Process for the production of polyolefin pellets
AssigneeIneos Europe AG
InventorFrederic COUSIN
Life of this patent
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Abstract
A process for the production of polyolefin pellets in an extruder, and in particular a process for the production of polyolefin pellets which comprises i) passing polyolefin to a feed hopper of an extruder, ii) passing the polyolefin from the feed hopper to the extruder, and iii) pelletising the polyolefin in the extruder, characterised in that the polyolefin is contacted with water and oxygen prior to pelletising, and that the contact with oxygen takes place by contacting the polyolefin with a gas mixture comprising oxygen in the feed hopper of the extruder, the amount of oxygen being less than 500 ppm by weight relative to the polyolefin, the pressure in the feed hopper being less than 0.05 MPa and the residence time of the polyolefin in the feed hopper being less than 0.2 hours.
Claims15
A process for the production of polyolefin pellets comprising:
- i) passing polyolefin to a feed hopper of an extruder,
- ii) passing the polyolefin from the feed hopper to the extruder, and
- iii) pelletising the polyolefin in the extruder,
- wherein the polyolefin is contacted with water and oxygen prior to pelletising, and the contact with oxygen takes place by contacting the polyolefin with a gas mixture comprising oxygen in the feed hopper of the extruder, an amount of oxygen being less than 500 ppm by weight relative to the polyolefin, a pressure in the feed hopper being less than 0.05 MPa and a residence time of the polyolefin in the feed hopper being less than 0.2 hours.
Dependencies are inferred from the claim text.