Patent ID: 6894183
Filing Date: 2005-05-17
Classification: B01J,C10G

Abstract:
1. A method for ammoxidation of propylene or propane to acrylonitrile, comprising a step requiring gas-solid contact in a bubbling fluidized bed reactor said method comprising: (a) introducing into a reactor with bed length to bed diameter ratio below about 5.0, a primary gas consisting essentially of reactant(s) of the reaction to be carried out in the bed of solid particles through a primary gas distributor located at the reactor bottom at a superficial gas velocity U (b) forming gas bubbles in the incipiently fluidized bed by introducing through a secondary gas distributor located immediately above the primary gas distributor a secondary gas, selected from one of the reactants which is used in excess of that required for the reaction stoichiometry, steam, an inert or a mixture of two or more thereof at a superficial gas velocity, U