Light cycle oil (LCO) is a petroleum term published in 1994.

The by-products of catalytic cracking process contain a large number of monocyclic and polycyclic aromatic hydrocarbons and diesel components with low cetane number.

The light circulating oil in the catalyst refers to light diesel oil.

Light oil generally refers to hydrocarbon mixture with boiling point range of about 50 ~ 350 ℃, but the meaning is not very strict.

Circulating oil is developed from refined high viscosity index mineral base oil and anti-oxidation, anti rust and wear additives. It has good thermal stability and excellent corrosion resistance, which is conducive to prolonging the service life of the bearing.

Another advantage of circulating oil is that it can quickly separate water and exhaust gas.