Patent ID: 7857888
Filing Date: 2010-12-28
Classification: B01D,B01J,C22B,Y02P

Abstract:
1. A method for separation and recovery of noble metals as a method for separating and recovering individual noble metal components from metal materials containing noble metals, the method comprising: (1) preparing a metal hydrochloric acid solution by treating the metals materials with hydrochloric acid; (2) passing the metal hydrochloric acid solution obtained in the step (1) through a first cellulose column to adsorb all the noble metal components onto cellulose; (3) flowing a mixed solution of hydrochloric acid and 2-propanone to the first cellulose column which has adsorbed the noble metal components in the step (2) to develop and sequentially elute the noble metal components, thereby separating the noble metal components into a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, and separating and recovering the fraction including heavy platinum-group metals and gold; (4) further developing and eluting with the mixed solution of hydrochloric acid and 2-propanone to sequentially separate and collect a palladium containing fraction, a ruthenium containing fraction and rhodium containing fraction from the fraction containing light platinum-group metals; (5) passing the fraction containing heavy platinum-group metals and gold obtained in the step (3) through a second cellulose column to adsorb noble metal components contained therein onto the second cellulose column; (6) flowing a mixed solution of hydrochloric acid and 1-butanol to the second cellulose column which has adsorbed the noble metal components obtained in the step (5) to develop and sequentially elute the noble metal components, thereby separating and collecting a gold containing fraction, an osmium containing fraction, an iridium containing fraction and a platinum containing fraction; and (7) recovering the noble metals as isolated metals from the respective fractions collected in the steps (4) and (6).