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:
Feb. 20, 2024
Filed:
May. 15, 2018
Applicant:
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Inventors:
Eri Tateno, Tokyo, JP;
Sho Tamura, Tokyo, JP;
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 253/24 (2006.01); B01J 8/18 (2006.01); B01J 8/24 (2006.01); B01J 23/30 (2006.01); B01J 35/02 (2006.01);
U.S. Cl.
CPC ...
C07C 253/24 (2013.01); B01J 8/1827 (2013.01); B01J 8/1872 (2013.01); B01J 8/24 (2013.01); B01J 23/30 (2013.01); B01J 35/026 (2013.01); B01J 2208/00575 (2013.01);
Abstract
A process for producing unsaturated nitrile comprising a reaction step of subjecting hydrocarbon to a vapor phase catalytic ammoxidation reaction in a fluidized bed reactor to produce the corresponding unsaturated nitrile, wherein, in the reaction step, a powder is fed to a dense zone in the fluidized bed reactor using a carrier gas, and a ratio of a linear velocity LV1 of the carrier gas at a feed opening to feed the powder to the fluidized bed reactor to a linear velocity LV2 of a gas in the dense zone (LV1/LV2) is not less than 0.01 and not more than 1200.