Catalyst system for controlled polymerization

Details Catalyst system for controlled polymerization Catalyst system for controlled polymerization

2007-01-02

2007-01-02

Harlan, Robert D. (Department: 1713)

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

Synthetic resins

Removing and recycling removed material from an ongoing...

C526S069000, C526S070000, C526S127000, C526S160000, C526S172000, C526S348600, C502S152000, C502S155000, C502S167000

Reexamination Certificate

active

10860807

ABSTRACT:
Disclosed is a process for the removal and recycle of a supported transition metal catalyst complex from a polymerization reaction medium comprising the steps separating the supported transition metal catalyst from the reaction medium and contacting the supported transition metal catalyst with a reducing agent. The reducing agent may be a transition metal and/or a source of radicals. Also disclosed is a process for the recovery of transition metal catalyst from a reaction medium, comprising changing the conditions of a medium comprising transition metal catalyst attached to a solid support, wherein changing the conditions causes desorption of the transition metal catalyst from solid support.

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