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:
May. 05, 2020
Filed:
Jun. 08, 2018
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Sho Tamura, Tokyo, JP;
Dai Nagata, Tokyo, JP;
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A process for producing unsaturated nitrile, using a fluidized bed reactor having an internal space having a catalyst capable of being fluidized therein, a feed opening to feed a starting material gas comprising hydrocarbon to the internal space, and a discharge port to discharge a reaction product gas from the internal space, the process comprising a reaction step of subjecting the hydrocarbon to a vapor phase catalytic ammoxidation reaction in the presence of the catalyst in the internal space to produce the corresponding unsaturated nitrile, wherein when in the internal space, a space where an existing amount of the catalyst per unit volume is 150 kg/mor more is defined as a dense zone and a space where an existing amount of the catalyst per unit volume is less than 150 kg/mis defined as a sparse zone in the reaction step, a gas residence time in the sparse zone is 5 to 50 sec.