Refined Grade or Specialty Grade LPG is a high-purity liquefied petroleum gas manufactured through advanced refining, fractionation, and purification processes to achieve exceptionally low impurity levels and precise compositional control.
Unlike standard commercial or industrial LPG, this grade is designed for critical applications where fuel consistency, cleanliness, and chemical stability are essential.
It is widely used as a process gas, propellant, feedstock, and laboratory fuel in aerosols, petrochemicals, pharmaceuticals, electronics, specialty chemicals, coatings, and research environments.
Chemical Composition & Purity Levels
Primary Components:
High-purity Propane (C₃H₈), Butane (C₄H₁₀), or tailored blends
Typical Purity: ≥ 99.5% – 99.9%
Sulfur Content: < 5 ppm (often < 1 ppm)
Moisture Content: < 10 ppm
Olefin Content: Trace or Nil
Aromatic & Acidic Gases: Virtually absent
Odorization: Often odor-free
This ultra-clean composition prevents catalyst poisoning, corrosion, residue formation, and process contamination.
Key Characteristics of Refined / Specialty Grade LPG
High Purity & Chemical Stability
Non-corrosive, chemically stable, and suitable for precision environments.
Controlled Propane–Butane Ratio
Custom-blended compositions with precise control over vapor pressure, volatility, and boiling point.
Excellent Volatility & Flame Quality
Clean, odor-free flame with no soot or smoke.
Batch-to-Batch Consistency
Produced under ISO-controlled conditions with full traceability and certification.
Typical Mechanical & Technical Properties
| Property | Typical Value |
|---|---|
| Purity | ≥ 99.5% |
| Sulfur Content | < 5 ppm |
| Moisture Content | < 10 ppm |
| Olefins | Trace / Nil |
| Calorific Value | 46 – 50 MJ/kg |
| Boiling Point | Propane: –42°C / Butane: –0.5°C |
| Vapor Pressure @ 20°C | Precisely controlled |
| Liquid Density | 0.50 – 0.58 kg/L |
| Flammability Range | 2% – 10% in air |
| Appearance | Colorless, odor-free |
| Storage State | Liquefied under pressure |
Advanced Refining & Production Process
Feedstock Recovery: Extracted from crude oil refining streams and NGLs.
Deep Fractionation: Precise separation of propane, iso-butane, and n-butane.
Hydrotreating: Removal of sulfur compounds, olefins, and trace contaminants.
Molecular Drying: Achieves ultra-low moisture levels using molecular sieves.
Stabilization & Blending: Custom vapor pressure and boiling range control.
Quality Assurance: GC analysis, batch certification, ASTM / ISO / EN compliance.
Available Forms & Supply Modes
High-Purity Cylinders
5 kg, 10 kg, 33 kg laboratory-grade vessels
Bulk & ISO Tanks
Dedicated tanks with contamination-free logistics
Customized Blends
Propane-only, Butane-only, or specialty blends
Applications of Refined / Specialty Grade LPG
Aerosol Industry: Pharmaceutical and personal care propellants
Chemical & Petrochemical: Feedstock for alkylation and specialty synthesis
Laboratories: GC-FID flame sources and calibration gases
Pharmaceuticals: GMP-compliant manufacturing processes
Coatings & Adhesives: Controlled evaporation and solvent replacement
Electronics: Clean heating with zero residue
Advantages Over Commercial LPG
| Parameter | Specialty LPG | Commercial LPG |
|---|---|---|
| Purity | Very High | Moderate |
| Sulfur | Ultra-Low | Higher |
| Moisture | Extremely Low | Variable |
| Odor | Odor-Free | Odorized |
| Composition Control | Precise | General |
| Application | Sensitive / Critical | General Use |
Safety, Handling & Compliance
Stored in certified pressure vessels with dedicated pipelines and contamination-free logistics.
Complies with ISO quality systems, ASTM LPG specifications, and industry-specific safety standards.
Refined / Specialty Grade LPG is a premium, high-purity energy and process gas engineered for precision, consistency, and cleanliness in high-value, regulated, and sensitive industrial applications.