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:
Oct. 25, 2022
Filed:
Jul. 06, 2020
Sekisui Chemical Co., Ltd., Osaka, JP;
SEKISUI CHEMICAL CO., LTD., Osaka, JP;
Abstract
The method of the present invention for producing 1,3-butadiene includes: vaporizing an ethanol feedstock in a vaporizer (), supplying the feedstock to two or more parallel first reactors () to convert ethanol into acetaldehyde in the presence of a first catalyst; supplying a resulting intermediate gas to a second reactor () to convert ethanol and acetaldehyde into 1,3-butadiene in the presence of a second catalyst; purifying a resulting crude gas containing 1,3-butadiene by a gas-liquid separator (), a first distillation column (), a fourth reactor (), and a second distillation column (); and supplying an oxygen-containing gas to at least one of the two or more parallel first reactors () under specific conditions, while discharging a carbon dioxide-containing gas from the first reactor (), to thereby regenerate the first catalyst, while continuing the conversion reaction.