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

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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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