Process for purifying molybdenite concentrates

Details Process for purifying molybdenite concentrates Process for purifying molybdenite concentrates

1982-09-30

1985-02-19

Rutledge, L. Dewayne

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423493, 75104, 75114, 75117, 75121, C01G 3900, C01G 2116

Patent

active

045004960

ABSTRACT:
An improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. According to this process, ferrous chloride liquor is introduced into a reactor which is made of a material that can withstand leaching with the use of ferric chloride at elevated temperatures and pressures. Sodium or calcium chloride may also be added to the reactor which is then sealed and subjected to chlorination until the rise in temperature, due to the exothermicity of the reaction, produces the desired concentration of the ferric ion to leach the impurities present in the concentrate to a desired level. Upon completion of the chlorination, the molybdenite concentrate is introduced into the reactor and is leached therein. Finally, the resulting pulp is filtered and washed to obtain the desired purified product.

REFERENCES:
patent: 3674424 (1972-07-01), Stanley et al.
patent: 3961941 (1976-06-01), Baker et al.
patent: 4066748 (1978-01-01), Lietard et al.
patent: 4082629 (1978-04-01), Milner et al.
patent: 4083921 (1978-04-01), Wesely

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