Recovery of arsenic from flue dust

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group va metal or arsenic

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423 99, 423617, 75 25, 75101R, 75121, C01G 2800

Patent

active

044016328

ABSTRACT:
Arsenic is recovered from flue dusts by forming an aqueous slurry of the dust, treating the slurry with SO.sub.2 gas to solubilize arsenic, and precipitating the arsenic as As.sub.2 O.sub.3 by means of sulfuric acid.

REFERENCES:
patent: 1148522 (1915-08-01), Martin et al.
patent: 1180765 (1916-04-01), Durant
patent: 1921706 (1933-08-01), Schopper
patent: 1952290 (1934-03-01), Schopper
patent: 3149964 (1964-09-01), Schwartz

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