Method of producing high purity aluminum chloride
AssigneeAluminum Company of America
InventorsStanley C. Jacobs, Larry K. King
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Abstract
Recovery of high purity aluminum chloride is achieved by use of a series of condensers wherein the first condenser is operated at a high temperature of 80.degree.-110.degree. C to insure minimum condensation of other metal chlorides such as titanium chloride, silicon chloride, or the like, while a second condenser operates at a much lower temperature of from 20.degree.-50.degree. C to trap all impurities while reducing the chloride losses to a minimum. The product of the first condenser may then be used as a feed for the electrolytic reduction of aluminum chloride to metallic aluminum.
Claims3
In the process for the recovery of high purity particulate aluminum chloride from a chlorinator by the condensation of hot aluminum chloride vapors the improvement which comprises:
- a. introducing the aluminum chloride vapors at an entrance velocity of 18 to 90 meters/sec into a first fluidized bed having a particle size range of 1-500 microns of aluminum chloride particles maintained at a temperature of 80.degree.-110.degree. C;
- b. removing solid particles of aluminum chloride from the fluidized bed at a point adjacent the bottom of the fluidized bed;
- and
- c. passing the remaining uncondensed gases and vapors from said first fluidized bed at an entrance velocity of 18-90 meter sec into a second fluidized bed of aluminum chloride particles having a particle size range of 1-500 microns and maintained at a temperature of 20.degree.-50.degree. C to recover the remainder of the chloride values from said gases and vapors.
Dependencies are inferred from the claim text.