Definition
Pitch, gilsonite is a complex combination of hydrocarbons obtained as the raffinate in the extract from a solvent extraction of gilsonite. It consists predominantly of a complex combination of olefins, naphthalenes, pyrroles, pyridines, and other hydrocarbons with a softening point of 80.degree. C to 175.degree. C (176.degree. F to 347.degree. F).
