METHOD OF REGENERATING LOWER HYDROCARBON AROMATIZING CATALYST

摘要

Regeneration of a lower hydrocarbon aromatizing catalyst for enhancing of the stability of catalytic performance is carried out.The method of regenerating an aromatizing catalyst comprises the steps of reacting a lower hydrocarbon aromatizing catalyst having been used in an aromatizing reaction of lower hydrocarbon with hydrogen gas; feeding an inert gas or reducing gas into an atmosphere containing the hydrogen gas having been employed in the reaction with the aromatizing catalyst to thereby lower the temperature of the atmosphere; reacting the aromatizing catalyst having been brought into the reaction with the inert gas with an oxidizing gas; and reacting the aromatizing catalyst having been brought into the reaction with the oxidizing gas with a reducing gas. The step of reacting the aromatizing catalyst with hydrogen gas is carried out within the same temperature region as in the aromatizing reaction. In the temperature lowering step, the inert gas is fed so that the temperature of the aromatizing catalyst is in the range of 400° to 550°C. In the step of reacting the aromatizing catalyst with the oxidizing gas, the temperature of the atmosphere for the reaction of the aromatizing catalyst with the oxidizing gas is set to 450° to 500°C.