1. Food-Grade Calcium Chloride
Specifications:
- Purity: ≥94% CaCl₂ (FCC Grade)
- Heavy Metals: <10 ppm (Pb <2 ppm)
- Arsenic: <3 ppm
- Alkalinity: <0.2% as NaOH
- pH (5% solution): 7.2-8.5
- Particle Size: 80% passing 20 mesh
- Storage: Hermetic containers at <25°C/60% RH
Dosage Guidelines:
- Cheese making: 0.02-0.04% of milk volume
- Vegetable processing: 1-3% brine solution
- Bottled water: 10-30 mg/L calcium content
2. Oilfield Drilling Fluid Additive
Technical Parameters:
- Brine Density: 1.32-1.38 g/cm³ (11.0-11.5 ppg)
- Concentration: 28-32% by weight
- Crystallization Point: -50°C to -55°C
- pH: 6.5-8.5
- Impurities:
- Br⁻ <100 ppm
- SO₄²⁻ <500 ppm
- Total insolubles <0.1%
Field Application:
- Mixing: Requires high-shear mixer (3000+ rpm)
- Compatibility: Avoid mixing with sulfate-based fluids
- Corrosion Control: Requires additional inhibitors at >25% concentration
3. Wastewater Treatment
Treatment Specifications:
- Dosage: 50-200 mg/L for phosphate removal
- Reaction Time: 15-30 minutes
- Optimal pH: 8.5-10.0
- Sludge Production: 1.5-2.0 kg sludge/kg P removed
- Residual Calcium: <200 mg/L (to prevent scaling)
System Requirements:
- Mixing Energy: 30-60 sec⁻¹ velocity gradient
- Flocculation Time: 20-40 minutes
- Settling Rate: 1.0-2.5 m/h
Comparative Analysis Table
| Parameter | Food Grade | Oilfield Grade | Wastewater Grade |
|---|---|---|---|
| Purity | ≥94% | ≥77% | ≥90% |
| Particle Size | 20-80 mesh | Powder/Solution | 10-100 mesh |
| Solubility (20°C) | 74g/100mL | 45g/100mL | 70g/100mL |
| Bulk Density | 0.85-1.05 g/cm³ | 1.2-1.4 g/cm³ | 0.95-1.15 g/cm³ |
| Packaging | 25kg bags | IBC totes | Bulk or 50kg bags |
Quality Control Measures:
- Food Grade:
- Microbial testing (TPC <1000 CFU/g)
- Kosher/Halal certification available
- Regular heavy metal screening
- Oilfield Grade:
- Daily density calibration
- Corrosivity testing (NACE Standard TM0169)
- Crystallization point verification
- Wastewater Grade:
- Jar testing for dosage optimization
- Monthly impurity profiling
- Settleability testing
