| 摘要 |
Processes and systems (10, 30) for recovering promoter-containing compounds, for example, perrhenates, from promoter-containing catalyst substrates, for example, substrates containing precious metals, such as silver, are disclosed. The processes (10, 30) include contacting the substrates (14) with a first solution (16) adapted to remove at least some of the catalyst promoter from the substrates, for example, an oxidizing agent, to produce a second solution (18, 52) containing catalyst promoter, passing the second solution through a porous medium (22, 34) adapted to capture at least some of the catalyst promoter, for example, a ion exchange resin; and passing a third solution (24), for example, a base solution, through the porous medium to remove at least some of the catalyst promoter from the porous medium and produce a fourth solution (28) containing compounds having a catalyst promoter. Systems adapted to practice these processes are also disclosed. |
