“…Electronic copy available at: https://ssrn.com/abstract=4254570 P r e p r i n t n o t p e e r r e v i e w e d oil with hexamethyldisiloxane at a solvent to oil ratio of 15. Lodi et al [16] investigated deasphalting using supercritical water and extracted 30 wt% of asphalt from vacuum residue. Ahn et al [17] studied the asphaltene removal efficiency of propane, n-butane, and iso-butane for deasphalting of vacuum residue at a solvent to oil ratio of 6:1.…”