Verfahren zur Herstellung und zum Transportieren von Rieselfähigen Pellets aus Weichen Copolymeren

Details

Veröffentlichungs-Nr.

EP3243622

Aktenzeichen

EP16169647

Anmeldetag

13. Mai 2016

Veröffentlichung

9. September 2020

Erteilung

9. September 2020

Rechtsraum

EP

IPC

B29B9/06B29B9/12B29B9/16F26B17/00

Abstract

Process for hydraulic conveying of pellets of polyolefins comprising the steps of: (i) extruding molten polyolefin into strands and cutting the strands into pellets in an underwater pelletiser (A); (ii) withdrawing a first pellet suspension stream (1.1) from the underwater pelletiser; (iii) concentrating the first pellet suspension stream in a first pellet separator (B); (iv) passing the concentrated pellet stream (1.4) to a hydraulic conveying line through a first vessel (D) and mixing it with water thereby producing a second pellet suspension stream (1.5); (v) withdrawing the second pellet suspension stream from the first vessel and passing it to a second pellet separator (E); (vi) separating the pellets from water in the second pellet separator thereby creating a second water stream (1.6) and a dry pellet stream (1.10) and passing the second water stream back to the first vessel, characterised in that any one of the first or second pellet suspension streams or the dry pellet stream comprises an antiblock.

Anmelder

Firma

Borealis AG

Land

🇦🇹 Österreich

Fachgebiete