RECLAMATION OF A PALLADIUM-TIN BASED ELECTROLESS PLATING CATALYST FROM THE EXHAUSTED CATALYST SOLUTION AND ACCOMPANYING RINSE WATERS

摘要

A method for the recovery and reuse of an expensive palladium- tin catalyst whereby alkali hydroxide or carbonate is added to the exhausted catalytic solution and/or the spent rinse water solution to precipitate out a catalyst residue, which is then filtered, collected, washed, and dissolved in a hydrohalide acid and adjusted to a predetermined concentration.