Removal of hydrogenation catalyst from polymer solutions by cata

Details Removal of hydrogenation catalyst from polymer solutions by cata Removal of hydrogenation catalyst from polymer solutions by cata

1990-06-14

1993-05-18

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528492, 210729, C08F 608

Patent

active

052122859

ABSTRACT:
A process is provided comprising the steps of contacting a Group VIII metal hydrogenation catalyst residue containing polymer solution with a chelating resin, the chelating resin comprising iminodiacetate ions, and recovering a polymer solution comprising less than 5 ppm by weight, based on the solution, of the hydrogenation catalyst residue metal. In a preferred embodiment, the chelating resin is contacted with the hydrogenation catalyst residue containing polymer solution by mixing particles of the chelating resin with the hydrogenation catalyst residue containing polymer solution under agitation, and the polymer solution containing less than 5 ppm of hydrogenation catalyst metals is recovered from the chelating resin and resulting precipitated hydrogenation catalyst residues by filtration.

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