Post-treatment for polymer pellets
AssigneeBasell Poliolefine Italia S.r.l.
InventorsPier Luigi Di Federico, Carlo Ciccarone, Luciano Michielin, Giuseppe Penzo
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Abstract
A continuous process for minimizing the agglomeration of freshly manufactured polyolefin pellets comprising the steps of: feeding an aqueous stream containing polyolefin pellets to a tower, cooling said polyolefin pellets during their upward flow along said tower by means of a downward flow of a cooling agent having a density higher than said polyolefin, collecting the cooled pellets from the top of said tower after a residence time in the tower comprised between 2 and 20 minutes.
Claims23
A continuous process for minimizing the agglomeration of freshly manufactured polyolefin pellets comprising the steps of:
- (a) feeding an aqueous stream containing polyolefin pellets to a tower having walls and a top, the polyolefin pellets having an upward flow along said tower;
- (b) cooling said polyolefin pellets during their upward flow along said tower by means of a downward flow of a cooling agent having a density higher than said polyolefin, thereby forming cooled pellets;
- and
- (c) collecting the cooled pellets from the top of said tower after a residence time in the tower between 2 and 20 minutes.
Dependencies are inferred from the claim text.