Processes for recovering rhodium from hydroformylation processes
AssigneeDow Technology Investments LLC
InventorsMichael A. Brammer, Yujun Liu, Amarnath Singh, Glenn A. Miller, Adrian Francis Backes, Michael Betham
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Abstract
The process disclosure relates to processes for recovering rhodium from a hydroformylation process. In one aspect, a tails stream from a product-catalyst separation zone is provided to at least one organic solvent nanofiltration separation membrane, wherein a final permeate stream exits a final organic solvent nanofiltration separation membrane, wherein the rhodium concentration in the final permeate stream is lower than the rhodium concentration in the tails stream. The permeate stream is incinerated on-site to create a rhodium-containing ash.
Claims9
A process for recovering rhodium from a hydroformylation process that comprises producing at least one aldehyde in a reaction zone, the reaction zone comprising a C6 to C22 olefin, hydrogen and carbon monoxide in the presence of a catalyst, wherein the catalyst comprises rhodium and an organophosphorus ligand, the process comprising:
- (a) receiving a tails stream from a product-catalyst separation zone, wherein the tails stream comprises aldehydes, heavies, rhodium, and an organophosphorous ligand;
- (b) providing at least a portion of the tails stream to at least one organic solvent nanofiltration (OSN) separation membrane, wherein a final permeate stream exits a final OSN separation membrane, the final permeate stream comprising aldehydes, heavies, rhodium, and an organophosphorous ligand, wherein the rhodium concentration in the final permeate stream is lower than the rhodium concentration in the tails stream;
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- (c) incinerating the final permeate stream on-site to create a rhodium-containing ash.
Dependencies are inferred from the claim text.