FRACTION OF THE FURRIAL ASPHALTEN ORGANIC COMPOUNDS OF DIFFERENT ACIDITY

Labrador Henry. and Jenny Hernández

Laboratory of Petroleum, Hydrocarbons and Derivatives. Department of Chemistry.  Experimental Faculty of Sciences and Technology, University of Carabobo, Venezuela. E-mail: hjlabrad@uc.edu.ve

The organic compounds used of different acidity (4-nitrophenol, 2-nitrophenol and picric acid) for the fraction of the asphaltene resulting from the Venezuelan Furrial crude. From these applied compounds, what we achieved from the fraction was the 4-nitrophenol and the picric acid, forming two fractions in both compounds, one called A1, with low solubility and another called A2, with high solubility, both measure in toluene. The A2 acts as a dispersant agent of the A1, maintaining the suspension and given stability to the asphaltene crude oil. We can indicate that independently from the organic compound in which we achieve the fraction, we did not found any noticeable difference with respect to the following: Percentage of the fraction in the beginning of the asphaltene flocculation and infrared. In the 2-nitrophenol case we did not achieved fraction of the asphalteno, this could be possible to the low acidity (pKa 7.17) and the possibility that a bridge is formed of hydrogen intramolecular, what possible make it impossible to formed a complex and so a fraction it.  With these results obtained we can indicate that a feasible formation of the organic asphaltene complex is due principally to the formation of the hydrogen bridges or/the transference charges.