2-Methylbutane cas 78-78-4-Deshang Gas Chem

Description

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Products Description

Product Name: 2-Methylbutane

CAS: 78-78-4

Molecular formula：C5H12

Molecular weight：72.15

EINECS：201-142-8

Chemical properties

Colorless transparent liquid. Melting point is -160℃, boiling point is 27.85℃ (30-30.2℃), relative density is 0.6201, refractive index is 1.3537, flash point is -56℃. It is miscible with ethanol and ether, but insoluble in water.

2-Methylbutane Chemical Properties

Melting point	-160 °C
Boiling Point	30 °C(lit.)
Density	0.62 g/mL at 25 °C(lit.)
Vapor density	2.6 (vs air)
Vapor pressure	11.17 psi ( 20 °C)
Refractive Index	n20/D 1.354(lit.)
Flash point	−51 °C
Storage conditions	2-8°C
Solubility	The solubility in water is 0.048 g/L
Form	liquid
Acidity coefficient (pKa)	>14 (Schwarzenbach et al., 1993)
Color	Transparent and colorless
Odor	Gasoline-like smell
Odor Threshold	1.3ppm
Explosive limit	1.3-7.6%(V)
Water solubility	Miscible with water, hydrocarbons, oils, alcohol and ether.
Maximum wavelength (λmax)	λ: 192 nm Amax: 1.00λ: 210 nm Amax: 0.30λ: 220 nm Amax: 0.07λ: 240-400 nm Amax: 0.01
Stability	Stable. Highly flammable. Incompatible with strong oxidizing agents. Vapor-air mixtures are explosive in certain proportions. Incompatible with rubber, various plastics. Vapors are heavier than air and may roll on surfaces and collect in low spots. Note the low flash point.

Uses

1. When used as a solvent, it has the same effect as pentane, hexane, heptane, etc., but its solubility is slightly worse than pentane. This product has a high octane number and can be used as fuel for automobiles and aircraft.

2. It can be used as a solvent for catalysts in polyethylene production, a foaming agent for expandable polystyrene, a foaming agent for polyurethane foam systems, a deasphalting solvent, etc.

Production method

It is separated from oil cracking products or platinum reforming oil. The impurities contained in industrial-grade 2-methylbutane are alkanes, cycloalkanes, unsaturated hydrocarbons and water with similar boiling points. Unsaturated hydrocarbons are removed by washing with concentrated sulfuric acid; water is removed by dehydrating agents such as anhydrous calcium chloride, phosphorus pentoxide or metallic sodium, and molecular sieve dehydration can also be used; finally, fractionation and refining are performed, and the distillate is used with a high-temperature activated silica gel adsorption column to remove trace straight-chain hydrocarbon impurities. Using pentane as the raw material, 2-methylbutane can be obtained by liquid-phase catalytic isomerization at 95°C.