Sub-Product

Heavy Naphtha is a distillation cut primarily made up of material roughly the same density as finished Gasoline. Heavy Naphtha molecules typically have from 7-9 carbon atoms. Its boiling range can be from 180°F (80°C) to 330°F (170°C)*. Most of the Heavy Naphtha in a refinery comes directly from the atmospheric distillation unit (CDU). However, additional volumes may come from the hydrocracker (as Heavy Hydrocrackate) or from the coker (as Coker Naphtha). The Heavy Naphtha distillation cut is typically sent to the reformer to upgrade its quality to make it suitable as a Gasoline blendstock. Heavy Naphtha can also be blended directly into Gasoline, but its low octane makes this undesirable. *Boiling range definition varies according to source.