Process for recovering metals from catalysts for the...

Details Process for recovering metals from catalysts for the... Process for recovering metals from catalysts for the...

C - Chemistry, Metallurgy

22

B

53/354, 252/1.C

C22B 7/00 (2006.01) C22B 1/08 (2006.01) C22B 21/00 (2006.01) C22B 34/22 (2006.01) C22B 34/34 (2006.01)

Patent

CA 1143952

ABSTRACT OF THE DISCLOSURE This invention relates to the recovery of molybdenum, vanadium, aluminium, as well as cobalt and nickel from resi- dues of hydrodesulfurization catalysts. According to the in- vention, the catalyst residues for the hydrodesulfurization of hydrocarbons are chlorinated by means of a mixture of gaseous chlorine, hydrochloric acid and water vapour under such condi- tions that molybdenum and vanadium volatilized as oxychlorides and the aluminum is volatilized as chloride. The so volatili- zed products are absorbed by means of an aqueous medium con- taining hydrochloric acid. The water vapour content of the chlorination gaseous mixture preferably does not exceed about 15% by volume in respect of the total gaseous mixture.

349047

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