Reduction of MoO.sub.3 and ammonium molybdates by ammonia in a r

Details Reduction of MoO.sub.3 and ammonium molybdates by ammonia in a r Reduction of MoO.sub.3 and ammonium molybdates by ammonia in a r

1984-04-24

1985-10-15

Lieberman, Allan M.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

266173, 266163, C22B 3434

Patent

active

045472203

ABSTRACT:
A method is disclosed for the intermediate reduction of a molybdenum compound selected from the group consisting of MoO.sub.3 and ammonium molybdate to MoO.sub.2. The molybdenum compound is fed to an indirectly fired inclined rotary calciner and uncracked ammonia caused to flow to the rotary calciner either concurrently or countercurrently to the flow of the molybdenum compound. The residence time and temperature are controlled to produce MoO.sub.2 at a conversion efficiency of at least about 80%.

REFERENCES:
patent: 3146093 (1964-08-01), Foos et al.
patent: 3833352 (1974-09-01), Voljkovic
patent: 3865573 (1975-02-01), Neumann et al.
patent: 4045216 (1977-08-01), Meyer et al.

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