Process for removing iron-and rhodium-containing catalyst residues from hydrogenated nitrile rubber

US6646059B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Paul Nguyen · London, CA
• Harald Bender · Sarnia, CA
• Gilles Arsenault · Courtright, CA
• Ignazio Spadola · Sarnia, CA
• Franz-Josef Mersmann · Bensberg, DE

Key dates

• Filing date: Nov 2, 2001
• Grant date: Nov 11, 2003
• Expiry date: Nov 2, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08C2/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.