NITROGEN CONTAINING COMPOUNDS FROM IRAQIAN CRUDE-OIL - KIRKUKREGION - ISOLATION AND ANALYSIS

A method was developed and tested for the isolation of nitrogen containing compounds from Iraqian crude oil - Kirkuk region. Native kerosene, absolute alcohol and a 6N NaOH solution in water were used as eluents. A metal column packed with an ion-exchange resin with active centers of -SO3H groups was used. It was found that acidic and neutral, but not basic products can be extracted by the first eluation of the column, where the absorption has occurred, on account of the supra-molecular structures. Neutral and basic nitrogen containing compounds are isolated by the next eluation with kerosene, alcohol and 6N NaOH. The main chromatographic peaks were identified in those 3 fractions as follows: Kerosene fraction: contains carbazoles with alkyl substituted at the nitrogen atom and in the benzene ring, Ethanol fraction: contains n-alkylanilines and alkylcarbonyl derivatives of n-methylaniline NaOH fraction: the eluation was followed by extraction with Et2O, and it contains pyrrole derivates and other basic nitrogen containing compounds.