Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1984-02-27
1985-11-05
Carter, H. T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
423 53, C01G 3902
Patent
active
045513139
ABSTRACT:
A process and system are provided for flash-sublimation of molybdic oxide containing slag-forming constituents. The process comprises feeding a pneumatically suspended stream of particulate molybdic oxide and a mixture of fuel and oxidizing gases through a nozzle into a confined furnace chamber, the fuel gas-oxidizing gas mixture exiting from the nozzle being ignited to provide a flame thereof, the flame being maintained at a condition to provide a temperature in the furnace chamber in excess of that required to sublime molybdic oxide. The temperature is preferably at least sufficient to melt slag-forming constituents contained in said molybdic oxide such that the slag formed is sufficiently liquid to separate from the gaseous mixture and collect at a selected portion of the chamber for removal therefrom. The resulting gases and suspended solids including sublimed molybdenum trioxide are caused to flow from said furnace chamber to and through a condensing chamber, the temperature of the condensing chamber being controlled to above the condensing temperature of the sublimed molybdenum trioxide but below the volatilization temperature of the impurities present and thereby effect a separation of the molybdenum trioxide from the impurities. The separated molybdenum trioxide vapors are then passed to a condenser to condense and recover the molybdenum trioxide as solids and separate it from off-gases.
REFERENCES:
patent: 1426602 (1922-08-01), Robertson
patent: 3139326 (1964-06-01), Costello
patent: 3848050 (1974-11-01), Jamal
Hepworth Malcolm T.
Sabacky Bruce J.
Amax Inc.
Carter H. T.
Ciomek Michael A.
Kalil Eugene J.
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