Isomerization leads to production of a compound with another atomic (group) arrangement but composition and molecular weight do not change. Isomerization is often called rearrangement, sometimes these are name reactions (isomerization processes) according to the tradition.

Isomerization Process is aimed at production of high-octane components of commercial gasoline from low-octane oil fractions by structural change of carbon skeleton.

Isomerization of Gasoline reactions are possible due to Isomery – a phenomenon that consists in existing of several compounds with equal molecular weight, quantitative and qualitative composition, but with different physical and chemical characteristics. Such compounds are called isomers.

An Isomerization Unit is represented by a process system, consisting of blocks interconnected by process streams: