Older demulsifiers often left a sticky "rag layer" at the interface. Nalco 3688 is formulated to minimize sludge build-up, keeping separator interfaces clean.
| Feature | Nalco 3688 | Sodium Sulfite | Hydrazine | | :--- | :--- | :--- | :--- | | Solids Contribution | Zero | High (adds TDS) | Zero | | Reaction Speed | Fast | Moderate to Slow | Moderate | | Safety | Moderate (Irritant) | Low (Safe) | High (Carcinogen) | | Passivation | Excellent | Poor | Excellent | | Pressure Limit | High Pressure | Low/Med Pressure | Any Pressure |
Proper dosing is critical. Nalco 3688 is not a "dump and forget" chemical. For typical open cooling systems, the target residual concentration is: nalco 3688
Nalco 3688 is not a magic bullet, but for medium to heavy crude oil emulsions stabilized by natural surfactants, it is arguably the benchmark product. Its ability to function in low heat environments and resolve "rag layers" that other chemicals ignore makes it invaluable for mature fields and cold climates.
The Verdict:
Before ordering a tote, always request a fresh bottle test kit from your Nalco representative. Emulsions age; last year's formula may not work on today's crude.
Disclaimer: This article is for informational purposes only. Always consult a qualified chemical engineer and review the current Nalco Safety Data Sheet before handling or injecting any production chemical. Older demulsifiers often left a sticky "rag layer"
Nalco 3688 is a high-performance, single-component oxygen scavenger and metal passivator developed by Nalco Water (an Ecolab company). It is widely used in industrial boiler systems to prevent corrosion.
This guide covers the product's function, application, benefits, and handling. Before ordering a tote, always request a fresh