C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/419, 402/585
C08F 6/08 (2006.01) C08F 6/02 (2006.01) C08F 10/02 (2006.01) C08F 210/18 (2006.01)
Patent
CA 1070050
ABSTRACT OF THE DISCLOSURE Removal of dissolved vanadium catalyst residues from ? -olefin polymer solutions improves the heat stability of the polymer recovered therefrom. Vanadium residues are removed from ?-olefin polymer solutions in inert solvents by contacting the solutions at 50-225°C. with one or more active metals, either in their elemental form or as alloys, selected from alkali metals, aluminum, and zinc, and separating the solutions from vanadium residues precipit- ated thereby. The process can be carried out continuously by passing the polymer solution through a column containing the active metal.
246641
E.i. Du Pont de Nemours And Company
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