ENRICHMENT PROCESS FOR A PGM-METALS CONTAINING STREAM
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Abstract
The invention provides an enrichment process for a PGM-group metals containing stream, said process including the steps of contacting activated carbon particles with a PGM-rich stream by contacting the stream with a batch of the particles on a continuous basis, whereby at least some of the PGM-group metals are adsorbed from the stream onto active surface sites of the activated carbon and a PGM-metals depleted stream passes out of contact with the activated carbon batch, thereafter stripping the PGM-group metals from the activated carbon batch by means of a concentrated HCl solution as stripping agent, wherein the stripping agent is contacted with the activated carbon batch on a continuous flow basis and the PGM-group metals loaded stripping agent is removed from contact with the activated carbon from which the PGM-group metals have been stripped, and then regenerating the activated carbon batch by washing with water and, if necessary, reactivating the carbon particles.
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Citations
36 Claims
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1-16. -16. (canceled)
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17. An enrichment process for a stream containing platinum group metals, comprising:
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contacting, on a continuous basis, a batch of activated carbon particles with a platinum group metal-containing stream, whereby at least a portion of the platinum group metal is adsorbed from the platinum group metal-containing stream onto active surface sites of the activated carbon particles so as to generate a platinum group metal-depleted stream; passing the platinum group metal-depleted stream out of contact with the batch of activated carbon particles with adsorbed platinum group metal; contacting, on a continuous basis, the batch of activated carbon particles with adsorbed platinum group metal to a concentrated HCl solution stripping agent, whereby a platinum group metal-loaded stripping agent is generated; removing the platinum, group metal-loaded stripping agent from contact with the batch of activated carbon particles from which the platinum group metal has been stripped; and regenerating the activated carbon particles from which the platinum group metal has been stripped by washing with water. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification