دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: the units in a refinery that produce ethylene and propylene, both for the polymer units (to make polyethylene and polypropylene) and for sale to other chemical and plastics producers.

n pi: units in a refinery that polymerize propylene and ethylene in the presence of a catalyst and in a liquid solvent. Polypropylene and polyethylene are produced. Following polymerization, the product is removed from the reactor and processed through a purification facility for removal of catalyst residue and separation of the sol vent. The powdered product is then conveyed in a pneumatic conveyor to the finishing area, where additives are blended with powder and the mixture is processed through an extruder to form pellets.