Silver recovery device and process
AssigneeAgfa-Gevaert
InventorsBenedictus Jansen, Frank Michiels, Werner Van de Wynckel
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Abstract
A silver recovery device (30) is described for removing silver from a silver-containing solution. The device (30) comprises an ion-exchange resin bed (34) and a pump (62) for directing the solution through the resin bed (34). The pump (62) is positioned downstream of the resin bed (34) and the resin bed (34) is held within a retaining space (36) of variable dimensions. Higher liquid flow rates are thereby achievable, without fluidization of the resin.
Claims8
A process for removing silver from a silver-containing solution, comprising:
- using a pump to direct the solution through an ion-exchange resin bed, with the pump being positioned downstream of the resin bed, the resin bed being held within a retaining space of variable dimension, and the dimension being variable in response to flow rate of liquid passing through the resin bed so as to restrain fluidization of the resin.
A silver recovery device for removing silver from a silver-containing solution, comprising an ion-exchange resin bed disposed within a retaining space, and a pump means for directing a flow of the solution through the resin bed, wherein:
- the pump means is positioned downstream of the resin bed, and
- a dimension of the retaining space is variable in response to flow rate of liquid passing through the resin bed.
An apparatus for processing photographic material, comprising a plurality of wet treatment stations including a rinsing station comprising a silver recovery device for removing silver from rinsing water, and wherein
- the silver recovery device comprises an ion-exchange resin bed and a pump for directing the rinse water through the resin bed, the pump being positioned downstream of the resin bed, the resin bed being held within a retaining space of variable dimension, and the dimension being variable in response to flow rate of liquid passing through the resin bed.
Dependencies are inferred from the claim text.