The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2025
Filed:
Mar. 01, 2022
Chiyoda Corporation, Yokohama, JP;
Ube Corporation, Ube, JP;
Mitsunori Shimura, Yokohama, JP;
Dai Takeda, Yokohama, JP;
Jun Matsumoto, Yokohama, JP;
Atsushi Yamada, Yamaguchi, JP;
Yuki Nagao, Yamaguchi, JP;
CHIYODA CORPORATION, Yokohama, JP;
UBE CORPORATION, Yamaguchi, JP;
Abstract
A manufacturing method of butadiene includes an electrolytic reduction process that produces ethylene and oxygen from carbon dioxide and water as a raw material by electrolytic reduction, a butene producing process that produces butene by dimerizing the ethylene produced in the electrolytic reduction process, a mixing process that prepares a mixed gas by mixing the oxygen produced in the electrolytic reduction process, the butene produced in the butene producing process, and air, and a butadiene producing process that produces butadiene by heating the mixed gas and oxidatively dehydrogenating the butene, wherein carbon dioxide by-produced in the butadiene producing process is used as a portion of the raw material in the electrolytic reduction process.