Methyl Iso Butyl Ketone
Methyl isobutyl ketone (MIBK) is the common name for the organic compound 4-methylpentan-2-one, condensed chemical formula (CH3)2CHCH2C(O)CH3. This colourless liquid, a ketone, is used as a solvent for gums, resins, paints, varnishes, lacquers, and nitrocellulose.
At laboratory scale, MIBK can be produced via a three-step process using acetone as the starting material. Self-condensation, a type of aldol reaction, produces diacetone alcohol, which readily dehydrates to give 4-methylpent-3-en-2-one (commonly, mesityl oxide).Mesityl oxide is then hydrogenated to give MIBK.
Industrially, these three steps are combined. Acetone is treated with a strongly acidic, palladium catalyst-doped cation exchange resin under medium pressure of hydrogen. Several million kilograms are produced annually
Application
Cyclohexanone derivatives are used for the synthesis of pharmaceuticals, dyes, herbicides, pesticides, plasticizers and rubber chemicals.
| Chemical formula | C6H12O |
|---|---|
| Molar mass | 100.16 g/mol |
| Appearance | colorless liquid |
| Odor | pleasant[1] |
| Density | 0.802 g/mL, liquid |
| Melting point | −84.7 °C (−120.5 °F; 188.5 K) |
| Boiling point | 117 to 118 °C (243 to 244 °F; 390 to 391 K) |
| Solubility in water | 1.91 g/100 mL (20 °C) |
| Vapor pressure | 16 mmHg (20 °C)[1] |
| Magnetic susceptibility (χ) | -70.05·10−6 cm3/mol |
| Refractive index (nD) | 1.3958 |
| Viscosity | 0.58 cP at 20.0 °C |
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