Inhibited Oxidation of Hydrocarbons in the Presence of Nitrogen, Phosphorus, Selenium, and Sulfur-Containing Heterocyclic Compounds

With the expansion of the scope of lubricant oils and fuels, the requirements for their performance properties are increasing. One of the performance characteristics of these petroleum products is their oxidation resistance. It is known that as a result of oxidation, their performance properties deteriorate. Antioxidant stabilizers are used to increase the resistance of organic materials against oxidation. The study of the mechanism of action of oxidation inhibitors is one of the most important tasks in this field, the solution of which is the creation of a theoretically substantiated approach to the targeted synthesis of more effective antioxidants. To create the theoretical and practical foundations of solving this problem was to find novel classes of effective additives of multivalent activity, particularly antioxidants, a series of recently synthesized nitrogen, sulfur, selenium and phosphorus polyfunctional compounds, including pyrroledithioates, 6,8-bicycloctanes, aminopyrimidine, tris(2-pyridyl)phosphinesulfide and -selenide have been investigated using model oxidative reactions. The compounds studied appear to be perspective inhibitors of hydrocarbon oxidation. Some of them are antioxidants of combined action, breaking the chains of the oxidative reactions with cumene peroxide radicals and catalytically decomposing cumene hydroperoxide.