Various implementations and various combinations of solvent deasphalting with the modern processes of deep oil refining are considered, and the ways of processing the separation products formed are demonstrated. Specific features of the main technologies used in Russia and other countries are discussed. Particular attention is paid to perspective technologies implementing the fuel direction of the process using both traditional hydrocarbon solvents and nontraditional solvents such as organic carbonates and carbon dioxide.

We demonstrate that the method based on supercritical fluid extraction (SFE) using supercritical carbon dioxide (SC-CO2) as a basis of a solvent can be used, in principle, to fractionate a...

The characterization of the feedstock is an important analytical task in the modeling and development of processes for upgrading of petroleum residues. This work presents the results of fractionation of the vacuum petroleum residue by extraction using a mixture of CO₂ and toluene as a solvent. Fractionation was carried out by changing the ratio of components in the mixture by successively increasing the concentration of toluene in the composition of the CO₂ stream from 0% to 50%. As a result of separation of the vacuum residue, nine fractions of the extract with a yield of 83.1% were obtained. Graphical abstract

The effect of the addition of iron oxide nanoparticles on the efficiency of asphaltenes removal during subcritical pentane deasphalting of the atmospheric residue from heavy oil has been studied. It was found that nanoparticles formed in situ from a precursor solution, despite a slight decrease in the deasphalted oil (DAO) yield, provide a significant decrease in the asphaltene content in DAO as well as increasing metal and Conradson carbon residue removal efficiency compared to particles introduced into the oil residue in the form of a powder.