Sub-Product

Petroleum Pitch (or Asphalt) is a residue from Heat Treatment and Distillation of Petroleum fractions. More specifically it is the Residue from Extractive Refining of Vacuum Resid (also named Tar, or Straight-Run Bitumen) to extract Deasphalted Oil leaving Asphalt as a residual product. It is solid at room temperature, consists of a complex mixture of numerous predominantly Aromatic and Alkyl-substituted Aromatic Hydrocarbons, and exhibits a broad softening range instead of a defined melting temperature. The Hydrogen Aromaticity (ratio of Aromatic to total Hydrogen Atoms) varies between 0.3 and 0.6. The Aliphatic Hydrogen Atoms are typically present in Alkyl groups substituted on Aromatic rings or as Naphthenic (Cycloaliphatic) Hydrogen.