Process for removing iron-and rhodium-containing catalyst residues from hydrogenated nitrile rubber
AssigneeBayer Aktiengesellschaft
InventorsPaul Nguyen, Harald Bender, Gilles Arsenault, Ignazio Spadola, Franz-Josef Mersmann
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Abstract
A process is provided for the removal of iron- and rhodium-containing residues from a solution of hydrogenated nitrile rubber. The process utilizes an ion-exchange resin having thiourea functional groups. Further, the resin is both macroporour and monodispersed. The process removes both rhodium and iron from viscous rubber solutions. In a preferred embodiment, the process is carried out in an ion-exchange column.
Claims11
A process for the removal of iron- and rhodium-containing catalyst residues from hydrogenated nitrile rubber which comprises the step of treating a solution of hydrogenated nitrile rubber containing such residues with a homodispersed, macroporous, cross-linked styrene-divinylbenzene copolymer resin having thiourea functional groups.
Dependencies are inferred from the claim text.