermediate gas to a second reactor (110) to convert the ethanol and acetaldehyde to 1,3-butadiene in the presence of a second catalyst, purifying the resulting crude gas containing 1,3-butadiene by a gas-liquid separator (112), a first distillation column (114), a fourth reactor (116), a second distillation column (118), and mixing one of both of a part of the ethanol-containing gas and an acetaldehyde-containing gas obtained in the second distillation column (118) are mixed with the intermediate gas, thereby adjusting an ethanol/acetaldehyde molar ratio in the intermediate gas to 1 to 100.