| 扩散渗析回收含铜退镀液中的硝酸 |
| 作者: 中南大学 冶金与环境学院,湖南 长沙 410083 |
| 单位: 中南大学 冶金与环境学院,湖南 长沙 410083 |
| 关键词: 铜退镀液;扩散渗析;回收硝酸; |
| DOI号: |
| 分类号: TQ028.8 |
| 出版年,卷(期):页码: 2015, 35(3):70-75 |
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摘要: |
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采用扩散渗析法回收含铜退镀液中的HNO3,考察流量、流量比、温度等因素对硝酸的回收率、回收液中硝酸浓度以及铜和镍离子截留率的影响。将单级扩散渗析仪改装成了新的三级扩散渗析仪,考察了三级逆流扩散渗析对实验结果的影响。单级扩散渗析的结果表明最佳条件为:水/料的流比为1:1、流量为90mL/h 、温度为19℃,其硝酸回收率为86.95%、回收浓度为6.04mol/L、Cu2+和Ni2+的截留率分别为90.19%、92.71%。相对于单级扩散渗析,自行改装的三级扩散渗析过程能达到更高回收酸浓度和单位时间内处理更多的料液。在含铜退镀液体系下,利用国产扩散膜实现了扩散渗析对于H+和金属离子具有良好的分离,同时达到了回收硝酸浓度高于原退镀液的效果。 |
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Recovery of nitric acid from copper plating solution by diffusion dialysis was studied . Effects of flow rate, flow ratio and temperature on diffusion dialysis were analyzed. The recovery rate of nitric acid, concentration of nitric acid and retention rate of copper and nickel ions were invested. the machine of single-stage diffusion dialysis was remodeled as three-stage which results were analyzed. Under the operating condition of flow rate of 90ml/L at water or feed flow ratio as 1:1 and 19℃, the recovery rate of nitric acid was 86.95%,the concentration of nitric acid was 6.04mol/L, the retention rates of copper and nickel ions were 90.19% and92.71%. With respect to the single-stage diffusion dialysis, the three-stage can achieve higher acid concentration of recovery and more feed solution was processed. In copper plating system, acid and metallic ions were separated well by diffusion dialysis with the domestic diffusion membrane and can reaches higher acid concentration of recovery than the feed |
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基金项目: |
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作者简介: |
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Recovery of nitric acid from copper plating solution by diffusion dialysis was studied . Effects of flow rate, flow ratio and temperature on diffusion dialysis were analyzed. The recovery rate of nitric acid, concentration of nitric acid and retention rate of copper and nickel ions were invested. the machine of single-stage diffusion dialysis was remodeled as three-stage which results were analyzed. Under the operating condition of flow rate of 90ml/L at water or feed flow ratio as 1:1 and 19℃, the recovery rate of nitric acid was 86.95%,the concentration of nitric acid was 6.04mol/L, the retention rates of copper and nickel ions were 90.19% and92.71%. With respect to the single-stage diffusion dialysis, the three-stage can achieve higher acid concentration of recovery and more feed solution was processed. In copper plating system, acid and metallic ions were separated well by diffusion dialysis with the domestic diffusion membrane and can reaches higher acid concentration of recovery than the feed |
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参考文献: |
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[1]夏浩中,杨藤藤.分离回收无机酸与金属盐之商业化新工艺及装置[A].北京电镀行业清洁生产研讨会论文集[C].北京:北京电镀协会,2002.221~226。 |
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