Propylene and nitrogen recovery system for industrial applications
Enhance your production efficiency by recovering high-value gases like propylene and nitrogen with a system designed to maximize recovery rates and ensure product purity, minimizing waste and achieving sustainable operations.

The BORSIG Propylene and Nitrogen Recovery Unit is a sophisticated solution designed for petrochemical producers and industrial gas processors seeking efficient separation and purification processes. Utilizing a strategic combination of compression, condensation, and membrane separation, this unit excels in recovering propylene and high-purity nitrogen from process streams. Applications range across polypropylene production, gas processing, and chemical manufacturing, delivering end-products like polypropylene resin and liquid nitrogen.
This unit operates continuously and is engineered for high reliability and quick installation. Its modular package unit design allows easy integration into existing facilities, supporting retrofit deployments. By using hydrocarbon-selective membranes alongside optional hydrogen-selective stages, you benefit from recovery rates exceeding 95% for propylene and nitrogen purity over 99 mol%. The system reduces energy consumption and minimizes emissions, aligning with environmental and economic objectives.
Available in various materials to resist corrosion, BORSIG’s Recovery Unit ensures compatibility with demanding industrial conditions. It is supported by comprehensive membrane services and complies with industry standards, offering an innovative edge in energy and environmental solutions within the chemical and energy sectors.
Benefits
- Achieves over 95% recovery rates, maximizing valuable resource utilization.
- Reduces operational costs with low-maintenance, reliable design.
- Integrates seamlessly into existing systems for cost-effective retrofitting.
- Enhances product quality with high-purity nitrogen and propylene output.
- Minimizes emission-related environmental impact, aligning with sustainability goals.
- Applications
- Chemical processing,Chemical manufacturing,Plastic production,Oil and gas,Petrochemicals,Energy sector,Industrial emissions,Polypropylene production,Gas processing,Environmental solutions
- End products
- Recycled propylene,Fuel gas,Liquid nitrogen,Polypropylene resin,Hydrocarbon mixtures,Monomers,Ethylene glycol,Organic solvents,Seal gases,Captured carbon,Ethylene oxide,High-purity nitrogen gas
- Steps before
- Purge gas compression,Condensation,Cooling agent application,Degassing,Condensate separation
- Steps after
- Nitrogen purification,Propylene permeate recycling,Hydrogen-selective membrane installation,Flare disposal of lighter components
- Input ingredients
- purge gas stream,cooling agent,liquid propylene,inert gases,propylene,condensate,permeate stream
- Output ingredients
- propylene-rich permeate stream,purified nitrogen stream,recovered propylene,propylene in liquid state,propylene in gaseous state,lighter components to flare
- Recovery rate
- > 95% propylene
- Purity
- > 99 mol% nitrogen
- Pressure difference
- Resulting pressure difference across membrane
- Membrane type
- Hydrocarbon and hydrogen selective
- Condensation method
- Cooling with cooling agent or liquid propylene
- Dryer system required
- For some PP production licenses
- Package unit design
- Quick installation and easy implementation
- Working mechanism
- Hydrocarbon-selective membrane
- Integrated steps
- Compression,condensation,membrane separation
- Batch vs. inline flow
- Continuous inline
- Purification stages
- Hydrogen-selective membrane stage
- Pressure differential
- Via compressor's suction side
- Recovery rates
- > 95% propylene
- Purity
- > 99 mol% nitrogen
- Energy efficiency
- Low maintenance,high reliability
- System integration flexibility
- Easy add-on for existing and new systems
- Automation level
- Tailor-made design
- Adaptability
- Retrofit design
- Density/particle size
- 0.5–2.5 g/cm³ / 50–1000 µm
- Machine footprint
- Compact design for easy integration
- Shape and size
- Tailor-made design for existing and new installations
- Feed method
- Compressed and condensed purge gas stream
- Discharge method
- Purge gas fed into membrane system
- Customization options
- Adaptation to existing plants (retrofit design) feasible
- Tailor-made design
- Yes
- Retrofit design
- Adaptation to existing plants
- Package unit design
- Quick installation and easy implementation
- Membrane System Integration
- Hydrocarbon,hydrogen-selective stages
- Market info
- BORSIG is known for its expertise in manufacturing high-quality industrial engineered-to-order (ETO) equipment, including pressure vessels, heat exchangers, and compressors, with a strong reputation for engineering excellence and reliability in the petrochemical and chemical industries.