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.