发明授权
- 专利标题： PROCESS FOR REMOVING SELENIUM AND MERCURY FROM AQUEOUS SOLUTIONS
- 专利标题（中）： 程序从水溶液中除去硒，汞
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申请号： EP00938378.7申请日： 2000-06-09
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公开(公告)号： EP1226092B1公开(公告)日： 2007-12-26
- 发明人: HOULACHI, George , MONTEITH, Gary , ROSATO, Lucy
- 申请人： Noranda Inc.
- 申请人地址： BCE Place, 181 Bay Street, Suite 4100, P.O. Box 755 Toronto, Ontario, M5J 2T3 CA
- 专利权人： Noranda Inc.
- 当前专利权人： Noranda Inc.
- 当前专利权人地址： BCE Place, 181 Bay Street, Suite 4100, P.O. Box 755 Toronto, Ontario, M5J 2T3 CA
- 代理机构： Prins, Adrianus Willem
- 优先权： US329353 19990610
- 国际公布： WO2000076917 20001221
- 主分类号： C01B17/90
- IPC分类号： C01B17/90 ; C01B17/56 ; C01B17/52 ; C01B19/00 ; C02F1/52 ; B01D53/73
摘要：
The present invention relates to an apparatus for removing volatile impurities such as mercury and selenium from a weak acid solution resulting from scrubbing gases created in the production of sulfuric acid by roasting of sulfide concentrates. The apparatus comprises a calcine filtering unit for removing calcine from the weak acid solution, a sodium sulfide mixing unit for precipitating mercury from the weak acid solution, a sodium dithionite mixing unit for precipitating selenium from the weak acid solution, and a mercury-selenium filtering unit for filtering the precipitated mercury and selenium from the weak acid solution. The present invention further relates to a treatment plant utilizing such an apparatus, a process for removing volatile impurities from a weak acid solution, and a selenium cake obtained by utilizing the present invention.
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