METHOD FOR PRODUCING BUTADIENE FROM ETHANOL WITH OPTIMISED IN SITU REGENERATION OF THE CATALYST OF THE SECOND REACTION STEP

摘要

The present invention relates to a method for producing butadiene from ethanol, in two reaction steps, comprising a step a) of converting the ethanol into acetaldehyde and a step b) of conversion into butadiene, the step b) simultaneously implementing a reaction step and a regeneration step in (n+n/2) fixed-bed reactors, n being equal to 4 or to a multiple thereof, comprising a catalyst, said regeneration step comprising four consecutive regeneration phases, the step b) also implementing three regeneration loops.