Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

DOW DOWSIL 9902 Defoamer

DOW DOWSIL 9902 is a siloxane-based petroleum defoamer with advanced thermo-mechanical attributes. The colorless-to-pale amber liquid (1,000-5,000 mPa·s) performs stably at pH 1-14 and ≤150°C, reducing foam by 45% at 0.1%-0.5% dosage. ISO 9001/REACH-certified, it boosts oil-gas separation efficiency by 20% in high-salinity extraction and lowers equipment corrosion risks.

Product Information of DOW DOWSIL 9902 Defoamer

  1. Harsh Environment Resistance: Maintains stability in H2S-containing sour oil wells and 150°C thermal recovery systems.

  2. Quick Foam Collapse: Nano-silicone particles break foam in 15 seconds (meets ASTM D892 standards).

  3. Wide Compatibility: Avoids phase separation in brine and hydrocarbon mixed systems.

  4. Eco-Friendly Traits: APEO/VOC-free, with a biodegradability rate of ≥90%.

  5. Cost Savings: Cuts per-ton crude oil treatment cost by 18%.

Areas of Application of DOW DOWSIL 9902 Defoamer

  1. Oil Drilling: Manages gas-cut foam in pH 8-12 drilling muds.

  2. Refining Process: Eliminates coking foam in 450-500°C delayed cokers.

  3. Gas-Liquid Separation: Reduces microfoam in three-phase separators.

  4. Produced Water Handling: Defoams high-TDS wastewater (≥50,000 ppm).

  5. Chemical Coordination: Improves lubrication and corrosion inhibition in pipelines.

Specifications Of DOW DOWSIL 9902 Defoamer

ype
Siloxane-based defoamer
Appearance
Colorless to pale amber liquid
Active Content
Polydimethylsiloxane + hydrophobic silica (100%)
Dynamic Viscosity
1,000-5,000 mPa·s
pH Range
1-14
Flash Point
>150°C (closed cup)
Surface Tension
22.5 dyn/cm
Density
0.96-1.02 g/cm³
Thermal Stability
No stratification (150°C/24h)
Recommended Dosage
0.1%-0.5% (by total weight)
Shelf Life
24 months (sealed, 5-40°C)
Packaging
200kg/galvanized drum or bulk bags


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