Process for manufacture of aluminum

Details Process for manufacture of aluminum Process for manufacture of aluminum

1980-06-02

1982-04-13

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C22B 2102

Patent

active

043245854

ABSTRACT:
The invention is a multistep process for the production of metallic aluminum. An aluminum containing ore such as bauxite, alumina, and clay is reacted with a carbon containing material, oxygen and bromine at an elevated temperature to produce aluminum bromide. The aluminum bromide is then electrolyzed to give aluminum and bromine. The bromine is conveniently recycled to the first step. The oxides and other reactive contaminants in the ore starting materials are simultaneously converted to bromides which can be hydrolyzed and oxidized to bromine for use in the process. Alternative steps in the process are also possible which avoid the electrolysis step but use a disproportionation step.

REFERENCES:
patent: 3832164 (1974-08-01), Kapolyi et al.
patent: 3938988 (1976-02-01), Othmer

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