Claims
- 1. A process for removal and recovery of arsenic from arsenical flue dusts comprising: (1) forming an aqueous slurry of the flue dust, (2) treating said slurry with sulfur dioxide gas to reduce and solubilize arsenic, (3) filtering to separate insoluble residue, (4) treating the filtrate with sulfuric acid in an amount sufficient to provide a solution of about 40 to 50 percent acid, (5) cooling the solution to about 25.degree. C. or less to precipitate arsenic trioxide, (6) filtering to separate the arsenic trioxide, and (7) treating the filtrate from step (6) with granules of hydrated titanium dioxide to absorb additional arsenic.
Parent Case Info
This is a continuation of application Ser. No. 225,238 filed Jan. 15, 1981 and now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
Country |
Parent |
225238 |
Jan 1981 |
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