Study of the heavy oil asphaltenes oxidation products composition using EPR and IR spectroscopy

In this work, variations of heavy oil asphaltenes' oxidation reactions under different conditions were investigated. By IR spectroscopy was shown a predominant destruction of occluded and adsorbed compounds in asphaltenes when using KIO(3)and NaIO(4)as oxidizing agents. In the case of CH3COOH/H(2)O(2)and KMnO(4)was determined the destruction of asphaltenes supermolecules with a formation of carboxyl groups. EPR spectroscopy demonstrated decrease of content of vanadyl complexes spin per gram of oxygenates 0.5-2 times in comparison with initial asphaltenes, which indicates the separation of occluded metalloporphyrins. Content of free stable radicals in high molecular products increased in 2-4 times.