Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1981-11-17
1983-05-03
Konopka, P. E.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
252412, 423 68, C01G 3900, C01G 3100
Patent
active
043820689
ABSTRACT:
The invention provides a novel method for selectively recovering molybdenum nd vanadium values from a spent catalyst used for the hydrogenation desulfurization of petroleums by the extraction with an alkaline extractant solution without the necessity of preliminary calcination of the spent catalyst containing, in addition to the molybdenum and vanadium values, nickel, cobalt and other heavy metals as well as sulfur and carbonaceous matters as the contaminants supported by or deposited on an alumina carrier. The inventive method utilizes an aqueous alkaline solution of sodium carbonate with admixture of hydrogen peroxide as an oxidizing agent whereby an unexpectedly high percent extraction is obtained for the molybdenum and vanadium values reaching 99% or higher for the former and about 85% for the latter while the extraction of nickel, cobalt and aluminum can be minimized.
REFERENCES:
patent: Re22097 (1942-05-01), Wells
patent: 3562150 (1971-02-01), Hamilton et al.
patent: 3959436 (1976-05-01), Watts
patent: 4087510 (1978-05-01), Steenken
Director-General of the Agency of Industrial Science and Technol
Konopka P. E.
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