发明名称 |
Process for recovering cyanide from copper-containing feed material |
摘要 |
A process for recovering cyanide from feed material containing cyanide and copper involves the steps of: (a) contacting the feed material with a strong base anion exchange resin whereby copper and cyanide from the feed material are adsorbed onto the resin; (b) contacting the resulting resin with an eluant solution containing free cyanide ion to elute copper and cyanide from the resin; (c) separating the eluted resin from the eluting solution or eluate from step (b); (d) acidifying the eluate from step (b) to precipitate copper; (e) separating the acidified solution from the precipitate in step (d) and alkalizing directly or after concentration the separated solution containing HCN; (f) contacting the eluted resin from step (b) with an acid to condition the resin and remove additional cyanide while leaving most of the copper in the resin phase; (g) converting the HCN solution formed in step (f) to cyanide ion, directly or after concentration of the HCN solution, by the addition of alkali; and (h) returning the conditioned resin from step (f) to step (a) above.
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申请公布号 |
US6919030(B2) |
申请公布日期 |
2005.07.19 |
申请号 |
US20030373006 |
申请日期 |
2003.02.24 |
申请人 |
HANNAH TECHNOLOGIES LIMITED PARTNERSHIP |
发明人 |
THORPE JOHN A.;FLEMING CHRISTOPHER A. |
分类号 |
B01J41/04;(IPC1-7):C02F1/42;B01J49/00 |
主分类号 |
B01J41/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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