The effect of different solvent polarity on the precipitation of heavy organics from a crude oil deposit in the Niger Delta
The precipitation of heavy organics (Saturates, Aromatics, Resins and Asphaltenes) from the Niger delta (Atan crude oil residue) was studied. Two C4 organic polar solvents (ethyl acetate and butanone) were used to investigate the effect of polarity of the precipitating solvents. The heavy organics precipitated from Antan crude residue were 3.34% and 3.76% for ethyl acetate and butanone respectively. Asphaltenes were precipitated from the heavy organic precipitates using n-C5 and n-C6 alkanes. Chromatographic separation and spectroscopic analysis of the deasphalted soluble filtrate were carried out. The results identified the presence of saturates, aromatics and resins in the C4 heavy organic precipitate.
Key words: Heavy Organics, Precipitates, Saturates, Aromatics, Resins, Asphaltenes