| abstract |
The present invention relates to a method for recovering platinum from a platinum-based catalyst, and more particularly, to prepare a platinum chloride solution by adding aqua regia to a platinum-based spent catalyst, and then adding acetone together with triphenylphosphine to form tetrakis. It relates to a method for recovering platinum by precipitating (triphenylphosphine) platinum (Tetrakis (triphenylphosphine) platinum). Platinum recovery method of the present invention has no chlorine gas discharge as compared to the conventional method for recovering platinum by firing ammonium chloroplatinic acid, it is possible to recover the platinum at a calcination temperature of 380 ~ 500 ℃ mild conditions. In addition, the recovered platinum can be applied again to the production of platinum-based catalysts, etc., and thus it is possible to cope with the increasing demand for platinum. |