Chemistry: electrical and wave energy – Processes and products
Patent
1979-06-14
1981-05-05
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
75 68A, 75 68R, C22B 2102, C25C 306
Patent
active
042657164
ABSTRACT:
Aluminous ore such as bauxite containing alumina is blended with coke or other suitable form of carbon and reacted with sulfur gas at an elevated temperature. For handling, the ore and coke can be extruded into conveniently sized pellets. The reaction with sulfur gas produces molten aluminum sulfide which is separated from residual solid reactants and impurities. The aluminum sulfide is further increased in temperature to cause its decomposition or sublimation, yielding aluminum subsulfide liquid (AlS) and sulfur gas that is recycled. The aluminum monosulfide is then cooled to below its disproportionation temperature to again form molten aluminum sulfide and aluminum metal. A liquid-liquid or liquid-solid separation, depending on the separation temperature, provides product aluminum and aluminum sulfide for recycle to the disproportionation step.
REFERENCES:
patent: 1941610 (1934-01-01), Macready
patent: 2400000 (1946-05-01), Gardner
patent: 2843475 (1958-07-01), Weiss
Keller Rudolf
Loutfy Raouf O.
Yao Neng-Ping
Denny James E.
Glenn Hugh W.
Jackson Frank H.
The United States of America as represented by the United States
Williams Howard S.
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