Neutralizing Amine Blend — NA 660 C
A neutralizing amine is a volatile alkaline compound injected into distillation overhead systems to neutralize condensing acids and control corrosion. NA 660 C is CHIMI ART's buffered neutralizing amine blend for refinery and petrochemical overhead condensation equipment. It maintains overhead water pH at 5.5-6.5, neutralizes HCl carried over from the tower, and forms water-soluble salts that do not foul exchangers. Manufactured in Egypt and supplied in drums and IBCs.
Product Overview
A neutralizing amine is a volatile alkaline compound injected into distillation overhead systems to neutralize condensing acids and control corrosion. NA 660 C is CHIMI ART's buffered neutralizing amine blend for refinery and petrochemical overhead condensation equipment. It maintains overhead water pH at 5.5-6.5, neutralizes HCl carried over from the tower, and forms water-soluble salts that do not foul exchangers. Manufactured in Egypt and supplied in drums and IBCs.
Technical Specifications
- Appearance
- Clear liquid
- Concentration
- Neutralizing amine blend
- pH Range
- 5.5-6.5 (buffered)
- Solubility
- Water soluble
- Available Packaging
- 200L drums · 1000L IBC
- Shelf Life
- 12 months
- Storage Conditions
- Cool, dry place
| Property | Value |
|---|---|
| Appearance | Clear liquid |
| Concentration | Neutralizing amine blend |
| pH Range | 5.5-6.5 (buffered) |
| Solubility | Water soluble |
| Available Packaging | 200L drums · 1000L IBC |
| Shelf Life | 12 months |
| Storage Conditions | Cool, dry place |
Applications
Dosing Guidelines
NA 660 C is applied by continuous injection into the overhead system, using a chemical metering pump. The control target is the overhead water: dosing is adjusted to hold it at pH 5.5-6.5, based on routine overhead water analysis. Because chloride loading varies with crude slate and desalter performance, the feed rate is trial-based rather than fixed — start conservatively, monitor pH, chloride, and iron in the overhead water, and adjust in small steps. Our technical team can help define injection points, monitoring frequency, and a dosing protocol for your tower.
How It Works
During crude distillation, chloride salts in the feed hydrolyze to hydrogen chloride (HCl), which travels with the overhead vapor. Where the first water droplets condense — the initial condensation point — HCl dissolves into a very small volume of water, producing locally strong hydrochloric acid and severe low-pH corrosion of carbon steel. NA 660 C is a blend of neutralizing amines whose condensation profile closely matches that of water, so amine is present in those first droplets exactly where protection is needed. The amines react with HCl to form water-soluble amine hydrochloride salts and buffer the condensate in the 5.5-6.5 pH range. Because the resulting salts stay dissolved, they are flushed out with the overhead water rather than depositing as fouling. Continuous injection maintains this protective buffering across atmospheric and vacuum tower overhead systems.
Usage Tips
Store NA 660 C in tightly closed original containers in a cool, dry, well-ventilated area; shelf life is 12 months. Amine products are alkaline — keep them away from acids and strong oxidizers, and wear chemical splash goggles and gloves during transfer. Ensure good ventilation when opening containers, as amines have a characteristic odor. The formulation is water-soluble, which simplifies cleaning of dosing equipment; flush lines with water after maintenance. Consult the SDS before handling.
Certifications & Compliance
Frequently Asked Questions
What overhead water pH should be maintained with NA 660 C?
The product is designed to buffer overhead water in the 5.5-6.5 pH range — the window commonly targeted to limit both acid corrosion at low pH and salt or fouling issues at high pH. Dosing is adjusted against routine overhead water analysis.
Where is NA 660 C injected in the process?
By continuous injection into the overhead system — typically into the overhead vapor line upstream of the condensers — so the amine is present where the first water droplets condense. Your corrosion engineer selects the exact injection point for each tower.
Will NA 660 C cause fouling or amine salt deposits?
NA 660 C is formulated with a condensation profile similar to water, and the hydrochloride salts it forms are water-soluble, so they are carried away with the condensate instead of depositing — unlike some conventional amines that can foul exchangers.
Which units in a refinery use NA 660 C?
Atmospheric and vacuum distillation tower overheads and similar condensation equipment in refineries and petrochemical plants — wherever condensing HCl and other acid gases threaten low-pH corrosion.
How should NA 660 C be stored and for how long?
Keep it in closed original containers in a cool, dry, ventilated area away from acids and strong oxidizers. Shelf life is 12 months under these conditions.
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