Butene-1 Production Unit
The Butene-1 production facility is a critical component of Iran’s petrochemical value chain, specializing in:
• Annual capacity: 120,000 metric tons
• Product grades: Polymer-grade (≥99.5% purity) for LLDPE co-monomer
Feedstock: Mixed C4 streams from steam crackers
Project Specification
Key Specifications
Core Technology
▸ Licensed Process:
- Lummus CATOFIN®or Axens Butamer™ technology
- Extractive distillationwith NMP solvent
- Selective hydrogenationfor impurity removal
▸ Key Units:
- C4 pre-treatment section
- Butene-1 extraction columns
- Product stabilization system
Project Details
Project Details
Technical Specifications
✔ Process Conditions:
- Extraction columns: 50-70°C, 5-8 bar
- Hydrogenation: 80-120°C, 15-20 bar
- Product specs: ≤50 ppm butadiene
✔ Utility Consumption:
- Steam: 1.2 t/t product
- Cooling water: 80 m³/t product
- Power: 15 MW
Operational Challenges
Feedstock variability from different cracker sources
Solvent degradation in extraction system
Butadiene removal efficiency
Product storage stabilization (inhibitor injection required)
Market Position
- Domestic consumption: 80% for LLDPE production
- Export potential: Regional markets
- Competitive advantage: Integration with cracker complexes
Sustainability & Expansion
☆ Waste reduction: 98% C4 utilization
☆ Future projects:
- Capacity expansion to 150,000 t/y
- On-purpose butene-1 from ethanol
- Digital twin implementation
SEC Scope:
- Design + Material take-off + Fabrication Drawing Preparation for 22 Units Pressure Vessel 160 Tons