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HDPE Manufacturing

 

PE Manufacturing

 

Ethylene is combined with a small amount of co-monomer (butene) & solvent in a reactor with catalyst。 Solvent cyclohexane (or isobutane), is removed from the reactor and sent to solvent recovery. The solvent is used to prevent the viscosity of the reaction mass from getting too high. PE polymer goes to the extruder, then the pelletizer.
 

Contaminations

 

Solid & semi-solids contaminant can be introduced into process or created during manufacturing:

• Feedstock

• Process streams

• Monomer storage

• The reactor

• Solvent recovery system

• Contaminants be retained in pelletized PE polymer can cause visible contamination and product rejections particularly in blown or extruded thin gauge film

 

Recommendation

 

A:  FCN   10um
B:  FCN   40um
C:  PT   10um
D:  Jumbo  5-10um

 

Benefit

 

• Lower filter disposal costs
• Reduced maintenance expense on distillation column downstream of filters
• Reduced exposure to catalyst

• Improved HDPE product quality, because of improved hexane quality

 

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