发明名称 |
Process for recovering arsenic compounds by sodium hydroxide leaching |
摘要 |
An arsenic-recovery process primarily for use in conjunction with the hydrometallurgical processing of arsenic-containing materials for metal recovery. Arsenic is recovered from ferric arsenate by reaction with sodium hydroxide in accordance with the following general reaction: 3NaOH+FeAsO4->Na3AsO4+Fe(OH)3 During the processing of high arsenic materials such as smelter flue dust, extremely insoluble ferric-arsenic compounds are generated to immobilize the arsenic during leaching of the metals. The arsenic may be recovered in saleable form from the arsenic-containing residues by leaching with sodium hydroxide and crystallizing the arsenic salts from the leach residue.
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申请公布号 |
US4244927(A) |
申请公布日期 |
1981.01.13 |
申请号 |
US19790061412 |
申请日期 |
1979.07.27 |
申请人 |
HAZEN RESEARCH, INC. |
发明人 |
REYNOLDS, JAMES E.;COLTRINARI, ENZO L. |
分类号 |
C01G28/02;C22B30/04;(IPC1-7):C01B27/02 |
主分类号 |
C01G28/02 |
代理机构 |
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代理人 |
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