FULLY REFINED PARAFFIN WAX: THE HIGH-PERFORMANCE HYDROCARBON FOR DIVERSE INDUSTRIES
Fully refined paraffin wax is a highly purified, white, odorless solid hydrocarbon derived from petroleum, with a carbon chain length of C₂₀-C₄₀. With 99%+ purity and oil content below 0.5%, this premium wax serves critical functions in food packaging, cosmetics, candles, and industrial applications. The global market exceeds 4 million metric tons annually, driven by its exceptional stability and versatility.
Key Properties & Specifications
Physical & Chemical Characteristics
- Melting Point: 58-72°C (varies by grade)
- Oil Content: ≤0.5% (fully refined)
- Penetration (25°C): 10-20 dmm (ASTM D1321)
- Color: White (Saybolt +30)
- Odor: Odorless (critical for food/pharma)
Technical Grades
Grade | Melting Range | Oil Content | Key Applications |
Food Grade | 60-62°C | ≤0.5% | Cheese coating, gum base |
Candle Wax | 58-60°C | ≤0.8% | Premium container candles |
Cosmetic | 62-65°C | ≤0.3% | Lip balms, creams |
Industrial | 66-70°C | ≤1.0% | Rubber, PVC lubricant |
Production Process
1. Feedstock Preparation
- Slack Wax: Byproduct of lubricant oil refining (10-30% oil)
- Deoiling: Solvent (MEK/toluene) or sweating process
2. Refining Steps
- Hydrotreating: Removes sulfur/nitrogen compounds
- Clay Treatment: Bleaching for color improvement
- Filtration: Final polishing
3. Quality Control
- Congealing Point (ASTM D938)
- Oil Content (ASTM D721)
- FDA Compliance: 21CFR172.886/178.3710
Major Applications
1. Food & Packaging (25% Market)
- Cheese Coating:
- 50-100μm layer prevents moisture loss
- Meets FDA 21CFR172.886
- Chewing Gum:
- 5-8% wax base improves elasticity
2. Candle Manufacturing (40%)
- Premium Candles:
- 100% paraffin or blended formulas
- Burn time: 7-10g/hour (standard wick)
- Additive Compatibility:
- Up to 10% fragrance load
3. Cosmetics & Pharma
- Lipsticks:
- 5-15% wax provides structure
- Ointments:
- USP-grade forms occlusive barrier
4. Industrial Uses
- Rubber Compounding:
- 1-3% improves mold release
- PVC Lubricant:
- 0.5-1.0phr reduces friction
- Investment Casting:
- Pattern material blends
Performance Comparison
Parameter | Fully Refined | Semi-Refined | Microcrystalline |
Oil Content | ≤0.5% | 0.8-2.0% | 3-8% |
Odor | None | Slight | Moderate |
Flexibility | Low | Medium | High |
Price ($/ton) | 900-1,200 | 600-900 | 1,300-1,800 |
Market Dynamics
Global Production
- Top Producers:
- China (35%)
- ExxonMobil, Sasol, Shell
- Price Trends:
- Linked to crude oil +$300/ton premium
Emerging Trends
- Bio-Based Alternatives:
- Soy/carnauba wax blends
- Recycled Paraffin:
- From waste candle recovery
- High-Melt Grades:
- For tropical climate products
Safety & Compliance
✅ Non-Toxic:
- GRAS status (FDA)
- EU Food Contact Material 10/2011
⚠ Handling:
- Dust explosion risk (ST1 class)
- Melt handling >100°C requires PPE
♻ Environmental:
- Readily combustible
- Non-biodegradable but recyclable
Conclusion
Fully refined paraffin wax remains the gold standard for purity-demanding applications, from food coatings to luxury candles. As sustainability pressures grow, the industry is responding with recycling initiatives and bio-hybrid solutions while maintaining the unmatched performance of petroleum-derived paraffin.