Propylene recovery and N₂ purification in PP plant
Problem:
The vent gas from resin degassing bin typically contains approximately 10+%(V) propylene and 70-85%(V) nitrogen. For a 300 KTA PP plant, the hydrocarbons and nitrogen losses in the vent gas are close to US$ 1.2 -2.0 million per year. Eurofilm's patent technologies have been applied successfully for the following processes:
• Innovene of INEOS (UK)
• Novolen of Lummus Novolen (GER)
• Horizone (Chisso) of JPP (JP)
• Unipol of Dow (USA)
Performance:
• Propylene recovery: 90-97%
• N2 recovery: 70-80%
• N2 purities: 95-99+ mol%
Operating characteristic:
• Min. operating temperature: lower to -30°C
• Max. operating pressure: up to 25 barg
Scope of supply:
• Compressor
• Dehydration (upon request)
• Condenser refrigeration (upon request)
• HCs membrane unit
• H2 membrane unit
Standards:
• Compressor: API 619
• Lubrication, Shaft-sealing and Oil-control Systems and Auxiliaries: API 614
• Machine Protection Systems: API 670
• Mechanical Seals and Supply Systems: API 682
• Pressure vessel: ASME, TEMA
• Electrical: IEC or NEC
• ISO 9001 certified process
• Hazardous (ATEX/Class Div2)
References:
Location: Japan
End user: Mitsuishi Chemical
Capacity of PP: 300,000 tons/year
Technology: Amoco/JPP
Propylene recovery: ≥90%
N2 purities: >99 mol%
Location: Nigeria
End user: Dangote
Capacity of PP: 830,000 tons/year
Technology: Innovene/INEOS
Propylene recovery: 97-99%
N2 purities: ≥98.5 mol%
N2 recovery: 70-80%
Location: Taiwan, China
End user: FCFC
Capacity of PP: 300,000 tons/year
Technology: Chisso/JPP
Propylene recovery: >95%
N2 purities: >99 mol%
N2 recovery: >60%
Location: China
End user: Exxon-Mobil/Aramco
Capacity of PP: 550,000 tons/year
Technology: Novolen/Lummus
Propylene recovery: 92-98%
N2 recovery: 60-80%
Location: China
End user: Shenhua
Capacity of PP: 600,000 tons/year
Technology: Novolen/Lummus
Propylene + ethylene recovery: ≥92%
N2 recovery: 60-80%
Address: No. 17, Qinglong Street, Lushunkou Longtou Industrial Zone, Dalian
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