| Three wet processes, including the aqueous chlorination and aqua regia dissolution and oxidative dissolution with sodium chlorate, were used and compared in recovering rhodium from the rhodium-containing resin, and the influence of the reaction temperature, reaction time and liquid-solid ratio on the dissolution rate of rhodium was investigated. The results showed that a dissolution rate of 95% could be accomplished by adopting the aqueous chlorination process at a reaction temperature of 90°C for 20 h with a liquid(in mL)-solid(in gram) ratio of 12:1. After refining, rhodium powder in line with quality standards was obtained with a recovery rate of 92%. |
