Sulfide oxidation process for production of molybdenum oxides from molybdenite
AssigneeOrchard Material Technology, LLC
InventorsLarry F. McHugh, Leonid N. Shekhter, Joseph D. Lessard, Daniel G. Gribbin, Esra Cankaya-Yalcin
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Abstract
A looping method for production of MoO2, the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoO3 and oxygen in a first furnace to produce MoO2 and SO2, removing a first portion of the MoO2 from the first furnace, transferring a second portion of the MoO2 from the first furnace to a second furnace, reoxidizing of the transferred portion of the MoO2 in the second furnace to MoO3; and looping the MoO3 from the second furnace to the first furnace for use as an oxidizing agent.
Claims23
A pyrometallurgical method for production of molybdenum(IV) oxide, the method comprising:
- (a) contacting a molybdenite feed with oxygen in a furnace comprising a high temperature zone, wherein an amount of the oxygen is substantially stoichiometric;
- and
- (b) reacting the molybdenite feed with the oxygen to produce molybdenum(IV) oxide and sulfur(IV) oxide,
- wherein complete desulfurization of the molybdenite feed is accomplished in the high temperature zone at a temperature of about 1,000 to about 1,500° C. with a residence time of about 0.1 to about 40 seconds.
A looping method for production of molybdenum(IV) oxide, the method comprising:
- (a) reacting a molybdenite feed with a substantially stoichiometric mixture comprising molybdenum(VI) oxide and oxygen in a first furnace to produce molybdenum(IV) oxide and sulfur(IV) oxide;
- (b) removing a first portion of the molybdenum(IV) oxide from the first furnace;
- (c) transferring a second portion of the molybdenum(IV) oxide from the first furnace to a second furnace;
- (d) reoxidizing the second portion of the molybdenum(IV) oxide in the second furnace to molybdenum(VI) oxide;
- and
- (e) looping the molybdenum(VI) oxide from the second furnace to the first furnace for use as an oxidizing agent.
Dependencies are inferred from the claim text.