| abstract |
An object of the present invention is to provide a method for regenerating a catalyst for producing butadiene by removing n-butene from a coke oven attached to a catalyst and an oxidative dehydrogenation reaction in the presence of a catalyst for the production of butadiene. The present invention relates to a regeneration method of a catalyst for use in an oxidative dehydrogenation reaction of butene to remove a coke oven substance in a reactor filled with a butadiene production catalyst having a predetermined composition as a composition before use, % Oxygen, and a second gas containing greater than 0 volume%, less than 42 volume% water vapor, greater than 0 volume% and less than or equal to 21 volume% oxygen, The temperature of the heat of the heat exchanger is controlled to be in a range of 200 ° C or more and less than 400 ° C, The temperature is kept constant and the contents of water vapor in the first and second gases are different. |