What Is Ethanol Diisopropanolamine 85% (EDIPA) and How Is It Used in Industrial Applications?
Technical Introduction
Ethanol Diisopropanolamine (EDIPA) 85% is a clear to pale yellow liquid chemical composed primarily of ethanol and diisopropanolamine, typically standardized at 85% active content. It functions as a versatile alkanolamine with excellent neutralizing and buffering properties. EDIPA is widely used as a solvent, corrosion inhibitor, and surfactant intermediate in various industries. Its unique combination of ethanol and diisopropanolamine provides good solubility, low volatility, and moderate alkalinity, making it suitable for applications requiring mild alkalinity and effective interaction with acidic components.
Applications
Gas Treatment: Used in gas sweetening to remove acidic gases such as CO₂ and H₂S thrugh absorption processes.
Corrosion Inhibition: Functions as a corrosion inhibitor in cooling water systems and industrial cleaning formulations.
Surfactant Production: Intermediate for manufacturing surfactants, emulsifiers, and detergents.
Textile Industry: Utilized in dyeing and finishing processes as a pH regulator and neutralizer.
Chemical Synthesis: Serves as a reactant or catalyst in organic synthesis and formulation chemistry.
Personal Care Products: Occasionally used as a pH adjuster in cosmetics and personal care formulations.
Advantages
High Purity and Concentration: Provides consistent quality with 85% active content.
Good Solubility: Mixes well with water and organic solvents, enhancing formulation flexibility.
Effective pH Control: Acts as a mild base suitable for neutralization and buffering.
Corrosion Protection: Reduces metal corrosion in various industrial systems.
Low Volatility: Safer handling and reduced emissions compared to more volatile amines.
Specifications (Typical Parameters)
| Parameter | Description | Typical Value |
|---|---|---|
| Appearance | Physical state | Clear to pale yellow liquid |
| Active Content | Concentration of EDIPA | 85% |
| Density | At 20°C | 0.98 - 1.02 g/cm³ |
| pH (10% solution) | Alkalinity | 10 - 11 |
| Viscosity | At 25°C | 20 - 50 mPa·s |
| Flash Point | Closed cup | > 93°C |
| Water Solubility | Miscible | Yes |
FAQ
Q1: What is the primary use of EDIPA in gas treatment?
A: EDIPA is used as an absorbent for removing acid gases like CO₂ and H₂S from natural gas and refinery gases.
Q2: Is EDIPA safe to handle?
A: EDIPA requires standard chemical handling precautions; it has low volatility but can cause irritation upon contact.
Q3: Can EDIPA be used in textile processing?
A: Yes, it is used to regulate pH and neutralize acids during dyeing and finishing processes.
Q4: How does EDIPA compare to other alkanolamines?
A: It offers a balance between amine functionality and solvent properties, with lower volatility than monoethanolamine (MEA).
Q5: What storage conditions are recommended for EDIPA?
A: Store in a cool, dry, well-ventilated area away from strong oxidizers and acids.
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