Oxidation and oxydehydrogenation of hydrocarbons in the fluidized bed
AssigneeBASF SE
InventorsAlfred Hagemeyer, Jurgen Schweinzer, Otto Watzenberger
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Abstract
A process for the oxidation and oxidative dehydrogenation of hydrocarbons, in particular ethylbenzene, to form corresponding oxidized or olefinically unsaturated compounds, in particular styrene, over an oxygen-conferring, oxygen-regenerable catalyst involving a working period, a time-displaced regenerating period and at least one intermediate rinsing period comprises effecting a partial regeneration during the working period by time-displaced addition of a substoichiometric amount of oxygen.
Claims11
A process for oxidative dehydrogenation of hydrocarbons to form corresponding olefinically unsaturated compounds over a redox catalyst which comprises the steps of:
- (1) filling a fluidized-bed reactor with the catalyst;
- (2) feeding a fluidizing gas and hydrocarbons in the absence of free oxygen into the fluidized-bed reactor wherein the hydrocarbons come into contact with the catalyst;
- (3) adding an oxidant containing substoichiometric mol % of oxygen with respect to hydrocarbons during the oxidative dehydrogenation period after steady state conditions have been attained;
- (4) feeding the hydrocarbon in the absence of free oxygen to the fluidized-bed reactor where it comes into contact with the redox catalyst during the oxidative dehydrogenation period;
- which results in the hydrocarbon being oxidatively dehydrogenated while the redox catalyst is regenerated.
Dependencies are inferred from the claim text.