Three samples of bituminous material with different softening temperatures 321, 332, and 356.4 K were obtained by the method chemical modification tar formaldehyde using sulfuric acid as a catalyst. The determination group hydrocarbon composition was carried out for raw materials process (tar) resulting bitumens. An FTIR study groups hydrocarbons (oil, resins, asphaltenes) also out. structural ...

The study of the behavior asphaltenes in solution has focused on their tendency to form aggregates and less importance been given describing understanding what allows formation asphaltene that remain stably dispersed. Using molecular dynamics simulations, we calculated dipole moment models for aggregate tends zero when number molecules large values. In other words, such cancellation would be an...

High oxygen content and ultracomplex composition are the biggest property characteristics of coal tar, which is also reason for difficulty tar separation processing. The distribution oxygen-containing compounds (OCs) asphaltene island/archipelago structure play a key role in solubility hydrogenation thermal conversion tar. In this study, OCs medium low temperature (MLCT) its subfractions were i...