REMOVAL OF METAL CONTAMINANTS FROM POLYETHYLENE

摘要

A process to remove metal contaminants from a hydrocarbon solution of polyethylene is disclosed. The process comprises adding a primary alcohol and a ß-diketone to a solution of polyethylene at a temperature within the range of 120°C to 300°C and contacting the solution with basic alumina. The process removes metal contaminants and minimizes degradation and condensation products, which can have a detrimental effect on polyethylene properties. The process provides polyethylene with low metal residues and good properties.