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Recovery of nitric acid from copper plating solution by diffusion dialysis
Authors: SUN Yahui,XIAO Liansheng
Units: Central South University, school of Metallurgy and Environmental, Changsha Hunan 410083
KeyWords: copper plating solution ;diffusion dialysis ; recovery of nitric acid
ClassificationCode:TQ028.8
year,volume(issue):pagination: 2015,35(3):70-75

Abstract:
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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AuthorIntro:
孙亚辉(1989-),男,河南周口人,中南大学在读硕士生,E-mail:908346174@qq.com;肖连生(联系人)中南大学教授,湖南衡阳人,主要从事湿法冶金分离方面研究工作,E-mail:xls1211@sina.com,

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