Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-04-19
1980-09-23
Rosenberg, P. D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 53, 75134S, 423 47, C21C 702
Patent
active
042240581
ABSTRACT:
A method for desulphurizing fluid materials such as molten iron, steel, stack gases, synthetic natural gases, boiler gases, coal gasification and liquification products and the like is provided in which one of the group rare earth oxides, rare earth fluocarbonates, rare earth oxyfluorides and mixtures thereof, including bastnasite concentrates are reacted at low oxygen potential, with the sulphur to be removed to form one of the group consisting of rare earth sulphides, rare earth oxysulphides and mixtures thereof. The low oxygen potential can be achieved by carrying out the reaction in the presence of vacuum, reducing gases, carbon, etc.
REFERENCES:
patent: 3211549 (1965-10-01), Kusaka
patent: 3784374 (1974-01-01), Almand
patent: 3795505 (1974-03-01), Corradini
patent: 3816103 (1974-06-01), Link
patent: 4018597 (1977-04-01), Staggers
Kay D. Alan R.
Wilson William G.
MolyCorp, Inc.
Rosenberg P. D.
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