Method of obtaining the cupric oxalate from discharging acidic copper containing waste liquid in the production of printed circuit board (PCB)
A method of obtaining the cupric oxalate from discharging acidic copper-containing waste liquid in the production of printed circuit board (PCB). The proper solid powder of oxalic acid (H2C2O4) is added into the acidic copper-containing waste liquid, in which the oxalic acid can be blended with the...
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Patent |
| Sprache: | chi ; eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | A method of obtaining the cupric oxalate from discharging acidic copper-containing waste liquid in the production of printed circuit board (PCB). The proper solid powder of oxalic acid (H2C2O4) is added into the acidic copper-containing waste liquid, in which the oxalic acid can be blended with the acidic copper-containing waste liquid and then the oxalate (C2O4) is obtained by utilizing the hydrolysis reaction. The copper ions (Cu) in the acidic copper containing waste liquid are caught by the oxalate to be integrated into the cupric oxalate powder (CuC2O4), which is further separated from the acidic copper-containing waste liquid by the use of filtration or precipitation, and then the solid cupric oxalate is obtained. |
|---|