Transition metal recovery
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsAnthony G. Abatjoglou, David R. Bryant
Life of this patent
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Abstract
A method for recovering a transition metal such as rhodium from a polar or non-polar liquid by contacting said transition metal-containing liquid with an ion-exchange resin having bonded ionically thereto an organophosphorus ligand; the transition metal can be eluted from the bed using a liquid containing a sufficient concentration of organophosphorus ligand.
Claims17
A method for recovering Group VIII transition metal from a transition metal-containing liquid which comprises
- (i) contacting said transition metal-containing liquid with an ion-exchange resin wherein said resin has a first organophosphorus ligand bonded ionically thereto, to cause transition metal to be removed from the liquid and bound to the resin, and
- (ii) thereafter contacting said resin with a liquid containing a sufficient quantity of a second organophosphorus ligand to remove transition metal from the resin.
An ion-exchange resin having an organophosphorus ligand bonded ionically thereto.
A method for recovering rhodium from an aldehyde product of a hydroformylation process, wherein said aldehyde product contains 2 ppm or less of rhodium, which comprises
- (i) contacting said aldehyde product with an ion-exchange resin, wherein said resin has an ionic organophosphorus ligand bonded ionically thereto, to cause rhodium to be removed from the liquid and bound to the resin, and
- (ii) thereafter contacting said resin with a liquid containing a sufficient quantity of said ionic organophosphorus ligand to remove rhodium from the resin and regenerate the resin for reuse.
Dependencies are inferred from the claim text.