Process for recovering molybdenum values from spent catalysts

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal

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423 53, 423606, 423593, 423 61, 75121, C01G 3900

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active

040752771

ABSTRACT:
A process of recovering molybdenum in the form of molybdic acid from waste products and particularly from spent catalysts containing a support based on gamma-alumina wherein the molybdenum is in the form of molybdenum oxide or molybdenum sulfide comprising treating the waste products with sodium carbonate and heating to convert the molybdenum present to sodium molybdate, and converting the sodium molybdate to molybdic acid by treatment with concentrated nitric acid to produce molybdic acid high in purity that is suitable for the production of molybdenum compounds as well as for the recovery of the pure metal.

REFERENCES:
patent: 1293404 (1919-02-01), Giles et al.
patent: 1948407 (1934-02-01), Watts
patent: 2367506 (1945-01-01), Kissock
patent: 3622301 (1971-11-01), Mehl et al.
patent: 3773890 (1973-11-01), Fox et al.

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