HEXANE

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The hexane is a hydrocarbon mixture prevalently composed of: 50% of n-Hexane,45% of isomers(2 and 3-Methylpentane and Methylcyclopentane) and various quantity of Dimethylbutanes e Cyclohexane. In laboratory is used as a solvent*.

The normal hexane withdraws from ligroin which comes from paraffin petroleum. The ligroin is put through fractionated distillation and one can pick up the fraction which distils between 139°F and 158°F. Then the distilled is shaken with the sulphuric acid and one have to retire it for 12 hours sometimes shaking. Then one have to handle the hexane with sulphurical acid at 118,7°F and it is scrubbed with a solution 0.3% of potassium permanganato, then with sodium hydroxigen at 10% and then with distilled water until a neutralization(for all these processes it needs to use a separating). The product, one got, dry onanydrous calcium chloride and the product is put through a new fractionated distilation.

HEXANE'S FEATURES:
Formula:C6H14
Aspect:colourless and transparent liquid
Smell:characterist
Boiling point:140-158°F
Melting point:-139°F
Inflammation point**:-7.6°F
Autoignition limit:464°F
Explosion limits(lower/higher):0.6/7.7% vol.%
Vapour pressure:17.7 KPa(68°F)
Density:0.67 g/cm3
Solubility:insoluble in water
Dielectric constant:1.9

SOLVENT*= it is a substance, generally in liquid state, which can bring other substance in solution without altering its chimical nature.

INFLAMMATION POINT**= it is the temperature where a substance begins to burn.

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