Ethylene recovery in EO/EG plant

Problem:

The venting from reactor loop gas to avoid the build-up of argon will inevitably cause the loss of ethylene and methane. For a 300kta PE plant, ethylene loss in the vent gas is close to 200-400 tons/year. Eurofilm's membrane technology has been applied widely for the following processes:

Applications:

• SD (USA)

• Shell (NL)

• Dow (USA)

Performance:

• Ethylene recovery: 80-90%

• CH₄ recovery: 70-80%

Scope of supply:

• Compressor (upon request)

• HCs membrane unit

Standards:

• Pressure vessel: ASME, TEMA

• Electrical: IEC or NEC

• ISO 9001 certified process

• Hazardous (ATEX/Class Div2)

References:

Location: USA

End user: ExxonMobil/SABIC

Technology: SD

Ethylene recovery: >88.2 %

Argon removal: >136 kg/hr

 

Location: Saudi Arabia

End user: SABIC

Technology: SD

Ethylene recovery: >91.6%

Argon removal: >18 kg/hr

CO₂ removal: >74 kg/hr

 

Location: Japan

End user: Mitsuishi Chemical

Technology: Shell

Ethylene recovery: >80%

Argon removal: >25 kg/hr

 

Location: China

End user: SINOPEC

Technology: Shell

Ethylene recovery: > 88.5%

Argon removal: > 125 kg/hr