Patent ID: 11905233
Assignee: ASAHI KASEL KABUSHIKI KAISHA
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. A process for producing an unsaturated nitrile comprising a reaction step of subjecting hydrocarbon to a vapor phase catalytic ammoxidation reaction in a fluidized bed reactor to produce a 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,
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,
the powder comprises one or more powders selected from the group consisting of a catalytic powder used for the vapor phase catalytic ammoxidation reaction, a powder containing a Mo compound to replenish the catalyst with Mo atoms, and a powder containing a W compound to add W atoms to the catalyst, and
the inner diameter of the fluidized bed reactor at the section corresponding to the dense zone is not less than 0.5 mφ and not more than 20 mφ.