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US 4,039,648 AGranted
Production of aluminum chloride
AssigneeAluminum Company of America
InventorsWarren E. Haupin, John A. Remper, M. Benjamin Dell
Life of this patent
Estimating the term…
Abstract
A method for producing aluminum chloride comprises contacting Al.sub.2 O.sub.3 with a reducing agent and chlorine in a bath of molten metal halides to form aluminum chloride and recovering the aluminum chloride by vaporization.
Claims10
A method of producing AlCl.sub.3 comprising:
- a. contacting alumina which has been extracted from its ore and which has a surface area in the range of 0.5 to 110 m.sup.2 /g and a carbonaceous reducing agent with a source of Cl.sub.2 in a molten bath containing at least 30% by weight AlCl.sub.3 with the balance consisting essentially of at least one metal halide, said bath being at a temperature in the range of 150.degree. to 1000.degree. C., said method being capable of exothermically converting substantially 100% of said Cl.sub.2 to AlCl.sub.3 ;
- b. maintaining said carbonaceous reducing agent in said bath in an amount in the range of 0.05 to 0.5 lbs/lb of molten bath, further maintaining said alumina in said bath in an amount in the range of 0.05 to 0.5 lbs/lb of molten bath;
- c. adding the alumina, reducing agent and Cl.sub.2 to said bath in stoichiometric amounts for purposes of said contacting thereby maintaining the reducing agent and the alumina in said ranges;
- and
- d. recovering AlCl.sub.3 by vaporization from the bath.
2 more elements
A method of producing AlCl.sub.3 comprising:
- a. contacting alumina, which has been extracted from its ore and calcined at a temperature of at least 600.degree. C., and solid carbon, both ground to a mesh size of less than 64 (Tyler series), with gaseous chlorine in a molten bath, the alumina having a surface area in the range of 0.5 to 110 m.sup.2 /g, the molten bath containing 30% - 70% by weight AlCl.sub.3 with the balance consisting essentially of NaCl at a temperature of 400.degree. to 950.degree. C., said bath capable of exothermically converting substantially 100% of said Cl.sub.2 to AlCl.sub.3 ;
- b. maintaining said carbon in said bath in an amount in the range of 0.05 to 0.5 lbs/lb of molten bath, and further maintaining said alumina in said bath in an amount in the range of 0.05 to 0.5 lbs/lb of molten bath;
- c. adding the alumina, carbon and Cl.sub.2 to the bath in stoichiometric amounts for purposes of said contacting thereby maintaining the alumina and carbon in said ranges;
- and
- d. recovering AlCl.sub.3 by vaporization from the bath.
2 more elements
Dependencies are inferred from the claim text.