論説報文
Electrowinning of Platinum Using a Modified Cyclone Reactor
2004 年 51 巻 1 号 p. 48-51
詳細
2004 年 51 巻 1 号 p. 48-51
The electrochemical behavior of platinum in dilute acidic media solutions were investigated using a rotating disc electrode system and a modified electrochemical cyclone cell at 25°C. Electrochemical polarization data showed that the limiting current density for platinum deposition was observed around −0.25 V (vs. SCE), and the diffusion coefficient of platinum estimated using Levich equation was 3.25 × 10-6cm2 s-1. The effects of several variables such as applied voltage, hydrochloric acid concentration and electrolyte flow rate were examined using a cyclone cell in order to obtain the optimum condition for electrowinning of platinum. More than 90% of the platinum in solution was recovered within an hour under the optimum conditions.
