Title:
酸水溶液からヒ素を回収する方法
Document Type and Number:
Japanese Patent JP4223809
Kind Code:
B2
Abstract:
A process for the recovery of arsenic trioxide from acid solutions, particularly the aqueous acid effluent produced by a gas-washing process in the pyrometallurgy of copper sulfide ores is provided. Generally, the process comprises concentrating the acid solution in one or more evaporators in series; crystallizing arsenic contained in the concentrated solution as arsenic trioxide crystals; filtering the crystallized solution to obtain a solid phase comprising impure arsenic trioxide crystals; and purifying the solid phase to obtain a purified crystal product comprising arsenic trioxide. The process produces a commercially salable arsenic trioxide product without producing any solid or liquid residues subject to special handling or treatment regulations.
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Inventors:
Jose Mendoza Bidela
Jorge Balanda Andina
Hector Gallegos Cisterna
Jorge Balanda Andina
Hector Gallegos Cisterna
Application Number:
JP2002549588A
Publication Date:
February 12, 2009
Filing Date:
December 14, 2001
Export Citation:
Assignee:
BARRICK GOLD CORPORATION
International Classes:
C02F1/04; C02F1/62; B01D1/26; B01D7/02; B01D9/02; C01G28/00; C02F1/02; C22B3/44; C22B30/04; C02F1/52; C02F1/66; C01G
Domestic Patent References:
| JP48000193A | ||||
| JP60195021A | ||||
| JP46038567A | ||||
| JP57118028A | ||||
| JP58141346A | ||||
| JP59074245A | ||||
| JP3012282A | ||||
| JP2000135490A | ||||
| JP2002059175A |
Attorney, Agent or Firm:
Samejima Mutsumi
Genban Sanae
Genban Sanae