Methyl isobutyl ketone

Methyl Isobutyl Ketone (MIBK) Solvent

• Methyl Isobutyl Ketone (MIBK) is a clear, colorless, stable liquid with moderate volatility and a characteristic odor. This solvent is widely used in surface coatings, adhesive production, ink manufacturing, and dissolving nitrocellulose, epoxy resins, and other polymers.
• Other names: 2-Methyl-2-pentanone, Isopropylacetone, Hexone, Isobutyl methyl ketone, 2-Methylpropyl methyl ketone, 4-Methyl-2-oxopentane, MIK, Isobutylmethyl ketone, MIBK.
• Chemical formula: (CH₃)₂CHCH₂C(O)CH₃

Properties of Methyl Isobutyl Ketone (MIBK)

• Appearance: Colorless liquid with a characteristic ketone odor.
• Molecular weight: 100.16 g/mol.
• Density: 0.802 g/mL.
• Melting point: -84.7°C.
• Boiling point: 117-118°C (243-244°F; 390-391K).
• Water solubility: 1.91 g/100 mL at 20°C.
• Vapor pressure: 16 mmHg (20°C).
• Refractive index: 1.3958.
• Flash point: 14°C (57°F; 287K).
• Viscosity: 0.58 cP at 20°C.

Production of Methyl Isobutyl Ketone (MIBK)

Methyl Isobutyl Ketone is synthesized from acetone through a three-step process:

1. Aldol condensation of acetone produces diacetone alcohol.
2. Dehydration of diacetone alcohol forms mesityl oxide.
3. Hydrogenation of mesityl oxide yields MIBK.

In industrial settings, these steps are combined into a single process where acetone is treated with acidic ion-exchange resins, along with palladium under moderate hydrogen pressure.

Applications of Methyl Isobutyl Ketone (MIBK)

• Surface coatings:
  • MIBK is an excellent solvent for vinyl copolymers, epoxy resins, nitrocellulose, acrylics, synthetic and natural resins.
  • It is a key component in solvent systems for high-solid content coatings and low-viscosity applications.
• Adhesives:
  • MIBK is widely used in adhesive and cement production, particularly for vinyl polymers, nitrocellulose, and acrylic resins.
  • Its moderate evaporation rate makes it ideal for adhesive applications.
• Extraction solvent:
  • In the pharmaceutical industry, MIBK is used as a solvent for extracting antibiotics, natural oils, fats, and waxes.
  • It is preferred in cases where low water solubility is required.
• Other applications:
  • Used in the manufacture of pesticides, degreasers, and printing inks.

Safety Precautions When Using Methyl Isobutyl Ketone (MIBK)

To ensure safe handling and use of Methyl Isobutyl Ketone, follow these safety guidelines:

✅ Storage:

• Keep in a dry, well-ventilated area away from direct sunlight.
• Store away from heat sources and ignition sparks.

✅ Handling:

• Use specialized containers and keep lids tightly closed when not in use.
• Regularly clean storage areas to prevent leaks and minimize fire hazards.

✅ Personal Protection:

• Wear protective equipment to prevent direct contact with the solvent, especially in sensitive areas.

✅ Fire Prevention:

• Ensure the storage area has a fire suppression system to prevent fire hazards.