Petrochemical Basis

Natural gas => Mostly Methane
Crude oil => Petroleum gas C1-4 bp~40 C
=> Naptha C5-9 bp 60-100 C
=> Gasoline C5-12 bp 40-205 C
=> Kerosene C10-18 bp 175-325 C
=> Diesel >C12 bp 250-350 C
=> Lubricating oil C20-50 bp 300-370
=> Heavy gas/Fuel oil C20-70 370-600
=> Coke/asphalt/wax >C70 bp >600
Light crude oil => Less wax content
Sour crude oil => contain sulfur >1%
Sweet crude oil => contain sulfur <0.5%
Natural gas condensate
generally has a specific gravity ranging
from 0.5-0.8 and may contain:
Hydrogen sulfide
Mercaptan (RSH)
Carbondioxide
Straigt chain alkane
Cyclohexane
Aromatics