Process for recovery of aluminum chloride
AssigneeAluminum Company of America
InventorsRonald C. Schoener, Larry K. King, Lester L. Knapp, Nicholas Kloap
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Abstract
Method for directly desubliming gaseous aluminum chloride to solid form in a fluidized bed of solid particles of aluminum chloride at controlled temperatures for production of selectively constituted solid particulate aluminum chloride.
Claims11
Process for the recover of aluminum chloride from a gas containing gaseous aluminum chloride, comprising the steps of desubliming said gaseous aluminum chloride on particles of aluminum chloride in a self-replenishing fluidized bed thereof maintained by introduction of substantially aluminum chloride free gas at the lower perimetrically defining boundary thereof and at a temperature below the upper ambient desublimation temperature of aluminum chloride introducing gaseous aluminum chloride at a temperature above the upper ambient desublimation temperature thereof into the said fluidized bed at a location remote from the locus of introduction of said substantially aluminum chloride free gas, and removing selectively sized flowable particles of aluminum chloride from said fluidized bed.
Process for the recovery of solid aluminum chloride from a gaseous effluent containing such aluminum chloride in a gaseous state, comprising the steps of
- maintaining a fluidized bed of particles of aluminum chloride having defined upper and lower boundaries by introduction of substantially aluminum chloride free fluidizing gas adjacent the lower defining boundary thereof,
- maintaining said fluidized bed of particles of aluminum chloride at a predetermined temperature substantially below the upper ambient solidification temperature of aluminum chloride,
- introducing said aluminum chloride containing gaseous effluent at a temperature above the upper ambient solidification temperature of aluminum chloride into said fluidized bed of particles of aluminum chloride intermediate the upper and lower boundries thereof and remote from any contact surfaces perimetrically confining said fluidized bed or disposed therewithin to selectively desublime said gaseous aluminum chloride remote from said contact surfaces and effect a continued growth in the size of said particles of aluminum chloride constituting said bed,
- and selectively removing flowable and larger sized particles of aluminum chloride from adjacent the lower boundary of said fluidized bed.
Dependencies are inferred from the claim text.