发明名称 |
METHOD FOR PREPARING COPPER POWDER FROM WASTE ETCHANT |
摘要 |
PURPOSE: A method for recovering high purity copper powder of fine particles from waste etchant containing copper using electrolyzer is provided. CONSTITUTION: The method comprises a step (S10) of agitating waste etchant (α-etchant); a step (S20) of adjusting concentration of copper contained in the waste etchant to 13.5 g/L; a step (S30) of injecting the waste etchant into electrolysis reaction container; a step (S40) of proceeding electrolysis collecting reaction as maintaining temperature inside the reaction container to 28 deg.C, pH to 8.6, current density to 6 A/cm¬2 and agitation speed of agitator to 150 rpm; a step (S50) of precipitating copper powder under the cathode by proceeding reaction so that electrolysis rate inside the reaction container is maintained to 1 g/h or more; a step (S60) of taking out and filtering the precipitates; and a step (S70) of drying the washed precipitates after washing the precipitates with water.
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申请公布号 |
KR20030064177(A) |
申请公布日期 |
2003.07.31 |
申请号 |
KR20020004683 |
申请日期 |
2002.01.26 |
申请人 |
CHUNGNAM NATIONAL UNIVERSITY |
发明人 |
WON, CHANG HWAN |
分类号 |
C25C5/02;(IPC1-7):C25C5/02 |
主分类号 |
C25C5/02 |
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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