S.No
Leaching mixture
% Copper
% Tin
1
2.18 N H
2
SO
4
+ 3 N HCl
8.5
58.2
2
3 N HCl +1 N HNO
3
92.7
93.3
3
3N HCl
23.8
85.1
4
2 N HCl + 2 N HNO
3
75.85
76.7
5
3 N HCl + 2N HNO
3
46.71
89.48
6
3 N HNO
3
86.95
93.3
7
2.5 N HCl + 2.5 N HNO
3
52.42
92.21
Table 2:
Percentage of Cu & Sn obtained from leached acidic solution after 120 min.
