Study of acidic oxygen-containing and nitrogenous compounds isolated from 150–350 °C fraction of deep-water Gunashli field oil

The article presents the results of studies on the structural-group composition of acidic oxygen-containing and nitrogenous compounds isolated from the 150–350 oC fraction of the deep-water oil of Gunashli field. The oil is light, low sulfur, paraffinic, rich in light fractions, the acid number is 1.01 mg KOH/g, the total content of acidic oxygen-containing compounds is 0.17 %, and total nitrogen is 0.11 % by weight. The acid number of the 150–350 oC fraction from the same oil is 242.3 mg KOH/g. Acidic oxygen-containing compounds isolated from this fraction with a yield of 0.19 %, nitrogen-containing 0.145 % mass. The structural-group composition of the isolated concentrates of acidic oxygen and nitrogen-containing compounds was studied by PMR spectroscopy. It was defined that the acidic oxygen-containing compounds more than 2/3 belong to the naphthenic-paraffin series. Nitrogen compounds are for 78 % composed of aminocompounds with naphthenic-paraffinic radicals and aromatic homologues (22 %). They can be used for the synthesis of metal corrosion inhibitors, additives for lubricating oils and other valuable products.