Process for recovering metals from catalysts for the hydrodesulfurization of hydrocarbons

摘要

P the present invention relates to the recovery of the molybdenum, vanadium, aluminium, as well as of the cobalt and nickel from statement of the catalysts of hydrodesulphurization. / p & & p & according to the invention, the residue of hydrodesulphurization catalysts for hydrocarbon has a chlorination by means of a mixture of gaseous chlorine, hydrochloric acid and water vapor, under conditions such that the molybdenum and vanadium are volatilized in the form of oxychlorides and the aluminum in the form of chloride and it absorbs the products thus volatilized by means of an aqueous medium containing hydrochloric acid. The water vapor content of the gaseous mixture of chlorination exceeds does not, then, approximately 15 by volume relative to the total gas mixture. / p