Recycling process for moulded catalyst bodies
View Patent ↗Process for removing the noble metal from noble metal-containing moulded catalyst bodies, comprising these steps of A leaching the noble metal from loosely heaped moulded catalyst bodies, B removing the mother liquor, C automated conveying of the moulded bodies into a centrifuge, D renewed leaching, E separating off of the residual mother liquor by centrifuging.
1. Process for removing the noble metal from noble metal-containing moulded catalyst bodies comprising the steps of
(a) leaching the noble metal from loosely heaped moulded catalyst bodies,
(b) removing a mother liquor,
(c) automatically conveying of the moulded bodies into a centrifuge,
(d) renewed leaching,
(e) separating off of the residual mother liquor by centrifuging.
2. Process according to claim 1 , wherein the noble metal is silver and the moulded catalyst bodies are silver-containing.
3. Process according to claim 2 , wherein nitric acid is used for leaching.
4. Process according to claim 1 wherein step B comprises draining, pumping off or sucking off.
5. Process according to claim 1 wherein, step C is carried out by screw conveying or vibration channel.
6. Process according to claim 1 wherein, steps D and E and optionally B are carried out in a pull action filter or inverted filter centrifuge.
7. Process according to claim 1 wherein, steps D and E take place discontinuously.