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Evaporative Crystallization of Aluminum Chloride Hexahydrate.
Nehl FH; Nicks LJ
NTIS: PB 92-209261 Available for Reference At Bureau Libraries :11 pages
As part of a U.S. Bureau of Mines research program to study processes for extraction of alumina from domestic resources, a bench- scale evaporate crystallizer was operated with solutions of impure aluminum chloride hexahydrate (ach). The purpose of the research was to determine the distribution of impurities in the bleedstream section of a proposed clay-hcl process. Impurities including mg, p, na, k, cr, and s were determined in ach crystals produced from feed solutions with a threefold range of impurities and at varied crystallizer slurry percent solids. Phosphorus was the limiting contaminant; 0.83 pct of the process alumina would have to be discarded for control. Crystallizer slurry in the range of 10 to 25 pct solids had little effect on crystal purity.
NTIS Accession No.
NTIS: PB 92-209261; Available for Reference At Bureau Libraries
Page last reviewed: September 24, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division