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Recovery of Arsenic from Flue Dust.
Madsen-BW; Dolezal-H; Bloom-PA; Shirts-MB
U S Patent Number 4 401 632 1983 Aug; :
Flue dusts, especially those from smelter operations and containing 10-30 pct as, are treated in an aqueous slurry at 0 deg-90 deg c with so2 to solubilize the as and form as2o3. Subsequently the as2o3 is precipitated by adding h2so4.
U.S. Patent Number 4,401,632, August 30, 1983; Chem. Abstr. 96:164,984G