Comparison of precipitation and extrography in the frctionation of crude oil residua

摘要

Four different crude oils-Arab Heavy (AH), Arab Berri (AB), Alaskan North Slope (ANS), and San Joaquin Valley (SJV)-were characterized by separating the crudes into compound classes By two different fractionation methods-extrography (ext0 and asphaltene precipitation followed By extrographic isolation of the resins (ppt + ext). The fractions derived from these two methods Of separation were characterized and compared in order to determine the most complete and Discriminating compositional analysis for subsequent use in studies concerning the stability of Emulsions or sludges which are produced by these crudes in refinery processing.