De-asphalter

A deasphalting is a process plant of an oil refinery in which vacuum residue in a paraffinic fraction ( deasphalted oil, English: deasphalted oil, DAO ) and a (highly) aromatic fraction ( asphaltenes, English:. Asphaltenes ) is split.

Entasphaltierungsanlagen are usually so-called solvent - deasphalter ( engl: solvent deasphalter, SDA). As the solvent is propane, butane, or even n-pentane and n-hexane in question. SDA separating the asphaltenes from the vacuum residue as the light hydrocarbons, the aliphatic portions of triggers ( extract ), but not asphaltenes. DAO is used in the production of lubricating oil, for the production of microcrystalline wax, and as a reactant for an FCC or HCU system. The asphaltenes are fed to a flexicoker, a gasification or direct combustion.

DAO a propane deasphalting (PDA) indicates the highest quality ( low metal content ), a (PDA), but results in a low yield. n- pentane doubled or tripled the yield, the DAO is however increasingly contaminated with metals and asphaltenes, thus reducing the life of the FCC or HCU catalyst When butane is used as a solvent, then one speaks of a butane deasphalting (BDA).