Abstract
Liquid-phase aerobic oxidation of naphthene-paraffinic hydrocarbons at 217-330о С of diesel fraction of Balakhany oils in the presence of the mixtures of Mn, Cr salts of natural petroleum acids (MeNPA) has been investigated. The catalytic oxidation process is realized for 7 hours at temperature 135-1400C in a barbotage reactor. Samples were taken every hour and oxidized product was separated by composition in accordance with known methods. Mechanism of oxidation process of naphthene-paraffinic hydrocarbons has been studied by IR- spectroscopy. It has been found that, after 5 hours oxidation of naphthene-paraffinic hydrocarbons the yield of obtaining synthetic petroleum acids rich 16,5%, the yield of oxysynthetic petroleum acids-18%. The changes of the optical density of a carbonyl and a hydroxyl groups depending on the time were studied. It was found that the oxidation reaction should be conducted within 6 hours, as D1713(C=O) and D941(OH) after 6 hours decrease and it’s probably connected with beginning decomposition process of the acids and oxyacids.
Highlights
Oxidative conversion of petroleum hydrocarbons in oxygenated products is one of the effective ways of rational processing of natural hydrocarbons.It may be noted, in particular, the studies of the catalytic oxidation of petroleum pharaffinic fraction [1], oil fraction from the oil with low and high sulfur and aromatics content [2], naphthene and naphthene -paraffinic hydrocarbons of oil [3,4,5,6].The oxidizing transformation of petroleum hydrocarbons to afford respective oxygen containing compounds is estimated as effective approach to the rational processing of oil hydrocarbons raw stock [7]
The results of time dependence of oxidation process of naphthene-paraffinic hydrocarbons in the presence of MnNPA, CrNPA are presented in table 2
The naphthene-paraffinic hydrocarbons of Balakhany oil has been oxidized in the catalytic presence of Mn and Cr salts of natural petroleum acids (NPA)
Summary
Oxidative conversion of petroleum hydrocarbons in oxygenated products is one of the effective ways of rational processing of natural hydrocarbons.It may be noted, in particular, the studies of the catalytic oxidation of petroleum pharaffinic fraction [1], oil fraction from the oil with low and high sulfur and aromatics content [2], naphthene and naphthene -paraffinic hydrocarbons of oil [3,4,5,6].The oxidizing transformation of petroleum hydrocarbons to afford respective oxygen containing compounds is estimated as effective approach to the rational processing of oil hydrocarbons raw stock [7]. Oxidative conversion of petroleum hydrocarbons in oxygenated products is one of the effective ways of rational processing of natural hydrocarbons. It may be noted, in particular, the studies of the catalytic oxidation of petroleum pharaffinic fraction [1], oil fraction from the oil with low and high sulfur and aromatics content [2], naphthene and naphthene -paraffinic hydrocarbons of oil [3,4,5,6]. The synthesis of the SPA with a high-yield is of a great practical importance, and we involve a naphthene -paraffinic hydrocarbons of Azerbaijan oil blend as a major research object to conduct the research work to obtain the targeted products
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