MoS is also used as a catalyst in hydrocracking of petroleum fractions containing nitrogen, sulfur and oxygen.

Oil refineries produce olefins and aromatics by fluid catalytic cracking of petroleum fractions.

From the 1960s until the 1990s, significant amounts of naphthalene were also produced from heavy petroleum fractions during petroleum refining, but today petroleum-derived naphthalene represents only a minor component of naphthalene production.

Hydrogen is mainly used for the conversion of heavy petroleum fractions into lighter ones via the process of hydrocracking and other petroleum fractions (dehydrocyclization and the aromatization process).

Typically lubricants contain 90% base oil (most often petroleum fractions, called mineral oils) and less than 10% additives.

The most commonly encountered application of FD/FI at the present time is the analysis of complex mixtures of hydrocarbons such as that found in petroleum fractions.

In the Primitive era natural petroleum fractions were the source of power and natural rubber cushioned the wheels.

Vocabulary shift is the worst hurdle in time-jumps-did you know that "service station" once meant a dispensary for petroleum fractions?

Mazut is a residual fuel oil often derived from Russian petroleum sources and is either blended with lighter petroleum fractions or burned directly in specialized boilers and furnaces.

The refinery also produced other petroleum fractions (e.g, kerosene, fuel oils).